CN104778832B - A kind of multimode Urban Road Cross-section resource coordination collocation method - Google Patents

A kind of multimode Urban Road Cross-section resource coordination collocation method Download PDF

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CN104778832B
CN104778832B CN201510203023.7A CN201510203023A CN104778832B CN 104778832 B CN104778832 B CN 104778832B CN 201510203023 A CN201510203023 A CN 201510203023A CN 104778832 B CN104778832 B CN 104778832B
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叶娇
朱丽
王斌
陈峻
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Southeast University
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Abstract

The invention discloses a kind of multimode Urban Road Cross-section resource coordination collocation method, this method decides whether to set public transportation lane and uses which kind of cross-sectional form according to set red line width and design requirement first, it is then determined that the road supply conditions of motor vehicle, determine the whether mixed row of car bus and each lane width of car lane, and determine transportation condition, the standard unit's width passenger traffic efficiency and emission index of various modes of transportation are determined again, and then it is maximum to set up section passenger traffic efficiency, the minimum object function of emission index and corresponding constraints, finally solve object function, obtain the key parameter and cross section resource allocation result in optimization process.The present invention can provide one and cause road Cross Section passenger capacity larger and the less cross section layout design scheme of discharge capacity under the road conditions and transportation condition of set red line width.

Description

A kind of multimode Urban Road Cross-section resource coordination collocation method
Technical field
The present invention relates to a kind of multimode Urban Road Cross-section resource coordination collocation method, belong to Urban Traffic Planning Field.
Background technology
China city is in densely-populated in compact arrangement form, built-up areas, and big and medium-sized cities land resource is in pole Non-starving condition is spent, with the raising of Chinese Urbanization level and urban society's level of economic development, this situation will be in further Aggravation trend.Other Urban vehicles poputation rapidly increases, the traffic congestion and problem of environmental pollution thus brought It is increasingly serious.Therefore, how it is scientific and reasonable distribution Urban Road Cross-section resource, adapt to multimode transport need on the premise of Land resources utilization efficiency is improved as far as possible to be particularly important.
New urban theory proposes " transit guiding exploitation " (TOD) pattern, supports public transport to use, and reduces to car The demand used.To the aspect of Planning and Design of Urban Road Cross-section, every country has corresponding specification, especially with the U.S. and day This is representative, but the scope for being still each lane width given by these design specifications, and in design road Cross Section When, the current problem in " road " is excessively paid close attention to, traffic efficiency is ignored or even abandoned as more and more important criterion The vital action of " street " carrying originally.In addition when carrying out cross section global design, the ring brought by motor vehicle is not accounted for Border pollution problem.
To embody the planning and design concept of people-oriented and sustainable development, it is vapour merely that road Cross Section design, which should be broken away from, The thought of car service.Research takes efficiency analysis from traveler angle with multimode traffic adopter's unit path resource Based on, the micromodel of Urban Road Cross-section resource coordination configuration is set up in research, as big as possible with cross section passenger capacity Design is optimized with as small as possible be laid out for object function to the cross section of set red line width of cross section discharge capacity.
The content of the invention
Goal of the invention：In order to overcome the deficiencies in the prior art, the present invention provides a kind of multimode urban road Cross section resource coordination collocation method, this method can provide one under the road conditions and transportation condition of set red line width It is individual so that road Cross Section passenger capacity is larger and the less cross section layout design scheme of discharge capacity.
