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Mathematical Problems in Engineering
Volume 2015, Article ID 808151, 7 pages
http://dx.doi.org/10.1155/2015/808151
Research Article

Research on Recognition and Evaluation of Traffic Guide Sign

1College of Civil and Transportation Engineering, Hohai University, Nanjing 210098, China
2School of Automation, Nanjing University of Science and Technology, Nanjing 210094, China
3College of Civil Aviation, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China

Received 20 January 2015; Accepted 7 April 2015

Academic Editor: Wei (David) Fan

Copyright © 2015 Li Yuan 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

Traffic guide signs are effective only when they are clearly recognized by drivers. Three experiments were conducted in this study. In the first, the influence factors of guide sign recognition were studied. This study investigated 11 main factors with a convenience sample of drivers from Nanjing city in China. Weights of different influence factors were obtained through analytic hierarchy process (AHP). The results showed that the setting position, occlusion degree, and character size of guide sign had the most significant influence on the guide sign recognition, while other factors were less important. In the second stage, an evaluation model of guide sign recognition was developed based on weights of different factors. Four equations were presented to calculate the comprehensive score of guide sign, and the level of recognition was divided into five grades according to the comprehensive score. At last, a typical case in Nanjing was studied to verify the rationality and reliability of the evaluation model. Results from the real application indicate that the method had good applicability and can be used by traffic engineers.