CN102201021B - Expressway aided design system - Google Patents
Expressway aided design system Download PDFInfo
- Publication number
- CN102201021B CN102201021B CN 201110107871 CN201110107871A CN102201021B CN 102201021 B CN102201021 B CN 102201021B CN 201110107871 CN201110107871 CN 201110107871 CN 201110107871 A CN201110107871 A CN 201110107871A CN 102201021 B CN102201021 B CN 102201021B
- Authority
- CN
- China
- Prior art keywords
- street
- design
- traffic
- gateway
- speed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Traffic Control Systems (AREA)
- Management, Administration, Business Operations System, And Electronic Commerce (AREA)
Abstract
The invention discloses an expressway aided design system. The system comprises an expressway traffic design platform, a storage unit, an expressway passing capacity module, an entrance and exit minimum distance design module, an expressway mean line delay module and an expressway aided design comprehensive evaluation module, wherein the storage unit stores predefined regulations and database files; the expressway passing capacity module is used for calculating the passing capacity according to a group of given expressway basic parameters and a model in the storage unit; the entrance and exitminimum distance design module is used for completing the minimum distance design according to a group of give entrance and exit combination types, the mean line and side road design speeds and a smoothness model in the storage unit; the expressway mean line delay module is used for calculating mean line delay according to a group of give mean line and side road straight flows, entrance and exit flows, mean line and side road expected speeds and the like, and traffic simulation software in the storage unit; and the expressway aided design comprehensive evaluation module performs comprehensivescoring on the designing result to obtain an evaluation result. By the expressway aided design system, the design scheme and evaluation can be automatically obtained, so that the expressway design system is improved, and the scheme comparison efficiency and design efficiency are improved.
Description
Technical field
The present invention relates to a kind of traffic engineering design aiding system, relate in particular to a kind of auxiliary calculating and design evaluation system towards the through street design.
Background technology
At present, basic theory and technology that the through street is designed are mature on the whole, and especially for aspects such as traffic capacity calculating, gateway ride comfort calculating, all have ripe computing formula and normative form to use.
The through street design includes many complex engineering models: the one, and the traffic capacity, according to different objects different computation models is arranged, and in the performance model process, need to consider a large amount of initial conditions, such as category of roads, vehicle formation, lane width, Horizontal Clearance etc., taken through street deviser's energy greatly.The 2nd, the gateway design, need be on certain predicted flow rate basis, draw according between the two distance under the adjacent entrance various combination relation (advance-go out, go out-advance, advance-into and out of-go out), need simultaneously to consider that the gateway is apart from the spacing between the adjacent crossing of bypass, to guarantee the current non-interference between adjacent entrance, gateway and the bypass crossing, avoid because blocking up of certain gateway has influence on through street main line or surface road crossing.Above-mentioned two contents, its workload is very big, up to now, yet there are no the aided design system that adapts.Simultaneously, the assessment of city expressway design proposal also still is to use traditional quantitative calculation method, its real result is poor.
Along with the widespread use of computer system in every field, especially at the traffic engineering design aspect, be starved of and a kind ofly can take full advantage of computer means, improve in the traffic design of through street the method for designing about the traffic capacity and crossing spacing, and then more scientifically and rationally the through street traffic design is made assessment, to improve the through street design system, improve design efficiency, the efficient of improvement project comparison.
Summary of the invention
At above-mentioned prior art, the invention provides a kind of through street traffic design aided design system.Essence of the present invention is that traffic design Study on Technology achievement is combined with the computer system item, makes its computer programing, thereby makes the through street traffic design more reliably, easily and fast.The function that through street of the present invention traffic design aided design system is realized mainly comprises: designing a model with through street traffic capacity model and gateway is the basis, draw the through street traffic capacity and gateway spacing, and scientific and reasonable evaluation is made in the gateway design.Aided design system of the present invention, only need the information such as main line delay of this condition of user's input channel roadbed, gateway type, spacing, emulation output, can draw the through street traffic capacity, gateway design proposal and evaluation automatically, perfect present through street design system, improve the efficient of scheme comparison in the design, thereby improved design efficiency.
In order to solve the problems of the technologies described above, the technical scheme that through street of the present invention traffic design aided design system is achieved is to comprise:
One through street traffic design platform, described design platform is a man-machine dialog interface;
One storage unit, described cell stores has predefined rule and database file;
The definition of described rule comprises that through street traffic capacity model, gateway, through street ride comfort model, through street traffic simulation software and through street assist the design proposal comprehensive evaluation model;
Wherein:
(1) described through street traffic capacity model, comprising: the maximum service volume of i level service level and unidirectional track design capacity under the ideal conditions are expressed as respectively:
MSV
i＝C
B×(V/C)
i (1)
In the formula (1):
MSV
i---the maximum service volume of i level service level under the ideal conditions, unit: pcu/h/ln;
C
B---basic capacity, the maximum volume of traffic that can pass through in next track of ideal conditions, unit: pcu/h/ln; The speed flowrate curve that actual measurement obtains according to road traffic, its span is: 1400-2200pcu/h/ln;
(V/C)
i---the ratio of the i level service volume of traffic and basic capacity, according to according to " city expressway design discipline ", its scope of getting is: 0.77-0.91;
Because the traffic on the through street belongs to continuous stream, therefore, unidirectional track design capacity is expressed as:
C
D＝MSV
i×f
N×f
w×f
HV (2)
In the formula (2):
C
D---the one-way pavement design capacity, namely under actual conditions, the maximum service volume that can pass through when adopting i level service level, unit is veh/h;
f
N---the number of track-lines correction factor of one-way pavement, according to the number of track-lines difference, its value is respectively:
Number of track-lines is 1 o'clock, f
N=1;
Number of track-lines is 2 o'clock, f
N=1.95;
Number of track-lines is 3 o'clock, f
N=2.72;
Number of track-lines is 4 o'clock, f
N=3.22;
f
w---lane width and Horizontal Clearance correction factor, according to track layout and both sides, track whether the barrier difference is arranged, its value is as follows respectively:
Wherein, the unit of Horizontal Clearance and lane width is m;
f
HV---large car is to the correction factor of the traffic capacity,
In the formula (3):
P
HV---the heavy goods vehicles volume of traffic accounts for the number percent of total wheel traffic;
E
HV---heavy goods vehicles is converted into the vehicle conversion factor of minibus, and value is 2.