Technical scheme：To achieve the above object, the technical solution adopted by the present invention is：A kind of multimode urban road is horizontal Section resource coordination collocation method, comprises the following steps：
Step 1, public transportation lane and cross-sectional form are determined according to the red line width and design requirement of road；While root The dividing strip situation being provided with according to cross-sectional form, determines the original width of dividing strip；
Step 2, the public transportation lane and the cross-sectional form of use determined according to the red line width and step 1 of road is true The road supply conditions of motor vehicle are determined, while determining the width in car bus colleague's situation and each track of car lane；
Step 3, transportation condition is determined according to design requirement, the transportation condition includes there are several traffic sides on cross section Formula, the desin speed of various modes of transportation and unit vehicle average passenger occupancy, set the expected service water of various modes of transportation It is flat；
Step 4, the desin speeds of the various modes of transportation obtained according to step 3, unit vehicle average passenger occupancy and pre- Phase service level, the road supply conditions of the motor vehicle of step 2 determination, car bus colleague's situation and car lane are each The width calculation in track is selected into the standard unit's width passenger traffic efficiency and emission index of the various modes of transportation in cross section；
Step 5, the expection service level obtained according to step 3, and in step 4 calculate obtain be selected into each of cross section The standard unit's width passenger traffic efficiency and emission index of mode of transportation are planted, cross section passenger traffic efficiency is set up maximum, emission index minimum Object function and corresponding constraints；
Step 6, after the object function for obtaining step 5 foundation, the combination of various mode of transportation number of track-lines is traveled through, is asked Optimal case is solved, the key parameter and cross section resource allocation result in optimization process is obtained.
Obtained standard unit's width passenger traffic efficiency is calculated in the step 4：
Ci=Ci0×pi×ηi；
In formula：Ei- standard unit width passenger traffic efficiency, i- value 1-4, respectively correspond to car road, public transportation lane, Bicycle lane and pavement；Ci- mode of transportation i unit lane design passenger capacity, Wi0- it is that standard unit track is wide Degree, pi- introducing mode of transportation i average passenger occupancy, ηi- mode of transportation i lane capacity correction factor, Ci0- design Traffic capacity calculated value, viThe speed of service of-the i-th kind of traffic flow, Si- safe bus head spacing, L0- length of wagon, a- is average Deceleration, v0Initial velocity before-deceleration, t- reaction time.
The unit width emission index obtained in the step 4 includes standard unit's width emission index of car, bus Standard unit's width emission index；
Wherein, standard unit's width emission index of car is：
yHC=7.24546 × 10-4+6.73095×10-5x-2.29452×10-6x2+2.16185×10-8x3
yCO=8.68 × 10-3+2.4×10-3x-9.92745×10-5x2+9.62459×10-7x3；
In formula, y1- car standard unit width emission index,Average emission rate, yHC- HC's is averaged Emission index, yCO- CO average emission rate, x- Vehicle Speeds；
Standard unit's width emission index of bus is：
yPM=8.697 × 10-5+1.3533×10-4x-9.282×10-6x2
In formula, y2- public transportation lane standard unit width emission index,Average emission rate, yPM- PM's Average emission rate.
The load-carrying efficiency for the whole road Cross Section set up in the step 5 is as big as possible, and energy resource consumption is as few as possible Resource optimization model objective function：
In formula：The passenger traffic efficiency in the whole cross sections of E-, Nq- mode of transportation q number of track-lines, Wq- mode of transportation q unit Lane width, vqFor Vehicle Speed or walking speed, SqFor mode of transportation q safe bus head spacing, N1、N2Respectively The number of track-lines of car and public transportation lane；W1、W2Respectively the unit lane width of car and public transportation lane, y1To be small Car gage unit width emission index, y2For public transportation lane standard unit width emission index, pqFor mode of transportation q average load Volume of passenger traffic, ηqFor mode of transportation q lane capacity correction factor, Wq0For standard unit's lane width；
The bound for objective function：
In formula：The red line width of D- planning, Nq- mode of transportation q number of track-lines, Wq- mode of transportation q unit track is wide Degree, Wn- motor vehicle fast lane width, Ww- motor vehicle kerb lane width, Wm- central strip bandwidth, Wj- machine is overstepping one's bounds Every bandwidth, WrThe non-street medians width of-people；NqminFor the mode of transportation q minimum number of track-lines of design.
