中文摘要：

信号交叉口违法行驶的助动车对行人和其他车辆的安全是极大的威胁,为提出有针对性的解决措施,了解助动车在交叉口的违法特征,利用心理学行为观测与分析的方法,利用视频在国内观测上海市、武汉市和临沂市的3个信号交叉口的助动车行为并进行违法特征研究。研究结果表明：3个交叉口非机动车违法率分别为50%、70%和40%,违法情况非常严重。助动车驾驶员性别、车辆动力特征、交警执法与助动车在交叉口的违法存在相关性,男性助动车骑行者较女性有更高的违法率,燃油/燃气动力助动车骑行者较其他动力类型（电力和人力）有更高的违法率,无交警执法时较有交警执法时助动车更易违法。助动车交通设施、助动车交通法规和管理、助动车骑行者、混行交通条件等因素对助动车交叉口运行安全性有显著的影响。因此,改善交通设施、提高交通管理措施、骑行者安全教育、规范车型是提高交叉口交通安全性的可行措施。

英文摘要：

Mopeds violation behaviors become a terrible threat to the safety of vehicles and pedestrians at urban intersections. In order to develop efficient countermeasures, understand their traffic violation charac- teristics, this study videotaped three domestic intersections in Shanghai, Wuhan and Linyi. Results reveal that the violation rates of non-motorized vehicles in these three intersections are 50%, 70% and 40%, which is very severe. Rider gender, vehicle power, and traffic police present are correlated with moped violation characteristics. Male riders owe higher violation frequency than females; Fuel-powered vehicle riders violate more often than riders under other power （man-power or electricity-power） ; Violation rate is significantly higher when the traffic operators are not present. Traffic facilities, related traffic regulations and management, moped riders＇character and mixed traffic conditions are significant influential factors to mopeds safety at signalized intersections. Therefore, enhancement of traffic facilities and traffic management strategies, traffic safety education, standardization of vehicle type is, by this study, possible measures to improve traffic safety in signalized intersections.