(2) draw gateway, described through street ride comfort model by following step:
At first, utilize a plurality of places speed of vehicle detector to gather the speed of key node, the computation model and the road model that in a computer system, comprise smooth-going degree at least, utilize the computation model of described smooth-going degree that the traffic study data are analyzed and handled, finally draw gateway, through street ride comfort model; Its concrete steps are as follows:
Step 2-1, the speed mean square deviation under all kinds of road traffic conditions is carried out traffic study, the distribution situation of analysis speed mean square deviation;
Step 2-2, according to the distribution situation of speed mean square deviation, set up the computation model of smooth-going degree:
y＝e
-αx (4)
In the formula (4):
α is driver's driving performance correlation parameter, and α is that the smooth-going degree value of the speed of a motor vehicle mean square deviation distribution characteristics value correspondence that obtains with factual survey calculates, and α is between 0.05～0.1;
X is the speed mean square deviation, the km/h of unit, and under the situation that blocking the way travel permit spare is determined, the driver drives the mean square deviation that the speed of a motor vehicle distributes, and its value is more little, shows that the ride comfort of this road conditions is more good;
Y is smooth-going degree, and between 0～1, the speed mean square deviation is 0 when smooth-going degree is 1, and this is ideal situation;
The speed variance is more big, and smooth-going degree is more low, and ride comfort is more poor; According to the computation model of this smooth-going degree, determine critical smooth-going degree value, that is: with the smooth-going degree value of the 30 hundredths speed of a motor vehicle mean square deviation correspondences that obtain in the on-site inspection as critical smooth-going degree;
Step 2-3, select traffic simulation software according to the traffic simulation demand, and carry out the parameter calibration of traffic simulation software in conjunction with the field investigation data, the condition of its parameter calibration is: the error between emulation speed of a motor vehicle mean square deviation and the actual measurement speed of a motor vehicle mean square deviation is less than or equal to 5%, and to determine entrance minimum spacing initial value be 100m;
Step 2-4, set up road model and comprise and set up basic road network and determine the input and output parameter;
Described basic road network comprises at least: main road number of track-lines, bypass number of track-lines, gateway canalization form;
Described input parameter comprises at least: main road craspedodrome flow, rate of discharge, inlet flow rate, bypass craspedodrome flow, main road desired speed, bypass desired speed, outlet vehicle critical gap, entrance vehicle critical gap, interwoven region critical gap;
Described output parameter comprises at least: the speed of key node, the average velocity of outlet, the average velocity of entrance, the average velocity of the section of interweaving;
Step 2-5, described a plurality of places speed of vehicle detector is arranged on the key node place, to determine the smooth-going degree of gateway under all kinds of combination situations exactly, wherein, described key node refers to the key position of detection speed, described key node comprises all unique points, that is: deceleration canalization section starting point, outlet starting point, outlet terminal point, entrance starting point, entrance terminal, entry accelerated segment endpoint; In addition, between above-mentioned each key node, be place speed of vehicle detector uniformly at intervals with 10m; In addition, in the upstream and downstream 100m of head and the tail key node scope, be place speed of vehicle detector uniformly at intervals with 25m;
Step 2-6, based on determined road, determine the speed mean square deviation under the highway section state of emulation perfect condition and all kinds of combination situations of emulation respectively;
Step 2-7, according to above-mentioned speed mean square deviation, utilize the smooth-going degree value of smooth-going degree computation model, judge whether this smooth-going degree satisfies critical smooth-going degree requirement, if meet the demands execution in step 2-8; Otherwise, be after the basis increases progressively a step-length, to return step 2-4 with current gateway minimum pitch value, carry out microscopic traffic simulation again; Step-length does not wherein coexist according to the gateway composite type and chooses in 20m～100m scope;
Step 2-8, this moment, corresponding gateway minimum spacing was definite minimum gateway spacing;
Draw the gateway minimum spacing of following different gateways composite type based on ride comfort, unit: m by above-mentioned steps;
When carrying out gateway ride comfort calculating, composite type according to the auxilliary road speed of a motor vehicle and gateway, directly from the gateway minimum spacing of above-mentioned different combination types, inquire value corresponding, as the minimum spacing recommendation under the optimum ride comfort, and formed gateway, through street ride comfort model, that is: draw the recommendation of the smooth-going degree in gateway under the different condition, wherein:
It is as follows to go into-go out the corresponding smooth-going degree of combination:
It is as follows to go out-go into the corresponding smooth-going degree of combination:
It is as follows to go out-go out the corresponding smooth-going degree of combination:
It is as follows to go into-go into the corresponding smooth-going degree of combination:
(3) main line that utilizes traffic simulation software to draw described through street is incured loss through delay:
Choosing of traffic simulation software: select the arbitrary money among VISSIM and the SYNCHRO;
The result of traffic simulation comprises at least: main line flow, the main line speed of a motor vehicle, main line are incured loss through delay, oil consumption;
Wherein: the main line delay is:
d＝Lw×3.6/v-Lw×3.6/80 (5)
In the formula (5):
Lw is interwoven region length, and unit is m;
The v speed of a motor vehicle of serving as theme, unit is km/h.
(4) the auxiliary design proposal comprehensive evaluation model in through street:
Comprehensive evaluation model according to the above-mentioned main line that obtains is incured loss through delay, three indexs of the smooth-going degree of the main road traffic capacity and gateway are set up the auxiliary design proposal in through street in designing scoring, has following several situation:
When getting main line delay, three indexs of the smooth-going degree of the main road traffic capacity and gateway as evaluation criterion, the mark of through street design synthesis scoring is:
When getting the main road traffic capacity and gateway two indexs of smooth-going degree as evaluation criterion, the mark of through street design synthesis scoring is:
P＝y(100-a
1-a
2-a
3)+a
1y+a
2q/CAP
w (7)
When getting main line delay and gateway two indexs of smooth-going degree as evaluation criterion, the mark of through street design synthesis scoring is:
When only taking out the smooth-going degree index of entrance as the evaluate alternatives standard:
P＝y(100-a
1-a
2-a
3)+a
1y (9)
In formula (6), formula (7), formula (8) and the formula (9):
P---design the mark of scoring for the through street;
Y---the smooth-going degree in gateway that utilizes gateway, described through street ride comfort model to draw;
D---utilizing main line that described traffic simulation software draws to incur loss through delay or getting that basic main line incurs loss through delay is 10; Unit is s;
CAP
w---weaving section capacity, unit: vehh
-1
a
1, a
2, a
3---calculating parameter, wherein a
1=0-0.20, a
2=0-0.20, a
3=0-0.20;
Draw the evaluation result of design proposal according to through street design synthesis scoring mark:
0≤P＜30, the evaluation result of design proposal are general;
30≤P＜60, the evaluation result of design proposal are good;
60≤P≤100, the evaluation result of design proposal are outstanding;
The recommendation database, through street, Tianjin Research on Design recommendation database, city expressway design discipline recommendation database, Beijing municipal administration institute design recommendation database, the China's city planning design and research institute design recommendation database that comprise the gateway ride comfort in the described database file;
Through street traffic capacity module is used for drawing this through street traffic capacity according to the basic parameter of one group of given through street and the through street traffic capacity model of described storage unit;
Gateway minimum spacing design module is for the design of finishing according to gateway, the through street ride comfort model of one group of given gateway composite type, main line design speed, the auxilliary road speed of a motor vehicle and described storage unit based on the gateway minimum spacing of ride comfort;
The through street main line is incured loss through delay module, is used for drawing this through street main line delay according to the traffic simulation software of one group of given main road craspedodrome flow, rate of discharge, inlet flow rate, bypass craspedodrome flow, main road desired speed, bypass desired speed, main road car accident rate, main road vehicle composition, main road stop public transit vehicle flow and described storage unit;
The design synthesis evaluation module is assisted in the through street, the design result of the above-mentioned through street traffic capacity that draws and gateway minimum spacing and the gateway ride comfort in the described storage unit and through street main line are incured loss through delay the design proposal that constitutes carry out comprehensive grading, thereby draw the evaluation result of this through street design proposal.
