城市快速路匝道及变速车道控制参数研究  

Study on Control Parameters for Ramp and Speed-change Lane of Urban Expressway

作　　者：莫阳 

机构地区：[1]悉地(苏州)勘察设计顾问有限公司,江苏苏州215123

出　　处：《公路交通科技》2016年第5期111-120,127,共11页Journal of Highway and Transportation Research and Development

摘　　要：从分析出入口特性出发,寻找了确定匝道及变速车道控制参数的影响因素,解析了匝道设计速度和停车视距对匝道曲线最小半径、交通流率和匝道设计速度对变速车道长度和渐变段长度的影响机理。基于运动学原理、交通流理论、概率论等知识,建立了匝道及变速车道控制参数的计算模型。分析和计算结果表明:匝道设计速度宜按照匝道形式及两端连接道路的性质分级确定;对结构物形式匝道,满足停车视距要求的曲线最小半径比满足横向力系数要求的大;对双车道加速车道和宽度渐变段,在考虑交通流率影响状况下的长度计算值均比现行规范的要求值大。From analyzing the characteristics of entrance / exit,the influencing factors for determining control parameters of ramp and speed-change lane are found out. The mechanisms of effect of ramp design speed and stopping sight distance on the minimum ramp radius as well as the effects of traffic flow rate and ramp design speed on the lengths of speed-change lane and width-transition are resolved. Based on kinematics theory,traffic flow theory and probability theory,the calculation models of control parameters for ramp and speedchange lane are set up. The result of analysis and calculation shows that（ 1） the design speed of ramp is suitable to be classified according to the patterns and properties of roads on both ends connected by ramp;（ 2） the minimum curve radius of structure pattern ramp stopping sight distance is greater than that that meets the demands of side-way force coefficient; the calculated values of length for two-lane acceleration lane and width-transition under traffic flow rate affecting are greater than that required in current specifications.

关 键 词：交通工程 控制参数 计算模型 匝道 变速车道 横净距 车头时距 

分 类 号：U491.223[交通运输工程—交通运输规划与管理]