Set methods of left-turn waiting zone at signalized intersection

DING Wei^1,2, YANG Xiao-guang¹, YANG Xiao-long³

1.School of Traffic and Transportation Engineering,Tongji University,Shanghai 200092,China;2.School of Civil Engineering,Xi¡¯an University of Architecture & Technology,Xi¡¯an 710055,China;3.Xi¡¯an Yanliang National Aviation Hi-tech Industrial Base,Xi¡¯an 710089,China



Abstract:

To maximize the number of vehicles passing by the stop-line in a cycle and improve the operation efficiency of intersection in China,the settlement of left-turn lane waiting-zone is becoming prevailing. Based on conflicting-point method,the internal mechanism of left-turn flow after stopping line was analyzed through taking postposition left-turn lane waiting-zone intersection for instance. The relationship between the first left-turn vehicle and the last vehicle of previous phase passing the conflicting point was expounded. According to the time of successive arriving of two vehicle flows at conflicting-point,the reasonable layout for waiting area of left-turn vehicles was researched when the clearance index was less than 0. The results suggest that the appropriate layout for waiting area of left-turning vehicles can improve the operation efficiency of intersections.

Key words:  left-turn waiting zone  collision point analysis methodology  clearance index

DOI£º10.11916/j.issn.1005-9113.2009.03.004

Clc Number:U491.54

Fund: