中文摘要：

研究铁路到达旅客在枢纽内外部环境影响下的离站交通方式选择问题,是合理配置交通系统资源的关键问题之一.但是目前已有的方式选择模型对服务水平因素的考虑还不足.针对这一问题,首先分析了到达旅客离站交通方式选择机理,并定义服务水平期望作为服务水平因素变量;然后在效用函数中引入服务水平期望变量,建立了改进的离站交通方式选择NL模型;最后根据成都东客站调查数据,通过编程进行模型验证.结果表明,改进的离站交通方式选择NL模型具有较好的精度,但是由于选择数学期望值作为服务水平期望,使得公共交通方式的拟合值比调查值略低.因此在服务水平期望指标值的选取方面有待改进.

英文摘要：

Passenger＇s off-site mode choice behavior is one of the key issues related to the rational traffic resource allocation.The existing mode choice models consider less on the level of service factors.To solve this problem,this paper first analyzes the off-site mode choosing mechanism of arriving passengers,and defines the service level expectations as service level factor variables.Then,it introduces the service level expectations variables into the utility function and formulates the improved off-site mode choice NL model.Finally,the model is validated with the survey data which is obtained in Chengdu East Railway Station,China by programming.The results prove the good accuracy of the improved mode choice model.However,the fitted value of public transport is slightly lower than the survey value.This is possibly because the mathematical expectation is used as the service level expectations values.Therefore,there are still some areas for improvement in the service level expectations index value selection.