Hindawi Publishing Corporation Mathematical Problems in Engineering Volume 2013, Article ID 108636, 8 pages http://dx.doi.org/10.1155/2013/108636 Research Article Crossing Reliability of Electric Bike Riders at Urban Intersections Huan Mei, Yang Xiaobao, and Jia Bin MOE Key Laboratory for Urban Transportation Complex Systems heory and Technology, Beijing Jiaotong University, Beijing 100044, China Correspondence should be addressed to Yang Xiaobao; yangxb@bjtu.edu.cn Received 13 June 2013; Accepted 31 July 2013 Academic Editor: Wuhong Wang Copyright © 2013 Huan Mei et al. his 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. his paper presents a crossing reliability model of electric bike riders at urban intersections using survival analysis approach. Riders’ crossing behavior was collected by video cameras. Waiting times in the red-light phase were modeled by reliability-based model that recognizes the covariate efects. hree parametric models by the exponential, Weibull, and log-logistic distributions were proposed to analyze when and why electric bike riders cross against the red light. he results indicate that movement information and situation factors have signiicant efects on riders’ crossing reliability. he indings of this paper provide an important demonstration of method and an empirical basis to assess crossing reliability of electric bike riders at the intersection. 1. Introduction Nonmotorized vehicles (i.e., mainly regular bicycles and elec- tric bikes) are one of the most popular means of transporta- tion in some Asian developing countries, such as Vietnam, Cambodia, and China. Even in developed countries, cycling travel is recognized as low energy consumption, healthy to the users and do not damage the health of others. For example, people who go to work by bike would obtain material reward from the government in Korea [1]. In London, in order to encourage people to travel by bike, the local government carried out the cycling revolution [2]. In recent years, the electric bike has entered people’s life. Because of electric bike is labor-saving and speedy, it has emerged as a popular mode of transportation in many large cities in China [3]. he number of Chinese electric bikes was about 140 million in 2012 [4]. Electric bikes in China are deined as electric two wheelers with relatively low speeds and weights compared to a motorcycle. Both bicycle- style electric bikes (with functioning pedals) and scooter- style electric bikes (with many of the features of gasoline scooters) are classiied as bicycles and are given access to bicycle infrastructure (see Figure 1). However, the growing popularity of cycling traic also entails safety concerns as observed in accident and injury statistics. Traic accident proportion of cyclists has always been high because cyclists are vulnerable groups in the traic conlict. In 2010, 4616 regular bicyclists were killed and 14,283 were seriously injured in road accidents, representing 7.1% of all traic fatalities and 5.6% of injuries [5]. With the rapidly increasing number of electric bikes, more and more people pay much concerned about traic security problems involved electric bikes. In 2004, 589 electric bike riders were died and 5295 were seriously injured in road accidents [6]. In 2010, the corresponding igures increased to 4029 and 20,311, respectively, representing 6.2% of all traic fatalities and 8.0% of injuries [5]. Accident analysis reveals that over 60% of cyclist fatal crashes were caused by violation of traic rules [5]. Red- light crossing is a typical type of rule violation behavior. Because of the poor law enforcement and peoples’ low safety awareness, violation behavior in the red-light period is rather prevalent and represents a substantial safety problem in Chinese urban intersections [7]. Particularly, electric bike riders with relatively high speed are much more likely to increase the risk of traic incident. So far, many scholars have studied red-light crossing behaviors, but many focused on motorized vehicles [8, 9] and pedestrians [10–13]. Unfortunately, only a few studies have investigated bicyclists’ red-light crossing behavior, much less