Compared with prior art, the beneficial effect of through street of the present invention traffic design aided design system is:
Through street of the present invention aided design system, scheme comparison with through street design of traffic capacity, the design of gateway spacing and passageway part ride comfort is estimated and comprehensive through street design proposal comparison Function of Evaluation, thereby auxiliary city expressway projector carries out selection and the evaluation of design proposal, improve deviser's work efficiency and designing quality, reduced the job costs of through street system design.
Description of drawings
Fig. 1 is through street of the present invention traffic design aided design system functional block diagram;
Fig. 2 is traffic capacity module process flow diagram in the aided design system of the present invention;
Fig. 3 is minimum spacing module process flow diagram in gateway, through street in the aided design system of the present invention;
Fig. 4 is the auxiliary design module process flow diagram in a through street in the aided design system of the present invention;
Fig. 5-the 1st, the sectional drawing at the main interface of the embodiment of the invention;
Fig. 5-the 2nd, the interface sectional drawing of road attribute parameter input in the embodiment of the invention;
Fig. 5-the 3rd, the interface sectional drawing of traffic ability calculating parameter in the embodiment of the invention;
Fig. 5-the 4th, the interface sectional drawing of traffic ability comparison result output in the embodiment of the invention;
Fig. 5-the 5th, the preservation of traffic ability result of calculation and derivation interface sectional drawing in the embodiment of the invention;
Fig. 5-the 6th, weaving section capacity calculates the interface sectional drawing in the embodiment of the invention;
Fig. 5-the 7th, the neutral traffic row of embodiment of the invention ability is calculated the interface sectional drawing;
Fig. 5-the 8th, parameter inputting interface sectional drawing in the distance computation of gateway in the embodiment of the invention;
Fig. 5-the 9th, in the embodiment of the invention in the distance computation of gateway standard choose the interface sectional drawing;
Fig. 5-the 10th, gateway distance computation and interface sectional drawing as a result in the embodiment of the invention;
Fig. 5-the 11st, the interface sectional drawing that smooth-going degree calculates and schemes synthesis is marked in the embodiment of the invention.
Embodiment
Below in conjunction with the drawings and specific embodiments through street of the present invention traffic design aided design system is done to describe in further detail.
Through street of the present invention aided design system comprises:
One through street traffic design platform, described design platform is a man-machine dialog interface;
One storage unit, described cell stores has predefined rule and database file; Comprise in the described database file of in described storage unit, storing:
The recommendation database of gateway ride comfort;
Through street, Tianjin Research on Design recommendation database;
City expressway design discipline recommendation database;
Beijing municipal administration institute design recommendation database;
China's city planning design and research institute design recommendation database.
One through street traffic capacity module, be used for drawing this through street traffic capacity according to the basic parameter of one group of given through street and the through street traffic capacity model of described storage unit, the described through street traffic capacity comprises the through street main line traffic capacity, through street weaving section capacity and the through street grade separation traffic capacity, and above-mentioned each traffic capacity data are recorded in the database file of storage unit, preserve Query Database thereby form historical record data.Shown in Fig. 5-1, Fig. 5-2, Fig. 5-3 and Fig. 5-4.It is input as substantially: number of track-lines, lane width, clear, Horizontal Clearance, large car proportion etc. are arranged.Its calibrating parameters comprises: bicycle road basic capacity (according to actual measurement obtain for 1700pcu/h/ln), the reduction coefficient of VC ratio, track correction factor, lane width correction factor, large car and dolly etc.Finally be output as: the through street traffic capacity of demarcating based on the through street traffic flow parameter, based on the through street traffic capacity of through street design discipline.
One gateway minimum spacing design module is for the design of finishing according to gateway, the through street ride comfort model of one group of given gateway composite type, main line design speed, the auxilliary road speed of a motor vehicle and described storage unit based on the gateway minimum spacing of ride comfort;
One through street main line is incured loss through delay module, is used for drawing this through street main line delay according to the traffic simulation software of one group of given main road craspedodrome flow, rate of discharge, inlet flow rate, bypass craspedodrome flow, main road desired speed, bypass desired speed, main road car accident rate, main road vehicle composition, main road stop public transit vehicle flow and described storage unit;
The design synthesis evaluation module is assisted in one through street, the design result of the above-mentioned through street traffic capacity that draws and gateway minimum spacing and the gateway ride comfort in the described storage unit and through street main line are incured loss through delay the design proposal that constitutes carry out comprehensive grading, thereby draw the evaluation result of this through street design proposal.
The predefined rule of in described storage unit, storing, the definition of this rule includes:
(1) through street traffic capacity model; The described through street traffic capacity comprises the through street main line traffic capacity, through street weaving section capacity and the through street grade separation traffic capacity,
(2) gateway, through street ride comfort model;
(3) through street traffic simulation software;
(4) the auxiliary design proposal comprehensive evaluation model in through street;
Wherein:
(1) described through street traffic capacity model comprises:
The through street main line traffic capacity is calculated, and the maximum service volume of i level service level and unidirectional track design capacity under the ideal conditions are expressed as respectively:
MSV
i＝C
B×(V/C)
i (1)
In the formula (1):
MSV
i---the maximum service volume of i level service level under the ideal conditions, unit: pcu/h/ln;
C
B---basic capacity, the maximum volume of traffic that can pass through in next track of ideal conditions, unit: pcu/h/ln; The speed flowrate curve that actual measurement obtains according to road traffic, its span is: 1400-2200pcu/h/ln;
(V/C)
i---the ratio of the i level service volume of traffic and basic capacity, according to according to " city expressway design discipline ", its scope of getting is: 0.77-0.91;
Because the traffic on the through street belongs to continuous stream, therefore, unidirectional track design capacity (being the main line traffic capacity) is expressed as:
C
D＝MSV
i×f
N×f
w×f
HV (2)
In the formula (2):
C
D---the one-way pavement design capacity, namely under actual conditions, the maximum service volume that can pass through when adopting i level service level, unit is veh/h;
f
N---the number of track-lines correction factor of one-way pavement, according to the number of track-lines difference, its value is respectively:
Number of track-lines is 1 o'clock, f
N=1;
Number of track-lines is 2 o'clock, f
N=1.95;
Number of track-lines is 3 o'clock, f
N=2.72;
Number of track-lines is 4 o'clock, f
N=3.22;
f
w---lane width and Horizontal Clearance correction factor, according to track layout and both sides, track whether the barrier difference is arranged, its value is as shown in table 1 respectively:
Table 1
Wherein, the unit of Horizontal Clearance and lane width is m;
f
HV---large car is to the correction factor of the traffic capacity,
In the formula (3):
P
HV---the heavy goods vehicles volume of traffic accounts for the number percent of total wheel traffic;
E
HV---heavy goods vehicles is converted into the vehicle conversion factor of minibus, and value is 2.
