Road tolling plays a significant role on highways’ financial sustainability since it consists the major revenue source. This paper aims to examine the factors that affect the drivers’ route choice and urge them to avoid toll roads when an alternative toll-free route is available. The paper presents the results of a case study that is dealing with the issue of toll avoidance at the last non-privatized highway of Greece, the Egnatia Odos (EO) road. Data from a combined revealed and stated preference survey were collected and binary choice models were built for car and truck drivers so as to determine the utility of alternative routes. The results show that travel cost and toll fees are critical route choice criteria for car drivers, while travel time is a key decision factor for truck drivers. The high safety standards for the toll route were appreciated by both categories of drivers. Additional trip and personal characteristics, such as gender, trip frequency, type of transported cargo, and total trip length also affect drivers’ choices. The elasticity of travel time and cost was estimated to shed light on drivers’ sensitiveness to the route attributes and it was found that truck drivers’ choices are greatly influenced by their working time schedules. These findings highlight the key factors that influence the utility of toll roads and therefore could assist highway authorities and concessionaires in developing successful toll pricing policies which will not act as a deterrent to the use of highways.

由于公路收费是主要的收入来源，因此对高速公路的财务可持续性起着重要作用。本文旨在研究影响驾驶员路线选择的因素，并在有替代免费电话路线时敦促他们避开收费公路。本文介绍了一个案例研究的结果，该案例研究了希腊最后一条非私有公路Egnatia Odos（EO）公路上的收费避免问题。收集了来自公开和陈述的偏好调查的数据，并为汽车和卡车驾驶员建立了二元选择模型，以确定替代路线的效用。结果表明，出行成本和通行费是汽车驾驶员关键的路线选择标准，而出行时间则是卡车驾驶员的关键决策因素。两种类型的驾驶员都对收费公路的高安全标准表示赞赏。其他出行和个人特征（例如性别，出行频率，运输的货物类型和总出行长度）也会影响驾驶员的选择。估计出行时间和成本的弹性可以揭示驾驶员对路线属性的敏感性，并且发现卡车驾驶员的选择在很大程度上受到其工作时间安排的影响。这些发现凸显了影响收费公路实用性的关键因素，因此可以帮助公路当局和特许经营者制定成功的收费政策，而不会影响高速公路的使用。运输货物的类型以及总行程时间也会影响驾驶员的选择。估计出行时间和成本的弹性可以揭示驾驶员对路线属性的敏感性，并且发现卡车驾驶员的选择在很大程度上受到其工作时间安排的影响。这些发现凸显了影响收费公路实用性的关键因素，因此可以帮助公路当局和特许经营者制定成功的收费政策，而不会影响高速公路的使用。运输货物的类型以及总行程时间也会影响驾驶员的选择。估计出行时间和成本的弹性可以揭示驾驶员对路线属性的敏感性，并且发现卡车驾驶员的选择在很大程度上受到其工作时间安排的影响。这些发现凸显了影响收费公路实用性的关键因素，因此可以帮助公路当局和特许经营者制定成功的收费政策，而不会影响高速公路的使用。