Method of the left-turning bus priority at intersections based on a variable lane

To reduce the delay of left-turning buses and improve the traffic efficiency at signalized intersections,a novel variable bus approach lane(VBAL)control method based on bus pre-signals is proposed.This method combines the variable lane with the bus priority pre-signal,and realizes the left-turning bus priority without causing great impact on other vehicles.To validate the effectiveness of the method,the VBAL scheme was compared with the single left-turn lane scheme(SLTL)and the double left-turn lane scheme(DLTL).On this basis,the delay change calculation model of left-turning buses and through vehicles were established by the cumulative curve graphic method.The influence of vehicle proportion and green split on the model was studied through sensitivity analysis.The results show that VBAL can reduce the delay of left-turning bus and the increase of through vehicle delay to the greatest extent.Finally,the scheme was applied to a real-world intersection,and the results demonstrate the effectiveness and advantage of the VBAL scheme.

Bus Priority Control for Dynamic Exclusive Bus Lane

One problem with the existing dynamic exclusive bus lane strategies is that bus signal priority strategies with multi-phase priority request at intersections are not adequately considered.The principle of bus signal priority level was designed based on the isolated multi-phase structure principle consideration of the bus signal priority,and a new priority approach for the dynamic exclusive bus lane was proposed.Two types of priority strategies,green extension and red truncation,were proposed for current phase and next phase buses,respectively.The control parameters including minimum green time,green extension time,maximum green time and bus arrival time are calculated.The case studies for this paper were carried out using four consecutive intersections of Huaide Middle Road in Changzhou City.The signal control scheme was designed using the conventional,exclusive bus lane method,the dynamic exclusive bus lane without signal priority method,and the proposed approach,respectively.The authors used the VISSIM simulation platform to evaluate the efficiency of each approach.Results showed that the method of approach can significantly decrease delays caused by social and conventional buses and make up for the negative impact social buses have on the bus rapid transit(BRT)operation,which allows the method to complement the dynamic,exclusive bus lane design.

研究昆明公交专用道系统运营特征

公交专用道系统运营特征及参数对公交专用道系统的规划、设计、运营等具有重要的意义。以昆明市公交专用道为例,通过大量的调查数据,对公交专用道系统的运营特征进行了研究。基于大量实测数据,从迅速性、可靠性、舒适性、运输效率等四个方面对昆明市北京路公交专用道系统的运营参数进行了研究。

A review of research on public transport priority based on CiteSpace

The prioritization of public transit as an essential means of promoting sustainable urban development has a significant role in improving the quality of public transportation services,reducing traffic congestion,and enhancing air quality.To improve the implementation of public transit prioritization policies,this study conducted a comprehensive review of relevant literature on public transit prioritization from two major citation databases(Web of Science and China National Knowledge Infrastructure)from 2003 to 2021.Utilizing the visualization analysis software CiteSpace,this study analyzed knowledge visualization from five aspects:research sources,research institutions,knowledge foundation,knowledge frontier,and research hotspots,and summarized the research history and implementation effectiveness of public transit prioritization policies.The study concludes that existing research has some deficiencies in terms of urban diversity,comprehensive evaluation system,holistic perspective,interdisciplinary collaboration,and consideration of economic and environmental impacts.Future research should focus on development directions such as intelligence,sustainability,interdisciplinary collaboration,and integration of multi-modal transportation.The findings of this study can provide valuable references for the implementation of public transportation prioritization policies and future research.