The through street weaving section capacity, shown in Fig. 5-6, described weaving section capacity is the traffic capacity that forms interwoven region according to the basic setup of interwoven region, that is: from computing machine input end input main line flow, inflow and outflow flow or weaving volume ratio, weaving section length, utilize the following weaving section capacity computation model of demarcating based on traffic flow parameter to draw weaving section capacity:
In the formula (4):
CAP
w---weaving section capacity, unit: vehh
-1
L
w---interwoven region length, unit: m;
VR---weaving volume ratio,
Q in the formula
1The flow of serving as theme, unit is pcu/h; q
1Be that auxilliary road flows into flow, unit is pcu/h; q
2Be that auxilliary road flows out flow, unit is pcu/h;
The weaving section capacity that the weaving section capacity computation model of demarcating based on traffic flow parameter from fanout output obtains.
The through street grade separation traffic capacity, shown in Fig. 5-7, the described through street grade separation traffic capacity is at cloverleaf and two types of grade separations of half cloverleaf semi-directional, form its traffic capacity according to its all directions flow proportional, grade separation critical area weaving volume ratio, that is: from computing machine input end input: grade separation type, critical area weaving volume are than, all directions flow proportional, thus the output grade separation traffic capacity.
(2) draw gateway, described through street ride comfort model by following step:
At first, utilize a plurality of places speed of vehicle detector to gather the speed of key node, the computation model and the road model that in a computer system, comprise smooth-going degree at least, utilize the computation model of described smooth-going degree that the traffic study data are analyzed and handled, finally draw gateway, through street ride comfort model; Its concrete steps are as follows:
Step 2-1, the speed mean square deviation under all kinds of road traffic conditions is carried out traffic study, the distribution situation of analysis speed mean square deviation;
Step 2-2, according to the distribution situation of speed mean square deviation, set up the computation model of smooth-going degree:
y＝e
-αx (5)
In the formula (5):
α is driver's driving performance correlation parameter, and α is that the smooth-going degree value of the speed of a motor vehicle mean square deviation distribution characteristics value correspondence that obtains with factual survey calculates, and α is between 0.05～0.1;
X is the speed mean square deviation, the km/h of unit, and under the situation that blocking the way travel permit spare is determined, the driver drives the mean square deviation that the speed of a motor vehicle distributes, and its value is more little, shows that the ride comfort of this road conditions is more good;
Y is smooth-going degree, and between 0～1, the speed mean square deviation is 0 when smooth-going degree is 1, and this is ideal situation;
The speed variance is more big, and smooth-going degree is more low, and ride comfort is more poor; According to the computation model of this smooth-going degree, determine critical smooth-going degree value, that is: with the smooth-going degree value of the 30 hundredths speed of a motor vehicle mean square deviation correspondences that obtain in the on-site inspection as critical smooth-going degree;
Step 2-3, select traffic simulation software according to the traffic simulation demand, and carry out the parameter calibration of traffic simulation software in conjunction with the field investigation data, the condition of its parameter calibration is: the error between emulation speed of a motor vehicle mean square deviation and the actual measurement speed of a motor vehicle mean square deviation is less than or equal to 5%, and to determine entrance minimum spacing initial value be 100m;
Step 2-4, set up road model and comprise and set up basic road network and determine the input and output parameter;
Described basic road network comprises at least: main road number of track-lines, bypass number of track-lines, gateway canalization form;
Described input parameter comprises at least: main road craspedodrome flow, rate of discharge, inlet flow rate, bypass craspedodrome flow, main road desired speed, bypass desired speed, outlet vehicle critical gap, entrance vehicle critical gap, interwoven region critical gap;
Described output parameter comprises at least: the speed of key node, the average velocity of outlet, the average velocity of entrance, the average velocity of the section of interweaving;
Step 2-5, described a plurality of places speed of vehicle detector is arranged on the key node place, to determine the smooth-going degree of gateway under all kinds of combination situations exactly, wherein, described key node refers to the key position of detection speed, described key node comprises all unique points, that is: deceleration canalization section starting point, outlet starting point, outlet terminal point, entrance starting point, entrance terminal, entry accelerated segment endpoint; In addition, between above-mentioned each key node, be place speed of vehicle detector uniformly at intervals with 10m; In addition, in the upstream and downstream 100m of head and the tail key node scope, be place speed of vehicle detector uniformly at intervals with 25m;
Step 2-6, based on determined road, determine the speed mean square deviation under the highway section state of emulation perfect condition and all kinds of combination situations of emulation respectively;
Step 2-7, according to above-mentioned speed mean square deviation, utilize the smooth-going degree value of smooth-going degree computation model, judge whether this smooth-going degree satisfies critical smooth-going degree requirement, if meet the demands execution in step 2-8; Otherwise, be after the basis increases progressively a step-length, to return step 2-4 with current gateway minimum pitch value, carry out microscopic traffic simulation again; Step-length does not wherein coexist according to the gateway composite type and chooses in 20m～100m scope;
Step 2-8, this moment, corresponding gateway minimum spacing was definite minimum gateway spacing;
Draw the gateway minimum spacing of following different gateways composite type based on ride comfort, unit: m by above-mentioned steps; Be shown in Table 2.
Table 2.
When carrying out gateway ride comfort calculating, composite type according to the auxilliary road speed of a motor vehicle and gateway, directly from the gateway minimum spacing of above-mentioned different combination types, inquire value corresponding, as the minimum spacing recommendation under the optimum ride comfort, and formed gateway, through street ride comfort model, that is: draw the recommendation of the smooth-going degree in gateway under the different condition, see Table 3, shown in table 4, table 5 and the table 6.
It is as follows that the corresponding smooth-going degree of combination is gone into-gone out to table 3.:
It is as follows that table 4. goes out-go into the corresponding smooth-going degree of combination:
It is as follows that table 5. goes out-go out the corresponding smooth-going degree of combination:
It is as follows that the corresponding smooth-going degree of combination is gone into-gone into to table 6.:
Gateway, through street minimum spacing is calculated, and in the realization of reality, also obtains required smooth-going degree in the smooth-going degrees of data storehouse (seeing above-mentioned table 3, table 4, table 5 and table 6) of storage by the inquiry calculated in advance.
Shown in Fig. 5-8, Fig. 5-9 and Fig. 5-10, gateway, described through street minimum spacing design module is under the situation of given gateway type and the speed of a motor vehicle, provide the minimum gateway spacing (seeing Table 2) that satisfies safety, efficient, ride comfort condition, described gateway type comprises out, comes in and goes out, into, go into out four kinds of forms, comprise the separation criteria that provides in the national regulation in the described database file and meet the separation criteria of regional traffic characteristic; That is: from computing machine input end input gateway type, main line design speed, auxilliary road design speed; And choose corresponding standard from the database file of storage unit: best ride comfort value, through street, Tianjin Research on Design recommendation, city expressway design discipline recommendation, Beijing municipal administration institute design recommendation, China's city planning design and research institute design recommendation are exported, and compare with the through street minimum spacing recommendation of computing machine output.
