CN103714706B - A kind of traffic induction method - Google Patents
A kind of traffic induction method Download PDFInfo
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- CN103714706B CN103714706B CN201310747373.0A CN201310747373A CN103714706B CN 103714706 B CN103714706 B CN 103714706B CN 201310747373 A CN201310747373 A CN 201310747373A CN 103714706 B CN103714706 B CN 103714706B
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Abstract
The present invention relates to a kind of traffic induction method, the method comprises: when congestion information that is periodic or section occurs to upgrade, respectively following step is performed to each main roads corridor: to each crossing, backtracking sets the congestion information of this crossing in duration from current time, congestion information according to this crossing traced back to judges whether this crossing is bottleneck congestion points, and records result of determination; The result of determination of traversal to each crossing, finds out the main traffic thoroughfare this main roads corridor existing bottleneck congestion points; Determine that the ratio of the journey time of the circuit that detours on the main traffic thoroughfare found out and the journey time on this main traffic thoroughfare exceeds proportion threshold value, generate the first induction information and issue.Traffic induction method of the present invention, can judge road grid traffic situation fast and accurately, and then realizes real-time traffic induction.
Description
Technical field
The present invention relates to intelligent transportation field, especially a kind of traffic induction method.
Background technology
Traffic guidance is based on electronics, computing machine, network and the modern technologies such as to communicate, and helps road user to find optimal path from starting point to destination by Real-time Traffic Information.Be characterized in that a people, car, road integrate consideration, road traffic system is improved by inducing the travel behaviour of road user, prevent the generation of traffic jam, reduce the residence time of vehicle on road, and finally realize the reasonable distribution of traffic flow in road network on each section.
The key realizing traffic guidance comprehensively to form each section of road network, the transport information of each crossing, judges road grid traffic situation fast and accurately, and then generate induction information according to road grid traffic situation.And realize traffic induction method at present and mostly set about judging road grid traffic situation from analysis section with crossing and associating between crossing with crossing, the quantity of information of operand and process is comparatively large, can not meet the requirement of traffic guidance real-time.
Summary of the invention
In view of this, fundamental purpose of the present invention is to provide a kind of traffic induction method, can judge road grid traffic situation fast and accurately, and then realizes real-time traffic induction.
For achieving the above object, technical scheme of the present invention is as follows:
When congestion information that is periodic or section occurs to upgrade, respectively following step is performed to each main roads corridor:
Perform each crossing respectively: recall the congestion information setting crossing in duration from current time, the congestion information according to this crossing traced back to judges whether this crossing is bottleneck congestion points, and records result of determination;
The result of determination of traversal to each crossing, finds out the main traffic thoroughfare this main roads corridor existing bottleneck congestion points; Determine that the ratio of the journey time of the circuit that detours on the main traffic thoroughfare found out and the journey time on this main traffic thoroughfare exceeds proportion threshold value, generate the first induction information and issue; Wherein, described first induction information comprises bypass route.
Preferably, the congestion information that described backtracking sets crossing in duration from current time is specially:
The congestion information of crossing is determined according to the congestion information in section, and the congestion information of the determined crossing of corresponding record and determine moment of congestion information of this crossing;
Inquire about the moment of the congestion information of this crossing of determination of recording, find out each moment in the setting duration to current time, the congestion information of this crossing that the moment found out is corresponding is the congestion information setting this crossing of recording in duration from current time.
Preferably, the described span of duration that sets is as [5min, 60min]; The span of described proportion threshold value is (1, ∞).
Preferably, the method also comprises: when main traffic thoroughfare does not exist bottleneck congestion points, or, there is bottleneck congestion points, but when the ratio of the journey time of the circuit that detours on main traffic thoroughfare and the journey time on this main traffic thoroughfare does not exceed proportion threshold value, the method also comprises:
Generate the second induction information or the 3rd induction information, and issue the induction information of this generation; Wherein, described second induction information comprises the position of bottleneck congestion points; Described 3rd induction information comprises the prompting that there is congestion points.