A kind of multimode Urban Road Cross-section resource coordination collocation method that the present invention is provided, compared with prior art, Have the advantages that：
The present invention is using Urban Road Cross-section as research object, while minimum for mesh with passenger traffic efficiency optimization and exhaust emissions Mark, establishes based on multimode Urban Road Cross-section resource coordination Optimized model, makes up in the resource allocation of cross section with machine Motor-car ignores the defect that " people " is only path resource distribution body for allocation unit, and rationally controls in the design phase motor-driven The exhaust emissions amount of car.The present invention can be on the basis of the red line width and mode of transportation that planning is determined, by setting up many mesh Target Optimized model, provides and configures optimal case based on multimode cross section resource coordination.Because two object functions are in During conflict situation, in the absence of all object functions are made while reaching the optimal solution of extreme value, noninferior solution, i.e. Pareto can only be sought Solution.Under set red line width conditions, cross section placement scheme limited amount then considers to enter model by algorithm establishment Row is exhaustive to be solved.It can be obtained by the optimum results for analyzing example as drawn a conclusion：1. the horizontal stroke obtained by different object functions Section optimization scheme is different；2. the increase of car lane can improve passenger capacity really, but be due to that its emission index is big, ring Border pollution also corresponding increase, and increasing degree is more than the amplitude that passenger capacity is improved；3. if only concern emission index, then Passenger traffic efficiency will be substantially reduced, and be unfavorable for the operating of urban traffic network；4. prioritization scheme resulting under two-objective programming can With while at a relatively high passenger traffic efficiency is reached emission index it is also relatively small, meet sustainable development idea, compared to the monocular offer of tender For number scheme, the overall operation benefit in cross section is optimal.
Brief description of the drawings
Fig. 1 is flow chart of the invention.
Fig. 2 is three kinds of prioritization scheme comparative analysis figures in present example, wherein, Fig. 2 a are only with motor vehicle passenger capacity For the prioritization scheme of object function, Fig. 2 b are that, as the prioritization scheme of object function, Fig. 2 c are two-objective programming only using discharge capacity Prioritization scheme.
Embodiment
The present invention is further described below in conjunction with the accompanying drawings.
A kind of multimode Urban Road Cross-section resource coordination collocation method, as shown in figure 1, comprising the following steps：
Step 1, public transportation lane and cross-sectional form are determined according to the red line width and design requirement of road, it is described to set Meter demand is category of roads, actual measurement or prognosis traffic volume and bus passenger flow；The dividing strip being provided with simultaneously according to cross-sectional form Situation, determines the original width of dividing strip.
Step 2, the public transportation lane and the cross-sectional form of use determined according to the red line width and step 1 of road is true The road supply conditions of motor vehicle are determined, while determining the width in car bus colleague's situation and each track of car lane.
Step 3, transportation condition is determined according to design requirement, the transportation condition includes there are several traffic sides on cross section Formula, the desin speed of various modes of transportation and unit vehicle average passenger occupancy, set the expected service water of various modes of transportation It is flat.
Step 4, the desin speeds of the various modes of transportation obtained according to step 3, unit vehicle average passenger occupancy and pre- Phase service level, the road supply conditions of the motor vehicle of step 2 determination, car bus colleague's situation and car lane are each The width calculation in track is selected into the standard unit's width passenger traffic efficiency and emission index of the various modes of transportation in cross section.
Standard unit's width passenger traffic efficiency：
Ci=Ci0×pi×ηi；
In formula, Ei- standard unit width passenger traffic efficiency, unit person (m/s)/(mh)；I- value 1-4, point Dui Ying not car road, public transportation lane, bicycle lane and pavement；Ci- mode of transportation i unit lane design passenger traffic Ability, unit person/h；Wi0- it is standard unit's lane width, unit m primarily serves lane width and passenger capacity is repaiied Positive interaction, wherein car lane take 3.25, and public transportation lane takes 3.5, and cycle track takes 1.2, and pavement takes 0.8；pi- introduce Mode of transportation i average passenger occupancy, unit people/veh calculates cross section passenger capacity；ηi- mode of transportation i lane energy Power correction factor, its value is that, in order to verify the correctness of traffic capacity computation model, its value is relevant with desin speed, its medium and small vapour Car desin speed be less than or equal to 60km/h when take 1.00 or desin speed be more than 60km/h when take 1.40, bus desin speed is small Taken when equal to 60km/h 1.00 or desin speed be more than 60km/h when take 1.17, bicycle takes 1.39, and walking takes 1.22；Ci0- Design capacity calculated value, unit veh/h；viThe speed of service of-the i-th kind of traffic flow, unit m/s；SiBetween-safe bus head Away from i.e. stopping sight distance, unit m；L0- length of wagon, wherein unit m, car take 4.70, and bus takes 12.00, bicycle Take 1.90；A- average retardation rates, unit m/s2；v0Initial velocity before-deceleration, unit m/s；The t- reaction time, unit s, Take 0.97.
