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Car capacity near bus stops with mixed traffic derived by additive-conflict-flows procedure

Science China(Technological Sciences) 2011年第3期54卷 733-740页

作者： YANG XiaoBao GAO ZiYou SI BingFeng Gao Liang MOE Key Laboratory for Urban Transportation Complex Systems Theory and Technology Beijing Jiaotong University Beijing 100044 China

To determinate car capacity at bus stops with mixed traffic, a new theoretical approach was developed on the basis of additive-conflict-flows procedure. The procedure was extended from homogeneous traffic flow to mixed traffic flow. The conflicts among cars, buses and bicycles near the stop can be described by the extended procedure. The procedure can be understood more easily than the theory of gap acceptance. Car capacity near the stop is the function of both bus stream and bicycle stream. The proposed model can also analyze the cases of pedestrian effects and limited priority of bicyclists. Numerical results show that the car capacity decreases with the increasing flow rates of other streams. In addition, pedestrian effects and bicyclist's limited priority have negative effects on car capacity near bus stops with mixed traffic flow.

关键词： road capacity bus stop additive-conflict-flows procedure mixed traffic flow

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Combined Effect of Bus Stop and Access on Expressway capacity

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Journal of Donghua University(English Edition) 2015年第5期32卷 836-841,850页

作者：张洪宾贺玉龙孙小端宇仁德 Beijing Key Laboratory of Traffic Engineering Beijing University of Technology School of Transportation and Vehicle Engineering Shandong University of Technology

To determinate the combined effect of bus bay stops near access points on the expressway capacity,a new theoretical approach is developed on the basis of gap acceptance theory and queuing theory. According to the location between the bus stop and the access upstream or downstream,the capacity models on the expressway are developed for four cases. The results show that there are no significant differences in the capacity among four cases when the bus arrival rate is less than 60 veh / h and the car volume at the entrance and exit is less than 200 pcu / h. As the bus arrival rate and the car volume at the entrance and exit increase,the bus stops at downstream of an entrance and upstream of an exit have remarkable effect on the capacity. The increasing of berth number of the bus stop has a positive effect on the capacities of four cases.

关键词： road capacity bus stop access gap acceptance quenching theory

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Mixed traffic flow modeling near Chinese bus stops and its applications

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Journal of Central South University 2012年第9期19卷 2697-2704页

作者：杨小宝四兵锋环梅 Key Laboratory for Urban Transportation Complex Systems Theory and Technology of Ministry of Education(Beijing Jiaotong University)

To determine how bus stop design influences mixed traffic operation near Chinese bus stops,a new theoretical method was developed by using additive-conflict-flows *** procedure was extended from homogeneous traffic flow to mixed traffic *** on the procedure and queuing theory,car capacity and speed models were proposed for three types of bus stops including curbside,bus bay and bicycle *** effects of various combinations of bus stop type,traffic volume,bus dwell time,and berth number on traffic operations were *** results indicate that traffic volume,bus dwell time and berth number have negative effects on traffic operations for any type of bus *** different types of bus stops,at car volumes above approximately 200 vehicles per hour,the bus bay and bicycle detour designs provide more benefits than the curbside *** traffic volume increases,the benefit firstly increases in uncongested conditions and then decreases in congested *** reaches the maximum at car volumes nearly 1 100 vehicles per *** results can be used to aid in the selection of a preferred bus stop design for a given traffic volume in developing countries.

关键词： mixed traffic flow bus stop road capacity speed bicycles

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Design of an Evacuation Demand Forecasting Module for Hurricane Planning Applications

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Journal of Transportation Technologies 2016年第5期6卷 257-276页

作者： Gary P. Moynihan Daniel J. Fonseca Department of Civil Construction and Environmental Engineering The University of Alabama Tuscaloosa AL USA Department of Mechanical Engineering The University of Alabama Tuscaloosa AL USA

This paper discusses the development and implementation of an evacuation demand forecasting module that was incorporated into a comprehensive decision support system for the planning and management of contraflow operations in the Gulf of Mexico. Contraflow implies the reversing of one direction of a highway in order to permit a substantially increased travel demand exiting away from an area impacted by a natural disaster or any other type of catastrophic event. Correctly estimating the evacuation demand originated from such a catastrophic event is critical to a successful contraflow implementation. One problem faced by transportation officials is the arranging of the different stages of this complex traffic procedure. Both the prompt deployment of resources and personnel as well as the duration of the actual contraflow affect the overall effectiveness, safety and cost of the evacuation event. During this project, researchers from the University of Alabama developed an integral decision support system for contraflow evacuation planning to assist the Alabama Department of Transportation Maintenance Bureau in the evaluation and planning of contraflow operations oriented to mitigate the evacuation burdens of a hurricane event. This paper focuses on the design of the demand forecasting module of such a decision support system.

关键词： Hurricane Evacuation road capacity Demand Forecasting Decision Support System

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