Preferably, the congestion information in described section is the journey time in section; Accordingly,
The congestion information of described crossing is the delay time at stop of crossing;
Described judge this crossing be whether bottleneck congestion points as:
According to moment corresponding to the delay time at stop of this recorded crossing by the order after arriving first, by the delay time at stop sequence of this crossing traced back to, be designated as: T
ir, r=1,2 ..., [setting duration/T]-1, [setting duration/T]; Wherein, r is the sequence number of the delay time at stop of this crossing; T
irfor the delay time at stop of crossing i; [] is for rounding; T is the cycle of carrying out traffic guidance, or the time interval of renewal occurs the congestion information in section; In the sequence of the delay time at stop of this crossing,
Calculate T
irwith the ratio of the speed limit journey time of crossing i;
If T
irwith the increase monotone increasing of r, and when the number exceeding the ratio of predetermined threshold value in the ratio calculated is greater than setting number, think that this crossing is bottleneck congestion points; Otherwise this crossing is not bottleneck congestion points;
Wherein, the span of described preset number is [2,30]; The span of described predetermined threshold value is [1.5,5].
Preferably, the congestion information in described section is the congestion index in section; Accordingly,
The congestion information of described crossing is the congestion index of crossing;
The described congestion information according to section determines that the congestion information of crossing is specially: perform step respectively to Shang Ge crossing, main roads corridor: get the maximal value in the congestion index of each entrance driveway of crossing, as the congestion index of this crossing;
The congestion information of the determined crossing of described corresponding record and determine that moment of congestion information of this crossing is: the congestion index of the determined crossing of corresponding record and determine moment of congestion index of this crossing, and the entrance driveway maximum with the congestion index of this crossing of congestion index corresponding record of determined crossing;
Accordingly, described judge this crossing be whether bottleneck congestion points as:
According to moment corresponding to the congestion index of this recorded crossing by the order after arriving first, by the congestion index sequence of this crossing traced back to, be designated as: d
ik, k=1,2 ..., [setting duration/T]-1, [setting duration/T]; Wherein, k is the sequence number of the congestion index of this crossing; d
ikfor the congestion index of crossing i; [] is for rounding; T is the cycle of carrying out traffic guidance, or the time interval of renewal occurs the congestion information in section; In the sequence of the congestion index of this crossing,
If d
ikincrease with k does not reduce, d
ikall be greater than the threshold value of blocking up pre-set, and determine and d
ikthe entrance driveway that corresponding each congestion index is maximum is same entrance driveway, thinks that this crossing is bottleneck congestion points; Otherwise this crossing is not bottleneck congestion points;
Wherein, the span of threshold value of blocking up described in is [0.6,1].
Preferably, when the congestion information of described crossing is delay time at stop or the congestion index of crossing, the method also comprises:
In advance the span of the congestion information of crossing is divided into multiple jam level;
Differentiate the jam level that the congestion information of determined each crossing is corresponding respectively;
The jam level of each crossing and congestion information are labeled on position corresponding with this crossing on map accordingly, the standard of mark is: the jam level of each crossing and congestion information are all expressed as two concentrically ringed forms, jam level is represented with the fill color of roundlet, a kind of fill color of the corresponding roundlet of jam level every grade, the size of the annular region between two concentric circless represents congestion information;
Map sent to traffic control center or be distributed on induced screen.
Preferably, when the congestion information of described crossing is delay time at stop and the congestion index of crossing, the method also comprises:
In advance the span of the delay time at stop of crossing is divided into multiple jam level;
Differentiate the jam level that the delay time at stop of determined each crossing is corresponding respectively;
The jam level of each crossing and delay time at stop are labeled on position corresponding with this crossing on map accordingly, the standard of mark is: the jam level of each crossing and delay time at stop are all expressed as two concentrically ringed forms, jam level is represented with the fill color of roundlet, a kind of fill color of the corresponding roundlet of jam level every grade, the size of the annular region between two concentric circless represents the delay time at stop;
Map sent to traffic control center or be distributed on induced screen; Or,
In advance the span of the delay time at stop of crossing is divided into multiple jam level;
Differentiate the jam level that the delay time at stop of determined each crossing is corresponding respectively;
The jam level of each crossing and congestion index are labeled on position corresponding with this crossing on map accordingly, the standard of mark is: the jam level of each crossing and congestion index are all expressed as two concentrically ringed forms, jam level is represented with the fill color of roundlet, a kind of fill color of the corresponding roundlet of jam level every grade, the size of the annular region between two concentric circless represents congestion index;
Map sent to traffic control center or be distributed on induced screen; Or,
In advance the span of the congestion index of crossing is divided into multiple jam level;
Differentiate the jam level that the congestion index of determined each crossing is corresponding respectively;
The jam level of each crossing and congestion index are labeled on position corresponding with this crossing on map accordingly, the standard of mark is: the jam level of each crossing and congestion index are all expressed as two concentrically ringed forms, jam level is represented with the fill color of roundlet, a kind of fill color of the corresponding roundlet of jam level every grade, the size of the annular region between two concentric circless represents congestion index;
Map sent to traffic control center or be distributed on induced screen; Or,
In advance the span of the congestion index of crossing is divided into multiple jam level;
Differentiate the jam level that the congestion index of determined each crossing is corresponding respectively;
The jam level of each crossing and delay time at stop are labeled on position corresponding with this crossing on map accordingly, the standard of mark is: the jam level of each crossing and congestion index are all expressed as two concentrically ringed forms, jam level is represented with the fill color of roundlet, a kind of fill color of the corresponding roundlet of jam level every grade, the size of the annular region between two concentric circless represents the delay time at stop;
Map sent to traffic control center or be distributed on induced screen.
