隧道进出口车速

     杨轸^①②   郭忠印^①

（①同济大学道路与交通工程教育部重点实验室  ②上海市政工程设计研究院）

摘要：通过自行开发的三轴加速度仪对某高速公路的十八条隧道的出入口的车速变化进行测量，分析了隧道出入口车速变化的一般规律。同时结合隧道出入口附近的道路线形，分析了道路线形对车速变化的影响。

关键词：隧道；车速变化；出入口；加速度

Research on Speed Alteration at Entrance and Exit of Tunnel

YANG Zhen   GUO Zhong-yin

Abstract: The speed alteration is measured at the entrance and exit of eighteen tunnels of an expressway by self-developed three-axes acceleration apparatus. The general regulation of speed alteration is attained and the effect on it of road alignment is also analyzed.

Keywords: Tunnel; Speed alteration; Entrance and exit; Acceleration.