טכניון מכון טכנולוגי לישראל
הטכניון מכון טכנולוגי לישראל - בית הספר ללימודי מוסמכים  
M.Sc Thesis
M.Sc StudentBen Zvi Shelly
SubjectSelf-Enforcement of Driving Speed
DepartmentDepartment of Civil and Environmental Engineering
Supervisors Dr. Robert Ishaq
Professor Yoram Shiftan
Full Thesis textFull thesis text - English Version


Abstract

Car accidents and their impacts remain an international concern. Speeding and speed variance are considered as one of the major causes of car crashes and their severity. With the assistants of recent year's state of the art Electronic In Vehicle Data Recorders (IVDR),the option to monitor and relay real time feedback to the driver has become feasible. Previous studies have reported the benefits achieved from using these devices. This research suggests a new approach to self-enforcement of speed limits based on the hypothesis that certain small penalties are more effective than certain larger penalties in increasing device usage and acceptance. In order to overcome the "Big Brother" privacy concern, the option to connect and disconnect the devices is given at any point. Our experiment tested the influence of fine size on the device usage rate, average speed and speed variance. 132 Technion students were recruited in exchange for monetary compensation (15-25 NIS). The students participated in a computerized speeding dilemma task where they could control the speed of their "car" using "brake" and "speed" buttons corresponding to automatic car foot pedals. The experiment included 12 trips. Each trip lasted 40 seconds. After each two seconds step, the participants received feedback on their speed and points. The basic step payoff ranged between 2.5-4.5 points. The faster that participant's speed was, the higher their basic step payoff was. Nevertheless, the higher the speed, the higher the chances of accident occurrence was. Whenever an accident occurred, -100 points were subtracted from the participant's accumulated payoff. After two 40 seconds steps, the participants were informed that the optimal speed was 90kph and that IVDR also known as the Green Box was installed in their vehicle and that they could turn it off at any time. The participants were randomly allocated to two experimental conditions. The large fine group received -20 points fine whenever they passed the speed of 100kph while the small fine group received -1 points fine whenever they passed this speed. The results indicated higher device acceptance rate among the small fine group, meaning that the large fine group turned off the device more. Moreover, the speed variance in the large fine group was higher than the speed variance in the small fine group. These result support the notion that small fines are more effective than large fines in increasing device use, lowering speed variance and ultimately improve road safety.