Preferably, the described span by the delay time at stop of crossing is divided into multiple jam level and is specially:
The span of delay time at stop is divided into [0,10s], (10s, 35s], (35s, 60s], (60s, ∞), the one-level of four interval corresponding jam level is respectively to level Four; Wherein, one-level is unimpeded, and secondary is for slightly to block up, and three grades are blocked up for medium, and level Four is heavy congestion;
The described span by the congestion index of crossing is divided into multiple jam level and is specially:
The span of the congestion index of crossing is divided into interval [0,0.4), [0.4,0.6), [0.6,1], the one-level of three interval corresponding jam level is respectively to three grades; Wherein, one-level is unimpeded, and secondary is jogging, and three grades are blocked up; Or,
The span of the congestion index of crossing is divided into interval [0,0.2), [0.2,0.4), [0.4,0.6), [0.6,0.8), [0.8,1], the one-level of five interval corresponding jam level is respectively to Pyatyi; Wherein, one-level is very unimpeded, and secondary is unimpeded, three grades for slightly to block up, level Four is that moderate is blocked up, Pyatyi is heavy congestion.
Based on above-mentioned, traffic induction method provided by the invention, has the following advantages and feature:
1, first from time angle analysis, bottleneck congestion points is determined; Again from space angle, determine whether bottleneck congestion points by the crossing on traversal each main traffic thoroughfare, main roads corridor, judged the traffic in main roads corridor, and then generated induction information; Operand is less with the quantity of information related to, and can judge road grid traffic situation fast and accurately, and then realizes real-time traffic induction;
2, the overall road conditions according to main roads corridor generate induction information, avoid according to road conditions among a small circle carry out that traffic guidance may cause among a small circle between path resource coordinate bad problem; And the ratio of the journey time of the circuit that detours on the main traffic thoroughfare found out and the journey time on this main traffic thoroughfare advises detouring when not exceeding proportion threshold value, the pressure on main traffic thoroughfare can be extenuated timely and effectively, avoid the rapid spread that blocks up, cause the deadlock of local or whole city road network or stagnant speed operation on a large scale;
3, on map, the jam situation of crossing is marked with concentric circles, both jam level can be marked out, and for the identical crossing of jam level, its congestion level can also be distinguished further by the size of the annular region between two concentric circless, make driver or traffic controller can obtain more definite jam situation intuitively from map, convenient trip and traffic administration.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of the embodiment of the present invention one traffic induction method.
Embodiment
Concrete, the realization flow of the embodiment of the present invention one traffic induction method as shown in Figure 1, comprise periodically or the congestion information in section occurs to upgrade time, respectively step 101 ~ 103 are performed to each main roads corridor:
Step 101: respectively each crossing is performed: recall the congestion information setting crossing in duration from current time; Congestion information according to this crossing traced back to judges whether this crossing is bottleneck congestion points, and records result of determination;
Step 102: travel through the result of determination to each crossing, finds out the main traffic thoroughfare this main roads corridor existing bottleneck congestion points;
Step 103: determine that the ratio of the journey time of the circuit that detours on the main traffic thoroughfare found out and the journey time on this main traffic thoroughfare exceeds proportion threshold value, then generate the first induction information and issue; Wherein, described first induction information comprises bypass route.
