Research On Optimization Of Bus Lane Activation Time And Road Capacity Allocation During Peak Hours

Urban traffic demand is complex and ever-changing.As the main travel mode in the morning and evening rush hours,buses bear a considerable portion of travel demand.However,in general,buses do not have an advantage in competing with cars for the right of way.Therefore,traffic managers usually set up bus lanes only for buses on certain road sections to ensure bus priority and also induce some travelers to choose buses to complete their trips,which is beneficial for improving the commuting efficiency of public transportation.However,the utilization efficiency of bus lanes is low,the ordinary lanes during morning and evening rush hours are in a state of queue congestion,seriously wasting the city’s road resources.Therefore,on the basis of meeting travel needs,in order to reasonably utilize road resources and improve the operational efficiency of urban transportation systems,its has important theoretical and practical significance to optimize the activation time and capacity allocation of bus lanes.This paper selects the sections of urban bus lanes as the research object,taking into account factors such as lane width,lane position,and number of entry lanes,as well as the right of way for public and social vehicles.In order to fully utilize the traffic capacity of this section,this paper constructs the optimization model of bus lane activation time,road capacity allocation optimization model,and a joint optimization model of bus lane activation time and capacity allocation,and furthermore the corresponding algorithms are designed.The effectiveness of the proposed models and algorithms are verified by numerical examples.The main work and innovative points of the paper are summarized as follows:Firstly,a capacity model for road sections set with bus lane with ramp access points was established.Built on it,an optimization model of bus lane activation time is established with the objective of minimizing the total travel delay during peak hours.An artificial ecosystem intelligent optimization algorithm is then designed,and numerical examples were used to validate the proposed model and algorithm;Secondly,given the optimized activation time of bus lanes by the optimization model of bus lane activation time,a road capacity allocation optimization model is constructed with the objective function of minimizing the total travel delay during peak hours.The corresponding algorithm design and example verification are conducted to reasonably utilize bus lane capacity while the service level of buses does not significantly decrease;Finally,in combination with the optimization of bus lane activation time and the optimization of road capacity allocation,a combinatorial optimization model of bus lane activation time and road capacity allocation is established.Using the designed algorithm,the best bus lane activation time is generated,and simultaneously the road capacity is reasonably allocated.Through the comparative analysis of the numerical results,the combinatorial optimization model not only ensures public transport priority,but also improves the utilization of road resources,significantly reducing the total travel delay.