Unit width emission index includes standard unit's width emission index of car, standard unit's width discharge of bus Rate；
Wherein, standard unit's width emission index of car is：
yHC=7.24546 × 10-4+6.73095×10-5x-2.29452×10-6x2+2.16185×10-8x3
yCO=8.68 × 10-3+2.4×10-3x-9.92745×10-5x2+9.62459×10-7x3；
In formula, y1- car standard unit width emission index, unit mg/ (ms)；Average emission Rate, unit mg/s；yHC- HC average emission rate, unit mg/s；yCO- CO average emission rate, unit mg/s；
X- Vehicle Speeds, unit m/s；
Standard unit's width emission index of bus is：
yPM=8.697 × 10-5+1.3533×10-4x-9.282×10-6x2
In formula, y2- public transportation lane standard unit width emission index, unit mg/ (ms)；Average row Put rate, unit mg/s；yPM- PM average emission rate, unit mg/s.
Step 5, the expection service level obtained according to step 3, and in step 4 calculate obtain be selected into each of cross section The standard unit's width passenger traffic efficiency and emission index of mode of transportation are planted, cross section passenger traffic efficiency is set up maximum, emission index minimum Object function and corresponding constraints.
The load-carrying efficiency for the whole road Cross Section set up is as big as possible, energy resource consumption few resource optimization model as far as possible Object function：
Miny=N1W1y1+N2W2y2；
The standard unit's width passenger traffic efficiency obtained by step 4 is obtained；
In formula (1)：The passenger traffic efficiency in the whole cross sections of E-, unit person (m/s)/h；Nq- mode of transportation q car Road number；Q represents the mark of mode of transportation, q=1,2,3,4, car, bus, bicycle and pedestrian are represented respectively；Wq- hand over Logical mode q unit lane width, unit m；vqFor Vehicle Speed or walking speed, unit m/s；SqFor mode of transportation q Safe bus head spacing, i.e. stopping sight distance, unit m；Y is the emission index in whole cross section, unit mg/s；N1、N2Respectively small vapour The number of track-lines of car and public transportation lane；W1、W2Respectively the unit lane width of car and public transportation lane, unit m；y1For Car standard unit width emission index, unit mg/ (ms)；y2For public transportation lane standard unit width emission index, unit mg/ (ms)；pqFor mode of transportation q average passenger occupancy, unit people/veh calculates cross section passenger capacity；ηqFor mode of transportation q car Road traffic capacity correction factor, its value is to verify the correctness of traffic capacity computation model, take urban road design criterion In design capacity value compare, find formula calculate obtained by the traffic capacity it is incomplete with the traffic capacity that specification is provided It is equal, then use coefficient ηqThe traffic capacity is modified；Wq0For standard unit's lane width, unit m primarily serves track wide Spend the correcting action to passenger capacity；Eq- mode of transportation q standard unit's width passenger traffic efficiency, unit person (m/s)/ (m·h)。
Set up correspondence scalar functions and set up constraint equation, include the number of track-lines two of boundary lines of roads width, each mode of transportation The constraint of aspect.Boundary lines of roads wide constraint：Road Cross Section width shared by various modes of transportation and street medians width sum are not More than boundary lines of roads width,
In formula (2), D is the red line width of planning, unit m；NqFor mode of transportation q number of track-lines；WqFor mode of transportation q's Unit lane width, unit m；WnFor motor vehicle fast lane width, unit m；WwFor motor vehicle kerb lane width, unit m； WmFor central strip bandwidth, unit m；WjFor the non-street medians width of machine, unit m；WrBehave non-street medians width, unit m；