Wherein,
Described periodicity is: with 1min, 2min, 5min, 10min or 15min for the cycle.
In step 101,
The described span of duration that sets is as [5min, 60min];
Described backtracking sets the congestion information of crossing in duration from current time, is specially:
The congestion information of crossing is determined according to the congestion information in section, and the congestion information of the determined crossing of corresponding record and determine moment of congestion information of this crossing;
Inquire about the moment of the congestion information of this crossing of determination of recording, find out each moment in the setting duration to current time, the congestion information of this crossing that the moment found out is corresponding is the congestion information setting this crossing of recording in duration from current time.
Wherein,
The congestion information in described section comprises journey time and/or the congestion index in section; Accordingly, the congestion information of described crossing comprises delay time at stop and/or the congestion index of crossing;
Accordingly, the congestion information of the described Shang Ge crossing, congestion information determination main roads corridor according to section comprises: delay time at stop and/or the congestion index of determining each crossing; Wherein,
Describedly determine that the congestion index of each crossing is specially:
Get the maximal value in the congestion index of each entrance driveway of this crossing, as the congestion index of this crossing;
Accordingly, the congestion information of the determined crossing of described corresponding record and determine that moment of congestion information of this crossing is: the congestion index of the determined crossing of corresponding record and determine moment of congestion index of this crossing, and the entrance driveway maximum with the congestion index of this crossing of congestion index corresponding record of determined crossing;
Describedly determine that the delay time at stop of each crossing is:
Calculate the mean value of the delay time at stop of each entrance driveway in this crossing, as the delay time at stop of this crossing, be formulated as:
Wherein, i represents crossing; J represents the entrance driveway of crossing i; J
irepresent the number of the entrance driveway j of crossing i; T
ijrepresent the journey time of the entrance driveway j of crossing i; T
0ijrepresent the speed limit journey time of the entrance driveway j of crossing i; T
irepresent the journey time of crossing i; Or,
Get the maximal value in the journey time of each entrance driveway of this crossing, as the journey time of this crossing.
When the congestion information of described crossing is the delay time at stop of crossing, described judge this crossing be whether bottleneck congestion points as:
According to moment corresponding to the delay time at stop of this recorded crossing by the order after arriving first, by the delay time at stop sequence of this crossing traced back to, namely to determine the order sequence of the delay time at stop of this crossing, be designated as: T
ir, r=1,2 ..., [setting duration/T]-1, [setting duration/T]; Wherein, r is the sequence number of the delay time at stop of this crossing, and r is larger, determines T
irmoment and time interval of current time less; T
irfor the delay time at stop of crossing i; [] is for rounding; T is the cycle of carrying out traffic guidance, or the time interval of renewal occurs the congestion information in section; In the sequence of the delay time at stop of this crossing,
Calculate T
irwith the ratio of the speed limit journey time of crossing i;
If T
irwith the increase monotone increasing of r, and when the number exceeding the ratio of predetermined threshold value in the ratio calculated is greater than setting number, think that this crossing is bottleneck congestion points; Otherwise this crossing is not bottleneck congestion points;
Wherein, the span of described preset number is [2,30]; The span of described predetermined threshold value is [1.5,5].
When the congestion information of described crossing is the congestion index of crossing, described judge this crossing be whether bottleneck congestion points as:
According to moment corresponding to the congestion index of this recorded crossing by the order after arriving first, by the congestion index sequence of this crossing traced back to, be designated as: d
ik, k=1,2 ..., [setting duration/T]-1, [setting duration/T]; Wherein, k is the sequence number of the congestion index of this crossing; d
ikfor the congestion index of crossing i; [] is for rounding; T is the cycle of carrying out traffic guidance, or the time interval of renewal occurs the congestion information in section; In the sequence of the congestion index of this crossing,
If d
ikincrease with k does not reduce, d
ikall be greater than the threshold value of blocking up pre-set, and determine and d
ikthe entrance driveway that corresponding each congestion index is maximum is same entrance driveway, thinks that this crossing is bottleneck congestion points; Otherwise this crossing is not bottleneck congestion points;
Wherein, the span of threshold value of blocking up described in is [0.6,1].
In step 103, the span of described proportion threshold value is (1, ∞), and preferably, described proportion threshold value is 1.5;
Described first induction information is issued by the induced screen or GPS navigation being arranged at routing position.