(3) main line that utilizes traffic simulation software to draw described through street is incured loss through delay:
Choosing of traffic simulation software: select the arbitrary money among VISSIM and the SYNCHRO;
The result of traffic simulation comprises at least: main line flow, the main line speed of a motor vehicle, main line are incured loss through delay, oil consumption;
Wherein: the main line delay is:
d＝Lw×3.6/v-Lw×3.6/80 (6)
In the formula (6):
Lw is interwoven region length, and namely according to formula (4) gained of front, its unit is m;
The v speed of a motor vehicle of serving as theme, unit is km/h.
(4) the auxiliary design proposal comprehensive evaluation model in through street:
Comprehensive evaluation model according to the above-mentioned main line that obtains is incured loss through delay, three indexs of the smooth-going degree of the main road traffic capacity and gateway are set up the auxiliary design proposal in through street in designing scoring, has following several situation:
When getting main line delay, three indexs of the smooth-going degree of the main road traffic capacity and gateway as evaluation criterion, the mark of through street design synthesis scoring is:
When getting the main road traffic capacity and gateway two indexs of smooth-going degree as evaluation criterion, the mark of through street design synthesis scoring is:
P＝y(100-a
1-a
2-a
3)+a
1y+a
2q/CAP
w (8)
When getting main line delay and gateway two indexs of smooth-going degree as evaluation criterion, the mark of through street design synthesis scoring is:
When only taking out the smooth-going degree index of entrance as the evaluate alternatives standard:
P＝y(100-a
1-a
2-a
3)+a
1y (10)
In formula (7), formula (8), formula (9) and the formula (10):
P---design the mark of scoring for the through street;
Y---the smooth-going degree in gateway that utilizes gateway, described through street ride comfort model to draw;
D---utilizing main line that described traffic simulation software draws to incur loss through delay or getting that basic main line incurs loss through delay is 10; Unit is s;
CAP
w---weaving section capacity, unit: vehh
-1
a
1, a
2, a
3---calculating parameter, wherein a
1=0-0.20, a
2=0-0.20, a
3=0-0.20; For calculating parameter a
1, a
2, a
3Can carry out manual adjustments, calculating parameter a according to the design needs
1, a
2, a
3The acquiescence value be 0.20,0.20,0.20.
Draw the evaluation result of design proposal according to through street design synthesis scoring mark:
0≤P＜30, the evaluation result of design proposal are general;
30≤P＜60, the evaluation result of design proposal are good;
60≤P≤100, the evaluation result of design proposal are outstanding.
Be an Engineering Projects of through street of the present invention aided design system below
One, login system interface
System master interface, be made up of two parts: the left side at (1) interface is the tabulation of each functional module.(2) right side at interface is the user interface of each functional module.
By double-clicking the corresponding functional module of the left list, can show the user interface of corresponding function module on the right side, interface.
System master interface is shown in Fig. 5-1.
Two, the main line traffic capacity in through street is calculated
Mainly containing following four interfaces forms:
(1) through street pacing items input.The pacing items of main input through street main line comprises: number of track-lines, each lane width, clear, Horizontal Clearance, large car proportion etc. are arranged.Shown in Fig. 5-2, wherein, get large car ratio 0.05, the two-way Four-Lane Road of number of track-lines, no Horizontal Clearance, there is barrier both sides, kerb lane width 3.75.
(2) traffic capacity calculating parameter configuration.Comprise: bicycle road basic capacity get 1700pcu/h/ln, VC than be 0.83, the calculating parameters such as reduction coefficient of track correction factor, lane width correction factor, large car and dolly are configured and reset.Shown in Fig. 5-3:
(3) output traffic capacity result of calculation.Net result is output as each lane capacity and total traffic capacity.The output result comprises two kinds: based on traffic flow parameter demarcate the through street traffic capacity obtain, based on the through street traffic capacity of through street design discipline.The result is shown in Fig. 5-4 in output.
(4) preservation of result of calculation and derivation.After traffic capacity calculating is finished, can click and preserve or derive.Result of calculation is preserved and derived operation.
Saving result can be inquired about at the file record query interface, and carries out and derive and two functions of record deletion.Shown in Fig. 5-5.
Record is derived, and the result of calculation of choosing can be exported under system's place root directory with the txt form.
Three, the through street weaving section capacity calculates
The through street weaving section capacity calculates and mainly contains two parts:
(1) calculating parameter is selected.Main initial conditions has: weaving volume compares, segment length interweaves.
(2) obtain the result: output obtains the weaving section capacity value, shown in Fig. 5-6.
Four, the grade separation traffic capacity in through street is calculated
The through street grade separation traffic capacity is calculated and is mainly contained two parts:
(1) calculating parameter is selected.Main initial conditions has: weaving volume ratio, grade separation type, turning ratio etc.
(2) obtain the result: output obtains grade separation traffic capacity value, shown in Fig. 5-7.
Five, gateway, through street distance computation
Gateway, through street distance computation mainly contains four parts:
(1) calculating parameter is selected.Main initial conditions has: design parameters such as gateway type, main line design speed, the auxilliary road speed of a motor vehicle.Shown in Fig. 5-8.
(2) standard is chosen.Choosing needs the gateway of reference spacing recommendation, such as: best ride comfort value, through street, Tianjin Research on Design recommendation, city expressway design discipline recommendation, Beijing municipal administration institute design recommendation, China's city planning design and research institute design recommendation.The user can select wherein arbitrary or a plurality of standard as the calculating standard of gateway minimum spacing.Shown in Fig. 5-9.
(3) minimum spacing is calculated.Obtain the gateway minimum pitch value of different specification under the corresponding conditions.Gateway distance computation and interface as a result are shown in Fig. 5-10.
(4) result derives.The minimum spacing that calculates is exported under system's place root directory with the txt form.
Six, smooth-going degree calculates and the schemes synthesis scoring
Wherein the basic step of ride comfort evaluation is:
(1) basic initial conditions: the through street main line speed of a motor vehicle, auxilliary road, the through street speed of a motor vehicle, through street main line flow, auxilliary road, through street flow.
(2) result of calculation output: gateway, through street ride comfort.
Design proposal is being carried out in the comprehensive grading, can select main line delay, the traffic capacity (traffic capacity among this embodiment refers to weaving section capacity), three indexs of smooth-going degree to carry out the gateway design and estimate.Wherein smooth-going degree is the acquiescence essential option.It is option that the traffic capacity and main line are incured loss through delay.When input main line flow, acquiescence selects the traffic capacity as index.When importing the delay of the main line speed of a motor vehicle or main line, acquiescence selects main line to incur loss through delay as evaluation index, and wherein weaving section capacity utilizes formula (4) to obtain, and the main line delay utilizes formula (6) to obtain.Shown in Fig. 5-11, the basic step of ride comfort evaluation is:
(1) basic initial conditions, gateway, through street type, through street main line flow, the auxilliary road flow in through street and gateway, through street spacing.