Number of track-lines is constrained：(to bicycle lane and pavement, number of track-lines is that cross section can to number of track-lines shared by each mode of transportation The bicycle number and pedestrian's number passed through side by side) it is greater than the minimum number of track-lines of design requirement and there was only list less than hypothesis cross section Available maximum number of track-lines during item mode of transportation, it is as follows：
In formula (3), NqminFor the mode of transportation q minimum number of track-lines of design；NqFor mode of transportation q number of track-lines；D is planning Red line width, unit m；WqFor mode of transportation q unit lane width, unit m；
In summary, its constraints is as follows：
In formula：The red line width of D- planning, unit m；Nq- mode of transportation q number of track-lines；Wq- mode of transportation q unit Lane width, unit m；Wn- motor vehicle fast lane width, unit m；Ww- motor vehicle kerb lane width, unit m；Wm- Central strip bandwidth, unit m；WjThe non-street medians width of-machine, unit m；WrThe non-street medians width of-people, unit m.
Step 6, after the object function for obtaining step 5 foundation, the combination of various mode of transportation number of track-lines is traveled through, is asked Optimal case is solved, the key parameter and cross section resource allocation result in optimization process is obtained, that is, obtains and takes into account exhaust emissions The multimode cross section resource coordination allocation plan of passenger traffic efficiency comes first.
In order to better illustrate the present invention, now the principle to the present invention is illustrated.
Setting public transportation lane is decided whether, using which kind of cross section shape according to set red line width D and design requirement Formula, if dividing strip, also needs to determine the width W of dividing stripm、Wj、Wr。
According to red line width, public transportation lane and the cross-sectional form of use whether is set to determine that the road of motor vehicle is supplied Condition, that is, determine the whether mixed row of car bus and each lane width W of car lane1、W2、Wn、Ww。
Determine to have on transportation condition, including cross section several modes of transportation, various modes of transportation to set according to design requirement Count speed vqAnd unit vehicle average passenger occupancy ηqDeng.
Unit of account lane design passenger capacity, shown in formula such as formula (4)：
Cq=Cq0×pq×ηq (4)
In formula (4), CqFor mode of transportation q unit lane design passenger capacity, unit people/h；ηqFor mode of transportation q car Road traffic capacity correction factor.
Cq0For mode of transportation q unit track basic capacity, shown in calculation formula such as formula (5)：
In formula (5), vqFor Vehicle Speed or walking speed, unit m/s；SqRegarded for safe bus head spacing, i.e. parking Away from unit m, shown in calculation formula such as formula (6)：
In formula (6), L0For length of wagon, unit m, wherein car take 4.70, and bus takes 12.00, and bicycle takes 1.90；v0For the initial velocity before deceleration, unit m/s；T is the reaction time, and unit s takes 0.97；A is average retardation rate, unit m/s2；HCM handbooks provide the security row human world on pavement away from it is substantially stationary be 1.5m, i.e. S4=1.5m, including 0.6m step Row space and 0.9m psychological space.
Standard unit's width passenger traffic efficiency of each mode of transportation is calculated, shown in calculation formula such as formula (7)：
In formula (7), EqFor unit width passenger traffic efficiency, unit person (m/s)/(mh)；CqFor design passenger capacity, list Position person/h；Wq0For standard unit's lane width, unit m primarily serves correcting action of the lane width to passenger capacity, tool Body value reference table 1；
Standard unit's lane width (the unit m) of table 1
vqFor Vehicle Speed or walking speed, unit m/s.