In embodiments of the present invention:
Described main roads corridor, the localized road network that to refer to or substantially identical main traffic thoroughfare, city, several directions be skeleton.The possibility rapid spread that blocks up on main traffic thoroughfare, causes the deadlock of local or whole city road network or stagnant speed operation on a large scale, therefore, can arrange corresponding bypass route when design city road network to each main traffic thoroughfare.Routing position, refers to the location point can selecting different main traffic thoroughfare or its corresponding bypass route when wagon flow enters main roads corridor.
Embodiment two
Being distinguished as of the traffic induction method of the present embodiment and embodiment one:
When there is not bottleneck congestion points in main traffic thoroughfare, or, there is bottleneck congestion points, but when the ratio of the journey time of the circuit that detours on main traffic thoroughfare and the journey time on this main traffic thoroughfare does not exceed proportion threshold value, the traffic induction method of the embodiment of the present invention also comprises:
Generate the second induction information or the 3rd induction information, and issue the induction information of this generation; Wherein, described second induction information comprises the position of bottleneck congestion points; Described 3rd induction information comprises the prompting that there is congestion points.Wherein,
First induction information also comprises: the position of bottleneck congestion points, the congestion information etc. of crossing; Second induction information also comprises the delay time at stop of bottleneck congestion points; In three class induction informations, the 3rd class induction information is the simplest, minimum to the routing influence degree of driver, and the information that first kind induction information comprises is then comparatively comprehensive, the highest to the routing influence degree of driver.
Except above-mentioned difference, all the other realization flows of the present embodiment are identical with the realization flow of embodiment one.
The embodiment of the present invention three
Being distinguished as of the traffic induction method of the present embodiment and embodiment one or embodiment two: except the realization flow of traffic induction method comprising embodiment one or embodiment two, the traffic induction method of the embodiment of the present invention also comprises:
The congestion information of determined crossing is labeled on position corresponding with each crossing respectively on map accordingly, and map is sent to traffic control center or be distributed on induced screen.
Concrete, described being labeled in accordingly on map by congestion information comprises:
A1, in advance the span of delay time at stop is divided into [0,10s], (10s, 35s], (35s, 60s], (60s, ∞), the one-level of four interval corresponding jam level is respectively to level Four; Wherein, one-level is unimpeded, and secondary is for slightly to block up, and three grades are blocked up for medium, and level Four is heavy congestion;
B1, differentiate the interval belonging to the delay time at stop of determined each crossing respectively, determined interval corresponding jam level is the jam level of this crossing;
C1, the jam level of each crossing and congestion index are labeled on position corresponding with this crossing on map accordingly, the standard of mark is: the jam level of each crossing and congestion index are all expressed as two concentrically ringed forms, jam level is represented with the fill color of roundlet, the one-level of jam level is to a kind of fill color of each corresponding roundlet of level Four, the corresponding green of one-level, the corresponding yellow of secondary, three grades of corresponding oranges, the corresponding redness of level Four, the size of the annular region between two concentric circless represents congestion index; Or,
A2, in advance the span of delay time at stop is divided into [0,10s], (10s, 35s], (35s, 60s], (60s, ∞), the one-level of four interval corresponding jam level is respectively to level Four; Wherein, one-level is unimpeded, and secondary is for slightly to block up, and three grades are blocked up for medium, and level Four is heavy congestion;
B2, differentiate the interval belonging to the delay time at stop of determined each crossing respectively, determined interval corresponding jam level is the jam level of this crossing;
C2, the jam level of each crossing and delay time at stop are labeled on position corresponding with this crossing on map accordingly, the standard of mark is: the jam level of each crossing and delay time at stop are all expressed as two concentrically ringed forms, jam level is represented with the fill color of roundlet, the one-level of jam level is to a kind of fill color of each corresponding roundlet of level Four, the corresponding green of one-level, the corresponding yellow of secondary, three grades of corresponding oranges, the corresponding redness of level Four, the size of the annular region between two concentric circless represents the delay time at stop; Or,
A3, in advance the span of the congestion index of crossing is divided into interval [0,0.4), [0.4,0.6), [0.6,1], the one-level of three interval corresponding jam level is respectively to three grades; Wherein, one-level is unimpeded, and secondary is jogging, and three grades are blocked up;