(2) simulation result input: comprise main line flow, the main line speed of a motor vehicle, main line delay, oil consumption etc.Wherein the main line flow is used for calculating the main line traffic capacity, as shown in Equation (4).The main line speed of a motor vehicle is used for calculating main line and incurs loss through delay, and utilizes formula (6) can obtain this main line and incurs loss through delay.
(3) evaluation weight.The evaluation weight ratio that the user can manually arrange each evaluation index (is the calculating parameter a in formula (7), formula (8), formula (9), the formula (10)
1, a
2, a
3).The optional evaluation right weight average of each evaluation index is between 0-20%, and wherein ride comfort, main line delay are 20% with the default basic value of traffic capacity weights, and on this basis, each weight all can adjust upward the amount of 0-20%.
(4) output of evaluation result.System has not only provided comprehensive evaluation result according to calculating, and has provided the result of calculation of ride comfort, main line delay and the main line traffic capacity.According to the index difference of considering, the mark of its scoring can be selected for use from formula (7), formula (8), formula (9) and formula (10).
Shown in Fig. 5-11: go out-go out the type gateway, gateway spacing 450m, auxilliary road flows into flow 300pcu/h, flows out flow 300pcu/h, main line flow 500pcu/h.According to known conditions, obtain smooth-going degree and the comprehensive grading of vehicle in this design proposal, wherein smooth-going degree is 0.38, the main line traffic capacity 3523, both all get 20 the scoring weight, and the comprehensive grading that finally obtains is 45.64 minutes, because 30≤P＜60, therefore, the evaluation result of design proposal is good.
Although top invention has been described in conjunction with figure; but the present invention is not limited to above-mentioned embodiment; above-mentioned embodiment only is schematic; rather than it is restrictive; those of ordinary skill in the art is under enlightenment of the present invention; under the situation that does not break away from aim of the present invention, can also make a lot of distortion, these all belong within the protection of the present invention.
Claims (6)
1. a through street aided design system comprises a through street traffic design platform, and described design platform is a man-machine dialog interface, it is characterized in that: also comprise:
One storage unit, described cell stores has predefined rule and database file;
The definition of described rule comprises that through street traffic capacity model, gateway, through street ride comfort model, through street traffic simulation software and through street assist the design proposal comprehensive evaluation model;
Wherein:
(1) described through street traffic capacity model comprises: the through street main line traffic capacity is calculated, and the maximum service volume of i level service level and unidirectional track design capacity under the ideal conditions are expressed as respectively:
MSV
i=C
B×(V/C)
i (1)
In the formula (1):
MSV
i---the maximum service volume of i level service level under the ideal conditions, unit: pcu/h/ln;
C
B---basic capacity, the maximum volume of traffic that can pass through in next track of ideal conditions, unit: pcu/h/ln;
The speed flowrate curve that actual measurement obtains according to road traffic, its span is: 1400-2200pcu/h/ln;
(V/C)
i---the ratio of the i level service volume of traffic and basic capacity, according to " city expressway design discipline " CJJ129-2009, its scope of getting is: 0.77-0.91;
Because the traffic on the through street belongs to continuous stream, therefore, unidirectional track design capacity, namely the main line traffic capacity is expressed as:
C
D=MSV
i×f
N×f
w×f
HV （2）
In the formula (2):
C
D---the one-way pavement design capacity, namely under actual conditions, the maximum service volume that can pass through when adopting i level service level, unit is veh/h;
f
N---the number of track-lines correction factor of one-way pavement, according to the number of track-lines difference, its value is respectively:
Number of track-lines is 1 o'clock, f
N=1;
Number of track-lines is 2 o'clock, f
N=1.95;
Number of track-lines is 3 o'clock, f
N=2.72;
Number of track-lines is 4 o'clock, f
N=3.22;
f
w---lane width and Horizontal Clearance correction factor, according to track layout and both sides, track whether the barrier difference is arranged, its value is as follows respectively:
As 4 track roads of median strip, there are 2 tracks on every limit, on one side when runway has barrier, f
wFor:
As 4 track roads of median strip, there are 2 tracks on every limit, when there is barrier on the runway both sides, and f
wFor:
As 6 or 8 track roads of median strip, there are 3 or 4 tracks on every limit, on one side when runway has barrier, f
wFor:
As 6 or 8 track roads of median strip, there are 3 or 4 tracks on every limit, when there is barrier on the runway both sides, and f
wFor:
Wherein, the unit of Horizontal Clearance and lane width is m;
f
HV---large car is to the correction factor of the traffic capacity,
In the formula (3):
P
HV---the heavy goods vehicles volume of traffic accounts for the number percent of total wheel traffic;
E
HV---heavy goods vehicles is converted into the vehicle conversion factor of minibus, and value is 2;
(2) draw gateway, described through street ride comfort model by following step:
At first, utilize a plurality of places speed of vehicle detector to gather the speed of key node, the computation model and the road model that in a computer system, comprise smooth-going degree at least, utilize the computation model of described smooth-going degree that the traffic study data are analyzed and handled, finally draw gateway, through street ride comfort model; Its concrete steps are as follows:
Step 2-1, the speed mean square deviation under all kinds of road traffic conditions is carried out traffic study, the distribution situation of analysis speed mean square deviation;
Step 2-2, according to the distribution situation of speed mean square deviation, set up the computation model of smooth-going degree:
y=e
-αx （4）
In the formula (4):
α is driver's driving performance correlation parameter, and α is that the smooth-going degree value of the speed of a motor vehicle mean square deviation distribution characteristics value correspondence that obtains with factual survey calculates, and α is between 0.05～0.1;
X is the speed mean square deviation, the km/h of unit, and under the situation that blocking the way travel permit spare is determined, the driver drives the mean square deviation that the speed of a motor vehicle distributes, and its value is more little, shows that the ride comfort of this road conditions is more good;
Y is smooth-going degree, and between 0～1, the speed mean square deviation is 0 when smooth-going degree is 1, and this is ideal situation;
The speed variance is more big, and smooth-going degree is more low, and ride comfort is more poor; According to the computation model of this smooth-going degree, determine critical smooth-going degree value, that is: with the smooth-going degree value of the 30 hundredths speed of a motor vehicle mean square deviation correspondences that obtain in the on-site inspection as critical smooth-going degree;
Step 2-3, select traffic simulation software according to the traffic simulation demand, and carry out the parameter calibration of traffic simulation software in conjunction with the field investigation data, the condition of its parameter calibration is: the error between emulation speed of a motor vehicle mean square deviation and the actual measurement speed of a motor vehicle mean square deviation is less than or equal to 5%, and to determine entrance minimum spacing initial value be 100m;
Step 2-4, set up road model and comprise and set up basic road network and determine the input and output parameter;
Described basic road network comprises at least: main road number of track-lines, bypass number of track-lines, gateway canalization form;
Described input parameter comprises at least: main road craspedodrome flow, rate of discharge, inlet flow rate, bypass craspedodrome flow, main road desired speed, bypass desired speed, outlet vehicle critical gap, entrance vehicle critical gap, interwoven region critical gap;
