快速路辅道“右出右进”交叉口渠化方案研究

Research on Channelization Scheme of “Right-out and Right-in” Intersections of Expressway Auxiliary Roads

摘要:

依托六安市G312合六界至迎宾大道交叉口段快速化改造工程实例，列举出城市快速路辅道与相交道路采用“右出右进”交通组织方式时，可选交叉口中设计信号控制、交叉口中设计较大交通岛、交叉口中设计较小交通岛、辅道进出口道设计变速车道这4种交叉口渠化设计方式；从影响相交道路转向车流的通行效率、对辅道直行车流的干扰、交叉口范围的占地规模、交叉口范围的工程费用和行车安全性这5种评价指标出发，对4种交叉口渠化设计方式进行优缺点比选，并探讨了在不同相交道路所处位置的转向交通量大小、用地受限情况和工程投资费用高低这3类适用条件下，4种交叉口渠化设计的优化方案，供以后类似工程参考。

Abstract:

Based on the example of the Liuan G312 Heliu Boundary - Yingbin Avenue Intersection Section Rapidization Reconstruction Project, four intersection channelization design methods of designing signal control at intersections, designing larger traffic islands at intersections, designing smaller traffic islands at intersections, and designing variable speed lanes at the entrances and exits of auxiliary roads can be selected when the the "right-out and right-in" traffic organization mode is listed for the auxiliary roads and intersecting roads of urban expressways. Starting from five evaluation indicators, namely, the traffic efficiency affecting the turning traffic flow on intersecting roads, the interference to the straight-going traffic flow on auxiliary roads, the land occupation scale of the intersection area, the engineering cost of the intersection area, and the driving safety, the advantages and disadvantages of the four intersection channelization design methods are compared. Four optimization schemes for intersection channelization design are discussed under three applicable conditions, such as the size of turning traffic volume at different intersecting road locations, the land use constraints, and the level of engineering investment costs, which can be referred for the similar projects in the future.