B3, differentiate the interval belonging to congestion index of determined each crossing respectively, determined interval corresponding jam level is the jam level of this crossing;
C3, the jam level of each crossing and delay time at stop are labeled on position corresponding with this crossing on map accordingly, the standard of mark is: the jam level of each crossing and delay time at stop are all expressed as two concentrically ringed forms, the fill color of roundlet represents jam level, the one-level of jam level is to a kind of fill color of three grades of each corresponding roundlets, the corresponding green of one-level, the corresponding yellow of secondary, three grades of corresponding redness, the size of the annular region between two concentric circless represents the delay time at stop; Or,
A4, in advance the span of the congestion index of crossing is divided into interval [0,0.4), [0.4,0.6), [0.6,1], the one-level of three interval corresponding jam level is respectively to three grades; Wherein, one-level is unimpeded, and secondary is jogging, and three grades are blocked up;
B4, differentiate the interval belonging to congestion index of determined each crossing respectively, determined interval corresponding jam level is the jam level of this crossing;
C4, the jam level of each crossing and congestion index are labeled on position corresponding with this crossing on map accordingly, the standard of mark is: the jam level of each crossing and congestion index are all expressed as two concentrically ringed forms, the fill color of roundlet represents jam level, the one-level of jam level is to a kind of fill color of three grades of each corresponding roundlets, the corresponding green of one-level, the corresponding yellow of secondary, three grades of corresponding redness, the size of the annular region between two concentric circless represents congestion index; Or,
A5, in advance the span of the congestion index of crossing is divided into interval [0,0.2), [0.2,0.4), [0.4,0.6), [0.6,0.8), [0.8,1], the one-level of five interval corresponding jam level is respectively to Pyatyi; Wherein, one-level is very unimpeded, and secondary is unimpeded, three grades for slightly to block up, level Four is that moderate is blocked up, Pyatyi is heavy congestion;
B5, differentiate the interval belonging to congestion index of determined each crossing respectively, determined interval corresponding jam level is the jam level of this crossing;
C5, the jam level of each crossing and delay time at stop are labeled on position corresponding with this crossing on map accordingly, the standard of mark is: the jam level of each crossing and delay time at stop are all expressed as two concentrically ringed forms, the fill color of roundlet represents jam level, the one-level of jam level is to a kind of fill color of each corresponding roundlet of Pyatyi, the corresponding green of one-level, the corresponding blueness of secondary, three grades of corresponding yellow, the corresponding redness of the corresponding orange of level Four, Pyatyi, the size of the annular region between two concentric circless represents the delay time at stop; Or,
A6, in advance the span of the congestion index of crossing is divided into interval [0,0.2), [0.2,0.4), [0.4,0.6), [0.6,0.8), [0.8,1], the one-level of five interval corresponding jam level is respectively to Pyatyi; Wherein, one-level is very unimpeded, and secondary is unimpeded, three grades for slightly to block up, level Four is that moderate is blocked up, Pyatyi is heavy congestion;
B6, differentiate the interval belonging to congestion index of determined each crossing respectively, determined interval corresponding jam level is the jam level of this crossing;
C6, the jam level of each crossing and congestion index are labeled on position corresponding with this crossing on map accordingly, the standard of mark is: the jam level of each crossing and congestion index are all expressed as two concentrically ringed forms, the fill color of roundlet represents jam level, the one-level of jam level is to a kind of fill color of each corresponding roundlet of Pyatyi, the corresponding green of one-level, the corresponding blueness of secondary, three grades of corresponding yellow, the corresponding redness of the corresponding orange of level Four, Pyatyi, the size of the annular region between two concentric circless represents congestion index.
The above, be only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention.
Claims (9)
1. a traffic induction method, is characterized in that, when congestion information that is periodic or section occurs to upgrade, performs following step respectively to each main roads corridor:
Perform each crossing respectively: recall the congestion information setting crossing in duration from current time, the congestion information according to this crossing traced back to judges whether this crossing is bottleneck congestion points, and records result of determination;
The result of determination of traversal to each crossing, finds out the main traffic thoroughfare this main roads corridor existing bottleneck congestion points; Determine that the ratio of the journey time of the circuit that detours on the main traffic thoroughfare found out and the journey time on this main traffic thoroughfare exceeds proportion threshold value, generate the first induction information and issue;
Wherein, described first induction information comprises bypass route;
Described main roads corridor, the localized road network that to refer to or substantially identical main traffic thoroughfare, city, several directions be skeleton.