Standard unit's width emission index of car is calculated, shown in formula such as formula (8),
In formula (8), W10For car lane standard unit lane width, unit m；
yNOx、yHC、yCORespectively NOx, HC, CO average emission rate, unit mg/s, calculation formula is respectively such as formula (9) (10) (11) shown in,
yHC=7.245 × 10-4+6.730×10-5x-2.294×10-6x2+2.161×10-8x3 (10)
yCO=8.68 × 10-3+2.4×10-3x-9.927×10-5x2+9.624×10-7x3 (11)
In the formula of the above three, x is car actual travel speed, unit m/s；
Standard unit's width emission index of bus is calculated, shown in formula such as formula (12),
In formula (12), W20For public transportation lane standard unit lane width, unit m；
yNOx、yPMRespectively NOx, PM average emission rate, unit mg/s, calculation formula respectively as shown in formula (13) (14),
yPM=8.697 × 10-5+1.3533×10-4x-9.282×10-6x2 (14)
In the formula of the above two, x is bus actual travel speed, unit m/s；
The expection service level of various modes of transportation is set, according to the calculation formula of service level, establish an equation the small vapour of solution The actual motion speed of car and bus, that is, seek x value；
The standard unit's width passenger traffic efficiency and standard unit's width emission index for each mode of transportation that calculating is obtained are substituted into Object function is obtained, as shown in formula (15),
E is the passenger traffic efficiency in whole cross section, unit person (m/s)/h；NqFor mode of transportation q number of track-lines；WqTo hand over Logical mode q unit lane width, unit m；EqFor mode of transportation q standard unit's width passenger traffic efficiency, unit person (m/ s)/(mh)；By the unit lane width W of red line width D, each mode of transportationq, number of track-lines NqWith isolation strip width Wm、Wj、WrSubstitute into Formula (2), obtains constraint equation
The combination of various mode of transportation number of track-lines is traveled through, the Pareto solution sought under two-objective programming is that is, relative Optimal cross section Resource Allocation Formula.As shown in Fig. 2 Fig. 2 a are only using motor vehicle passenger capacity as the optimization side of object function Case.Fig. 2 b are as the prioritization scheme of object function only using discharge capacity.Fig. 2 c are the prioritization scheme of two-objective programming.
Finally obtain cross section resource allocation result, i.e., the width and number of track-lines in cross section shared by each mode of transportation, simultaneously Obtain some key parameters in optimization process, including cross section discharge capacity, cross section passenger capacity and discharge capacity per capita.
Described above is only the preferred embodiment of the present invention, it should be pointed out that：For the ordinary skill people of the art For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should It is considered as protection scope of the present invention.

Claims (4)

1. a kind of multimode Urban Road Cross-section resource coordination collocation method, its feature comprises the following steps：
Step 1, according to the red line width and design requirement of road, public transportation lane and cross-sectional form are determined；While basis The dividing strip situation that cross-sectional form is provided with, determines the original width of dividing strip；
Step 2, the public transportation lane and the cross-sectional form of use determined according to the red line width and step 1 of road determines machine The road supply conditions of motor-car, while determining the width in car bus colleague's situation and each track of car lane；
Step 3, transportation condition is determined according to design requirement, the transportation condition includes there are several modes of transportation on cross section, each The desin speed and unit vehicle average passenger occupancy of mode of transportation are planted, the expection service level of various modes of transportation is set；
Step 4, desin speed, unit vehicle average passenger occupancy and the expected clothes of the various modes of transportation obtained according to step 3 Road supply conditions, car bus colleague's situation and each track of car lane for the motor vehicle that business level, step 2 are determined Width calculation be selected into cross section various modes of transportation standard unit's width passenger traffic efficiency and automotive emission rate；
Step 5, the expection service level obtained according to step 3, and the obtained various friendships for being selected into cross section are calculated in step 4 The standard unit's width passenger traffic efficiency and emission index of logical mode, set up the target that passenger traffic efficiency in cross section is maximum, emission index is minimum Function and corresponding constraints；
Step 6, after the object function for obtaining step 5 foundation, the combination of various mode of transportation number of track-lines is traveled through, is solved most Excellent scheme, obtains the key parameter and cross section resource allocation result in optimization process.
