双模式系统中组合策略与通行能力协同优化

Collaborative optimization for the combined strategy and capacity allocation in a bi-modal system

交通管理策略能够调整交通流量在多种出行模式间的分配从而实现系统最优.本文研究可交易电子路票与鼓励合乘组合管理策略对通勤者出发时间和出行模式选择的影响,分析交通管理策略参数(如鼓励合乘系数,电子路票收取数额和高承载率车道通行能力占比)的协同优化设计问题.研究表明,实施组合管理策略后,电子路票均衡价格可以唯一确定;实施单一策略时,政府鼓励合乘的力度越大,电子路票收取额的可行域越宽;系统最优解在HOV车道通行能力占比等于某个特定值,政府收取的电子路票数额和政府鼓励合乘的力度满足某一特定关系时获得;实施时变策略能够获得更高的系统成本改善但执行难度较大.本研究可以为政府管理部门实施有效的交通管理策略提供理论参考.

Traffic management strategies are capable of adjusting the traffic flow distribution among several travel modes so as to achieve the system optimum.This study investigates the influence of combined management strategy of tradable credit scheme(TCS)and encouraging carpooling on the commuters’departure time and travel mode choices,and collaboratively optimizes the parameters for the management strategy to achieve the system optimum,such as the coefficient for encouraging carpooling,the amount of credits charged on each vehicle and the capacity ratio for HOV lane.The results show that,after introducing the combined management strategy,the equilibrium credit price can be determined uniquely,in the uniform case,the lower is the coefficient for encouraging carpooling;the wider is the feasible region for the amount of credits charged on each vehicle,and the system optimum solution occurs when the capacity ratio for HOV lane equals a special value,and the amount of credits charged on each solo vehicle varies with the coefficient for encouraging carpooling along a specific relationship,and in the time-varying case,the improvement of total travel cost is higher but hard to operate it.This study can provide references for administrator implementing effective traffic management strategies.