2. traffic induction method according to claim 1, is characterized in that, the congestion information that described backtracking sets crossing in duration from current time is specially:
The congestion information of crossing is determined according to the congestion information in section, and the congestion information of the determined crossing of corresponding record and determine moment of congestion information of this crossing;
Inquire about the moment of the congestion information of this crossing of determination of recording, find out each moment in the setting duration to current time, the congestion information of this crossing that the moment found out is corresponding is the congestion information setting this crossing of recording in duration from current time.
3. traffic induction method according to claim 1, is characterized in that, the described span of duration that sets is as [5min, 60min]; The span of described proportion threshold value is (1, ∞).
4. the traffic induction method according to claim 1,2 or 3, it is characterized in that, the method also comprises: when main traffic thoroughfare does not exist bottleneck congestion points, or, there is bottleneck congestion points, but when the ratio of the journey time of the circuit that detours on main traffic thoroughfare and the journey time on this main traffic thoroughfare does not exceed proportion threshold value, the method also comprises:
Generate the second induction information or the 3rd induction information, and issue the induction information of this generation; Wherein, described second induction information comprises the position of bottleneck congestion points; Described 3rd induction information comprises the prompting that there is congestion points.
5. traffic induction method according to claim 2, is characterized in that, the congestion information in described section is the journey time in section; Accordingly,
The congestion information of described crossing is the delay time at stop of crossing;
Described judge this crossing be whether bottleneck congestion points as:
According to moment corresponding to the delay time at stop of this recorded crossing by the order after arriving first, by the delay time at stop sequence of this crossing traced back to, be designated as: T
ir, r=1,2 ..., [setting duration/T]-1, [setting duration/T]; Wherein, r is the sequence number of the delay time at stop of this crossing; T
irfor the delay time at stop of crossing i; [] is for rounding; T is the cycle of carrying out traffic guidance, or the time interval of renewal occurs the congestion information in section; In the sequence of the delay time at stop of this crossing;
Calculate T
irwith the ratio of the speed limit journey time of crossing i;
If T
irwith the increase monotone increasing of r, and when the number exceeding the ratio of predetermined threshold value in the ratio calculated is greater than setting number, think that this crossing is bottleneck congestion points; Otherwise this crossing is not bottleneck congestion points;
Wherein, the span of described preset number is [2,30]; The span of described predetermined threshold value is [1.5,5].
6. traffic induction method according to claim 2, is characterized in that, the congestion information in described section is the congestion index in section; Accordingly,
The congestion information of described crossing is the congestion index of crossing;
The described congestion information according to section determines that the congestion information of crossing is specially: perform step respectively to Shang Ge crossing, main roads corridor: get the maximal value in the congestion index of each entrance driveway of crossing, as the congestion index of this crossing;
The congestion information of the determined crossing of described corresponding record and determine that moment of congestion information of this crossing is: the congestion index of the determined crossing of corresponding record and determine moment of congestion index of this crossing, and the entrance driveway maximum with the congestion index of this crossing of congestion index corresponding record of determined crossing;
Accordingly, described judge this crossing be whether bottleneck congestion points as:
According to moment corresponding to the congestion index of this recorded crossing by the order after arriving first, by the congestion index sequence of this crossing traced back to, be designated as: d
ik, k=1,2 ..., [setting duration/T]-1, [setting duration/T]; Wherein, k is the sequence number of the congestion index of this crossing; d
ikfor the congestion index of crossing i; [] is for rounding; T is the cycle of carrying out traffic guidance, or the time interval of renewal occurs the congestion information in section; In the sequence of the congestion index of this crossing;
If d
ikincrease with k does not reduce, d
ikall be greater than the threshold value of blocking up pre-set, and determine and d
ikthe entrance driveway that corresponding each congestion index is maximum is same entrance driveway, thinks that this crossing is bottleneck congestion points; Otherwise this crossing is not bottleneck congestion points;
Wherein, the span of threshold value of blocking up described in is [0.6,1].
