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Mathematical Problems in Engineering
Volume 2015 (2015), Article ID 762379, 7 pages
http://dx.doi.org/10.1155/2015/762379
Research Article

Engineering Solutions to Enhance Traffic Safety Performance on Two-Lane Highways

1College of Traffic, Northeast Forestry University, Harbin 150080, China
2College of Automobile and Traffic Engineering, Heilongjiang Institute of Technology, Harbin 150050, China
3School of Transportation Science and Engineering, Harbin Institute of Technology, Harbin 150090, China
4Research Institute of Highway, Ministry of Transport, Beijing 100088, China

Received 28 July 2014; Revised 2 November 2014; Accepted 10 November 2014

Academic Editor: Huimin Niu

Copyright © 2015 Lina Wu et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Improving two-lane highway traffic safety conditions is of practical importance to the traffic system, which has attracted significant research attention within the last decade. Many cost-effective and proactive solutions such as low-cost treatments and roadway safety monitoring programs have been developed to enhance traffic safety performance under prevailing conditions. This study presents research perspectives achieved from the Highway Safety Enhancement Project (HSEP) that assessed safety performance on two-lane highways in Beijing, China. Potential causal factors are identified based on proposed evaluation criteria, and primary countermeasures are developed against inferior driving conditions such as sharp curves, heavy gradients, continuous downgrades, poor sight distance, and poor clear zones. Six cost-effective engineering solutions were specifically implemented to improve two-lane highway safety conditions, including (1) traffic sign replacement, (2) repainting pavement markings, (3) roadside barrier installation, (4) intersection channelization, (5) drainage optimization, and (6) sight distance improvement. The effectiveness of these solutions was examined and evaluated based on Empirical Bayes (EB) models. The results indicate that the proposed engineering solutions effectively improved traffic safety performance by significantly reducing crash occurrence risks and crash severities.