Described output parameter comprises at least: the speed of key node, the average velocity of outlet, the average velocity of entrance, the average velocity of the section of interweaving;
Step 2-5, described a plurality of places speed of vehicle detector is arranged on the key node place, to determine the smooth-going degree of gateway under all kinds of combination situations exactly, wherein, described key node refers to the key position of detection speed, described key node comprises all unique points, that is: deceleration canalization section starting point, outlet starting point, outlet terminal point, entrance starting point, entrance terminal, entry accelerated segment endpoint; In addition, between above-mentioned each key node, be place speed of vehicle detector uniformly at intervals with 10m; In addition, in the upstream and downstream 100m of head and the tail key node scope, be place speed of vehicle detector uniformly at intervals with 25m;
Step 2-6, based on determined road, determine the speed mean square deviation under the highway section state of emulation perfect condition and all kinds of combination situations of emulation respectively;
Step 2-7, according to above-mentioned speed mean square deviation, utilize the computation model of smooth-going degree to calculate smooth-going degree value, judge whether this smooth-going degree satisfies critical smooth-going degree requirement, if meet the demands execution in step 2-8; Otherwise, be after the basis increases progressively a step-length, to return step 2-4 with current gateway minimum pitch value, carry out microscopic traffic simulation again; Step-length does not wherein coexist according to the gateway composite type and chooses in 20m～100m scope;
Step 2-8, this moment, corresponding gateway minimum spacing was definite minimum gateway spacing;
Draw the gateway minimum spacing of following different gateways composite type based on ride comfort, unit: m by above-mentioned steps;
When carrying out gateway ride comfort calculating, composite type according to the auxilliary road speed of a motor vehicle and gateway, directly from the gateway minimum spacing of above-mentioned different combination types, inquire value corresponding, as the minimum spacing recommendation under the optimum ride comfort, and formed gateway, through street ride comfort model, that is: draw the recommendation of the smooth-going degree in gateway under the different condition, wherein:
It is as follows to go into-go out the corresponding smooth-going degree of combination:
It is as follows to go out-go into the corresponding smooth-going degree of combination:
It is as follows to go out-go out the corresponding smooth-going degree of combination:
It is as follows to go into-go into the corresponding smooth-going degree of combination:
(3) main line that utilizes traffic simulation software to draw described through street is incured loss through delay:
Choosing of traffic simulation software: select the arbitrary money among VISSIM and the SYNCHRO;
The result of traffic simulation comprises at least: main line flow, the main line speed of a motor vehicle, main line are incured loss through delay, oil consumption;
Wherein: the main line delay is:
d=Lw×3.6/v-Lw×3.6/80 （5）
In the formula (5):
Lw is interwoven region length, and unit is m;
The v speed of a motor vehicle of serving as theme, unit is km/h;
(4) the auxiliary design proposal comprehensive evaluation model in through street:
Comprehensive evaluation model according to the above-mentioned main line that obtains is incured loss through delay, three indexs of the smooth-going degree of the main line traffic capacity and gateway are set up the auxiliary design proposal in through street in designing scoring, has following several situation:
When getting main line delay, three indexs of the smooth-going degree of the main line traffic capacity and gateway as evaluation criterion, the mark of through street design synthesis scoring is:
When getting the main line traffic capacity and gateway two indexs of smooth-going degree as evaluation criterion, the mark of through street design synthesis scoring is:
P=y(100-a
1-a
2-a
3)+a
1y+a
2q/CAP
w （7）
When getting main line delay and gateway two indexs of smooth-going degree as evaluation criterion, the mark of through street design synthesis scoring is:
When only taking out the smooth-going degree index of entrance as the evaluate alternatives standard:
P=y(100-a
1-a
2-a
3)+a
1y （9）
In formula (6), formula (7), formula (8) and the formula (9):
L---interwoven region length;
Q---the main line magnitude of traffic flow;
P---design the mark of scoring for the through street;
Y---the smooth-going degree in gateway that utilizes gateway, described through street ride comfort model to draw;
D---utilizing main line that described traffic simulation software draws to incur loss through delay or getting that basic main line incurs loss through delay is 10; Unit is s;
CAP
w---weaving section capacity, unit: vehh
-1
a
1, a
2, a
3---calculating parameter, wherein a
1=0-0.20, a
2=0-0.20, a
3=0-0.20;
Draw the evaluation result of design proposal according to through street design synthesis scoring mark:
0≤P＜30, the evaluation result of design proposal are general;
30≤P＜60, the evaluation result of design proposal are good;
60≤P≤100, the evaluation result of design proposal are outstanding;
The recommendation database, through street, Tianjin Research on Design recommendation database, city expressway design discipline recommendation database, Beijing municipal administration institute design recommendation database, the China's city planning design and research institute design recommendation database that comprise the gateway ride comfort in the described database file;
Through street traffic capacity module is used for drawing this through street traffic capacity according to the basic parameter of one group of given through street and the through street traffic capacity model of described storage unit;
Gateway minimum spacing design module is for the design of finishing according to gateway, the through street ride comfort model of one group of given gateway composite type, main line design speed, the auxilliary road speed of a motor vehicle and described storage unit based on the gateway minimum spacing of ride comfort;
The through street main line is incured loss through delay module, is used for drawing this through street main line delay according to the traffic simulation software of one group of given main road craspedodrome flow, rate of discharge, inlet flow rate, bypass craspedodrome flow, main road desired speed, bypass desired speed, main road car accident rate, main road vehicle composition, main road stop public transit vehicle flow and described storage unit;
The design synthesis evaluation module is assisted in the through street, the design result of the above-mentioned through street traffic capacity that draws and gateway minimum spacing and the gateway ride comfort in the described storage unit and through street main line are incured loss through delay the design proposal that constitutes carry out comprehensive grading, thereby draw the evaluation result of this through street design proposal.
2. through street according to claim 1 aided design system, it is characterized in that: draw the through street main line traffic capacity, through street weaving section capacity and the through street grade separation traffic capacity by described through street traffic capacity module, and above-mentioned each traffic capacity data are recorded in the database file of storage unit.
3. through street according to claim 2 aided design system, it is characterized in that: the described through street main line traffic capacity is the basic setup according to the through street, the output through street traffic capacity, that is: from input end and computer input number of track-lines, lane width, clear is arranged, Horizontal Clearance, large car proportion data, and to bicycle road basic capacity, the VC ratio, the track correction factor, the lane width correction factor, the reduction coefficient of large car and dolly is demarcated, thus output based on through street traffic flow parameter calibration result and based on the through street traffic capacity of through street design discipline.