7. traffic induction method according to claim 2, is characterized in that, when the congestion information of described crossing is delay time at stop or the congestion index of crossing, the method also comprises:
In advance the span of the congestion information of crossing is divided into multiple jam level;
Differentiate the jam level that the congestion information of determined each crossing is corresponding respectively;
The jam level of each crossing and congestion information are labeled on position corresponding with this crossing on map accordingly, the standard of mark is: the jam level of each crossing and congestion information are all expressed as two concentrically ringed forms, jam level is represented with the fill color of roundlet, a kind of fill color of the corresponding roundlet of jam level every grade, the size of the annular region between two concentric circless represents congestion information;
Map sent to traffic control center or be distributed on induced screen.
8. traffic induction method according to claim 2, is characterized in that, when the congestion information of described crossing is delay time at stop and the congestion index of crossing, the method also comprises:
In advance the span of the delay time at stop of crossing is divided into multiple jam level;
Differentiate the jam level that the delay time at stop of determined each crossing is corresponding respectively;
The jam level of each crossing and delay time at stop are labeled on position corresponding with this crossing on map accordingly, the standard of mark is: the jam level of each crossing and delay time at stop are all expressed as two concentrically ringed forms, jam level is represented with the fill color of roundlet, a kind of fill color of the corresponding roundlet of jam level every grade, the size of the annular region between two concentric circless represents the delay time at stop;
Map sent to traffic control center or be distributed on induced screen; Or,
In advance the span of the delay time at stop of crossing is divided into multiple jam level;
Differentiate the jam level that the delay time at stop of determined each crossing is corresponding respectively;
The jam level of each crossing and congestion index are labeled on position corresponding with this crossing on map accordingly, the standard of mark is: the jam level of each crossing and congestion index are all expressed as two concentrically ringed forms, jam level is represented with the fill color of roundlet, a kind of fill color of the corresponding roundlet of jam level every grade, the size of the annular region between two concentric circless represents congestion index;
Map sent to traffic control center or be distributed on induced screen; Or,
In advance the span of the congestion index of crossing is divided into multiple jam level;
Differentiate the jam level that the congestion index of determined each crossing is corresponding respectively;
The jam level of each crossing and congestion index are labeled on position corresponding with this crossing on map accordingly, the standard of mark is: the jam level of each crossing and congestion index are all expressed as two concentrically ringed forms, jam level is represented with the fill color of roundlet, a kind of fill color of the corresponding roundlet of jam level every grade, the size of the annular region between two concentric circless represents congestion index;
Map sent to traffic control center or be distributed on induced screen; Or,
In advance the span of the congestion index of crossing is divided into multiple jam level;
Differentiate the jam level that the congestion index of determined each crossing is corresponding respectively;
The jam level of each crossing and delay time at stop are labeled on position corresponding with this crossing on map accordingly, the standard of mark is: the jam level of each crossing and congestion index are all expressed as two concentrically ringed forms, jam level is represented with the fill color of roundlet, a kind of fill color of the corresponding roundlet of jam level every grade, the size of the annular region between two concentric circless represents the delay time at stop;
Map sent to traffic control center or be distributed on induced screen.
9. the traffic induction method according to claim 7 or 8, is characterized in that, the described span by the delay time at stop of crossing is divided into multiple jam level and is specially:
The span of delay time at stop is divided into [0,10s], (10s, 35s], (35s, 60s], (60s, ∞), the one-level of four interval corresponding jam level is respectively to level Four; Wherein, one-level is unimpeded, and secondary is for slightly to block up, and three grades are blocked up for medium, and level Four is heavy congestion;
The described span by the congestion index of crossing is divided into multiple jam level and is specially:
The span of the congestion index of crossing is divided into interval [0,0.4), [0.4,0.6), [0.6,1], the one-level of three interval corresponding jam level is respectively to three grades; Wherein, one-level is unimpeded, and secondary is jogging, and three grades are blocked up; Or,
The span of the congestion index of crossing is divided into interval [0,0.2), [0.2,0.4), [0.4,0.6), [0.6,0.8), [0.8,1], the one-level of five interval corresponding jam level is respectively to Pyatyi; Wherein, one-level is very unimpeded, and secondary is unimpeded, three grades for slightly to block up, level Four is that moderate is blocked up, Pyatyi is heavy congestion.
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| CN106960571B (en) * | 2017-03-30 | 2020-10-16 | 百度在线网络技术（北京）有限公司 | Method and device for determining road congestion bottleneck point, server and storage medium |
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