|Table of Contents|

Effectiveness test of speed-limit sign in one-way closed work zone for expressway(PDF)

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

Issue:
2015年04期
Page:
93-100
Research Field:
交通运输规划与管理
Publishing date:

Info

Title:
Effectiveness test of speed-limit sign in one-way closed work zone for expressway
Author(s):
JIA Xing-li1 FU Zhi-peng2 XU Jin-liang1 CHEN Wen-hui3 JING Li-zhu14
1. Key Laboratory for Special Area Highway Engineering of Ministry of Education, Chang’an University, Xi’an 710064, Shaanxi, China; 2. CCCC First Highway Consultants Co., Ltd., Xi’an 710075, Shaanxi, China; 3. Tianjin Cement Industry Design and Research Institute Co., Ltd., Tianjin 300400, China; 4. Cockrell School of Engineering, The University of Texas at Austin, Austin 78741, Texas, USA
Keywords:
traffic engineering speed-limit sign effectiveness test one-way closed work zone running speed grading speed-limit
PACS:
U491.52
DOI:
-
Abstract:
The warning effectiveness of traffic sign, especially the speed-limit sign, in one-way closed work zone of experessway, was studied by using field tests and statistical analysis. The grading speed-limit program was proposed and the test program for traffic sign effectiveness was set up. A typical expressway section was chosen to test the effectivenesses of existing traffic sign, speed-limit sign position, grading speed-limit and optimizing traffic sign. Test result shows that the effectiveness of existing traffic sign, especially the speed-limit sign, is insufficient for speed-limit. In the expressway test section, after the vehicles pass through the speed-limit sign, they still have much higher speeds than the speed-limit values, and the speed reductions of the vehicles are very small. Through the optimization of traffic sign using grading speed-limit, the vehicles after passing through the work zone have significant reductions in their speeds, the speed of passenger car reduces by 38 km·h-1, and the speed of freight car reduces by 32 km·h-1. The difference value between passenger car running speed and the speed-limit value has reduced from 60 km·h-1 to 15 km·h-1, this kind of speed difference value for freight car is from 40 km·h-1 to 5 km·h-1, the speeds of vehicles are very close to the speed-limit values, and the variation tendency of traffic flow speed is consistent with the speed-limit difference value, so the effectiveness of traffic sign is greatly improved by the grading speed-limit optimization. 3 tabs, 10 figs, 21 refs.

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Last Update: 2015-08-30