2. multimode Urban Road Cross-section resource coordination collocation method according to claim 1, it is characterised in that：Institute State the standard unit's width passenger traffic efficiency for calculating and obtaining in step 4：
E i = C i W i 0 × v i ;
Ci=Ci0×pi×ηi；
C i 0 = 3600 v i S i ;
S i = L 0 + v 0 t + v 0 2 2 a ;
In formula：Ei- standard unit width passenger traffic efficiency, i- value 1-4 correspond to car road, public transportation lane, non-machine respectively Motor-car road and pavement；Ci- mode of transportation i unit lane design passenger capacity, Wi0- it is standard unit's lane width, pi- introducing mode of transportation i average passenger occupancy, ηi- mode of transportation i lane capacity correction factor, Ci0- design is logical Row capacity calculation value, viThe speed of service of-the i-th kind of traffic flow, Si- safe bus head spacing, L0- length of wagon, a- averagely subtracts Speed, v0Initial velocity before-deceleration, t- reaction time.
3. multimode Urban Road Cross-section resource coordination collocation method according to claim 1, it is characterised in that：Institute Stating the standard unit's width emission index obtained in step 4 includes standard unit's width emission index, the standard of bus of car Unit width emission index；
Wherein, standard unit's width emission index of car is：
y 1 = 1 W 10 ( y NO x + y H C + y C O )
y NO x = 3.20529 × 10 - 4 + 6.22451 × 10 - 5 x
yHC=7.24546 × 10-4+6.73095×10-5x-2.29452×10-6x2+2.16185×10-8x3
yCO=8.68 × 10-3+2.4×10-3x-9.92745×10-5x2+9.62459×10-7x3；
In formula, y1- car standard unit width emission index,- NOxAverage emission rate, yHC- HC average emission Rate, yCO- CO average emission rate, x- Vehicle Speeds；
Standard unit's width emission index of bus is：
y 2 = 1 W 20 ( y NO x + y P M )
y NO x = 1.416 × 10 - 2 + 3.906 × 10 - 3 x - 1.02 × 10 - 4 x 2
yPM=8.697 × 10-5+1.3533×10-4x-9.282×10-6x2
In formula, y2- public transportation lane standard unit width emission index,- NOxAverage emission rate, yPM- PM average row Put rate.
4. multimode Urban Road Cross-section resource coordination collocation method according to claim 1, it is characterised in that：Institute The load-carrying efficiency for stating the whole road Cross Section set up in step 5 is as big as possible, energy resource consumption few resource optimization mould as far as possible Type object function：
max E = Σ q N q W q [ 3600 v q S q × p q × η q W q 0 × v q ] min y = N 1 W 1 y 1 + N 2 W 2 y 2 ;
In formula：The passenger traffic efficiency in the whole cross sections of E-, Nq- mode of transportation q number of track-lines, Wq- mode of transportation q unit track Width, vqFor Vehicle Speed or walking speed, SqFor mode of transportation q safe bus head spacing, N1、N2Respectively small vapour The number of track-lines of car and public transportation lane；W1、W2Respectively the unit lane width of car and public transportation lane, y1For car Standard unit's width emission index, y2For public transportation lane standard unit width emission index, pqFor mode of transportation q average passenger occupancy, ηqFor mode of transportation q lane capacity correction factor, Wq0For standard unit's lane width；The constraint bar of the object function Part：
s . t . 2 Σ q N q W q + W n + W w + W m + 2 W j + 2 W r + 1.0 ≤ D N q min ≤ N q ≤ D W q ;
In formula：The red line width of D- planning, Nq- mode of transportation q number of track-lines, Wq- mode of transportation q unit lane width, Wn- motor vehicle fast lane width, Ww- motor vehicle kerb lane width, Wm- central strip bandwidth, Wj- machine is non-to be separated Bandwidth, WrThe non-street medians width of-people；NqminFor the mode of transportation q minimum number of track-lines of design.
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