|Table of Contents|

Determination method of speed-limit sign position in expressway work zone(PDF)

《交通运输工程学报》[ISSN:1671-1637/CN:61-1369/U]

Issue:
2013年05期
Page:
91-98
Research Field:
交通运输规划与管理
Publishing date:

Info

Title:
Determination method of speed-limit sign position in expressway work zone
Author(s):
YU Ren-jie MA Rong-guo HAN Hai YAN Ying WANG Jun-ling
School of Highway, Chang'an University, Xi'an 710064, Shaanxi, China
Keywords:
traffic safety expressway work zone speed-limit sign visual recognition analysis front distance post distance
PACS:
U491.52
DOI:
-
Abstract:
Based on the visibility and short-term memory of driver, the adaptability of driver and the controllability of vehicle under the influence of speed-limit sign were analyzed, and the front distance, post distance and repetitive distance of speed-limit sign in expressway constrution area were calculated. Based on the calculation model of length partition in expresswaywork zone, the influences such as vehicle queue length, the short-term memory of driver and repetitive distance were considered, the determintation method of speed-limit sign position in expressway work zone was proposed, and the example verification was carried out by using VISSIM simulation software. Simulation result shows that when the lowest speed-limit value is 40 km·h-1, the cart mix rate is 40% and traffic volume is 1 400 pcu·h-1, the minimum conflict rates of the first, second and third grade speed-limit signs are 0.06, 0.10and 0.21 times·m-1, the maximum conflict rates are 0.56, 0.14 and 0.23 times·m-1. When traffic volume is 1 960 pcu·h-1, the minimum conflict rates of the three speed-limit signs are 0.84, 0.28 and 0.36 times·m-1, the maximum conflict rates of the three speed-limit signs are 0.87, 0.31 and 0.40 times·m-1. When traffic volume is 2 240 pcu·h-1, the minimum conflict rates of the three speed-limit signs are 0.72, 0.31 and 0.39 times·m-1, the maximum conflict rates of the three speed-limit signs are 0.74, 0.34 and 0.48 times·m-1. 1 tab, 7 figs, 23 refs.

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Last Update: 2013-10-30