Abstract: The length design of acceleration lane on expressway weaving area is the key part for the expressway design. To design its length reasonably, the microscopic traffic simulation method is introduced. Based on the services traffic of mainline lane and ramp under different design speed, the micro-traffic system TPSS is used to analyze the effect of the length of the acceleration lane on the service level in the confluence area. The reasonable recommended values of acceleration lane on expressway weaving area are proposed.

Key words: expressway weaving area, acceleration lane length, service levels, design method

摘要： 快速路合流区加速车道长度确定是快速路设计的核心内容。为了更加合理地确定快速路合流区加速车道的长度，引入微观交通仿真方法，基于主线和匝道在不同设计速度下的服务交通量，利用微观交通仿真系统TPSS对不同情形下加速车道长度对合流区服务水平的影响进行了分析，在此基础上提出了快速路合流区加速车道长度的合理推荐值。

关键词: 快速路合流区, 加速车道长度, 服务水平, 设置方法