4. through street according to claim 2 aided design system, it is characterized in that: described weaving section capacity is the traffic capacity that forms interwoven region according to the basic setup of interwoven region, that is: from computing machine input end input main line flow, inflow and outflow flow or weaving volume ratio, weaving section length, utilize the following weaving section capacity computation model of demarcating based on traffic flow parameter to draw weaving section capacity:
In the formula (10):
CAP
w---weaving section capacity, unit: vehh
-1
L
w---interwoven region length, unit: m;
VR---weaving volume ratio,
Q in the formula
1The flow of serving as theme, unit is pcu/h; q
1Be that auxilliary road flows into flow, unit is pcu/h; q
2Be that auxilliary road flows out flow, unit is pcu/h;
The weaving section capacity that the weaving section capacity computation model of demarcating based on traffic flow parameter from fanout output obtains.
5. through street according to claim 2 aided design system, it is characterized in that: the described through street grade separation traffic capacity is at cloverleaf and two types of grade separations of half cloverleaf semi-directional, form its traffic capacity according to its all directions flow proportional, grade separation critical area weaving volume ratio, that is: import from input end and computer: grade separation type, critical area weaving volume ratio, all directions flow proportional, thereby the output grade separation traffic capacity.
6. through street according to claim 1 aided design system, it is characterized in that: gateway, described through street minimum spacing design module is under the situation of given gateway type and the speed of a motor vehicle, provide the minimum gateway spacing that satisfies safety, efficient, ride comfort condition, described gateway type comprises out, comes in and goes out, into, go into out four kinds of forms, comprise the separation criteria that provides in the national regulation in the described database file and meet the separation criteria of regional traffic characteristic; That is: from computing machine input end input gateway type, main line design speed, auxilliary road design speed; And choose corresponding standard from the database file of storage unit: best ride comfort value, through street, Tianjin Research on Design recommendation, city expressway design discipline recommendation, Beijing municipal administration institute design recommendation, China's city planning design and research institute design recommendation are exported, and compare with the through street minimum spacing recommendation of computing machine output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110107871 CN102201021B (en) | 2011-04-27 | 2011-04-27 | Expressway aided design system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110107871 CN102201021B (en) | 2011-04-27 | 2011-04-27 | Expressway aided design system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102201021A CN102201021A (en) | 2011-09-28 |
| CN102201021B true CN102201021B (en) | 2013-09-04 |
Family
ID=44661695
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110107871 Active CN102201021B (en) | 2011-04-27 | 2011-04-27 | Expressway aided design system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102201021B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103456163B (en) * | 2012-06-04 | 2015-12-02 | 北京市市政工程设计研究总院有限公司 | The city expressway interchange traffic capacity and running status method of discrimination and system |
| CN103871241B (en) * | 2014-03-19 | 2016-04-06 | 同济大学 | One dynamically divides control method towards track, Weaving Sections of Urban Expressway |
| CN104809870A (en) * | 2015-04-10 | 2015-07-29 | 安徽四创电子股份有限公司 | Viaduct entrance ramp traffic congestion grade estimation method |
| CN109345040A (en) * | 2018-11-14 | 2019-02-15 | 阿里巴巴集团控股有限公司 | The determination method and device of public transport through street |
| CN110184867A (en) * | 2019-06-10 | 2019-08-30 | 葛志凯 | Alleviate traffic congestion and reduces the roading method and system of vehicle exhaust emission |
| CN111199645A (en) * | 2020-01-10 | 2020-05-26 | 西南交通大学 | Traffic flow organization optimization method for urban expressway intersection area |
| CN112150809B (en) * | 2020-09-25 | 2021-09-10 | 哈尔滨工业大学 | Urban expressway short-distance travel control method |
| CN114384823B (en) * | 2022-03-23 | 2022-06-21 | 智能网联汽车(山东)协同创新研究院有限公司 | Simulated road simulation test system based on intelligent networked automobile |
| CN115547057B (en) * | 2022-12-01 | 2023-03-07 | 南京大学 | Road interlacing behavior recognition and rationality analysis method by means of navigation data |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201218988Y (en) * | 2008-03-20 | 2009-04-08 | 天津市市政工程设计研究院 | Collection system for characteristic parameter of urban fast road intercommunicated intersection traffic flow |
| CN101246513A (en) * | 2008-03-20 | 2008-08-20 | 天津市市政工程设计研究院 | City fast road intercommunicated overpass simulation design system and selection method |
| CN101685471B (en) * | 2008-09-26 | 2011-11-23 | 黑龙江工程学院 | Highway route CAD aided design system |
-
2011
- 2011-04-27 CN CN 201110107871 patent/CN102201021B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN102201021A (en) | 2011-09-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102201021B (en) | Expressway aided design system | |
| CN101246514B (en) | City fast road intercommunicated overpass simulation design system and method for establishing design model | |
| CN102592447B (en) | Method for judging road traffic state of regional road network based on fuzzy c means (FCM) | |
| Klobucar et al. | Network evaluation tool to improve real and perceived bicycle safety | |
| Weinert et al. | Electric two-wheelers in China: effect on travel behavior, mode shift, and user safety perceptions in a medium-sized city | |
| McLean | Two-lane highway traffic operations: Theory and practice | |
| CN101246513A (en) | City fast road intercommunicated overpass simulation design system and selection method | |
| CN104778834A (en) | Urban road traffic jam judging method based on vehicle GPS data | |
| CN101826258B (en) | Method for predicting simple accidents on freeways | |
| CN104809112A (en) | Method for comprehensively evaluating urban public transportation development level based on multiple data | |
| CN104732075A (en) | Real-time prediction method for urban road traffic accident risk | |
| CN106710216A (en) | Expressway real-time traffic jam road condition detection method and system | |
| CN102360530B (en) | Method for checking speed consistency for basic road sections of collection and distribution harbors of port | |
| CN104091440B (en) | Based on the urban traffic blocking Cost Estimation of category of roads and type of vehicle | |
| CN103632535B (en) | Judgment method for section pedestrian crossing signal lamp arrangement | |
| CN106530763A (en) | Supersaturation traffic adaptive signal control method with coupling of inlet flow and outlet flow | |
| Linzer et al. | Effect of trucks, buses, and recreational vehicles on freeway capacity and service volume | |
| CN102254425A (en) | Speed-correcting stable modeling method for discrete model of macroscopic traffic flow | |
| Zhao et al. | Research on campus bike path planning scheme evaluation based on TOPSIS method: Wei'shui campus bike path planning as an example | |
| Wigan | Motorcycles as a full mode of transportation | |
| CN102314771B (en) | Method for determining minimum distance of fast road exit/entrance based on smoothness analysis | |
| CN108320083A (en) | The pure electric bus operational characteristic evaluation method that qualitative and quantitative target is combined | |
| CN101866549A (en) | Micro indicator and evaluation method of regional transportation service level | |
| CN102609625B (en) | A kind of outskirts of a town expressway entrance and exit ring road bit selecting method | |
| Ober-Sundermeier et al. | Prediction of congestion due to road works on freeways |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 300051 No. 239, Yingkou Road, Heping District, Tianjin Patentee after: Tianjin municipal engineering design and Research Institute Co.,Ltd. Address before: 300051 No. 239, Yingkou Road, Heping District, Tianjin Patentee before: TIANJIN MUNICIPAL ENGINEERING DESIGN & Research Institute |