טכניון מכון טכנולוגי לישראל
הטכניון מכון טכנולוגי לישראל - בית הספר ללימודי מוסמכים  
M.Sc Thesis
M.Sc StudentSofya Rozenshtein
SubjectEvaluation of Drivers' Impatience on Two-Lane Rural
Highways
DepartmentDepartment of Civil and Environmental Engineering
Supervisor Full Professor Polus Abishai
Full Thesis textFull thesis text - English Version


Abstract


For the last few years interest in investigating driver behavior as it relates to the decision making process during driving has increased. Many recent studies in transportation engineering have been dedicated to this subject. The current study aspires to be another contribution to the growing body of knowledge in this area.

The main purpose of the study was to estimate the decision making process of drivers during passing maneuvers performed on two-lane rural highways, using only traffic characteristics. By limiting the input data in this way, the findings and their implications become applicable to any two-lane road segment.

On two-lane highways, when traffic volume increases, drivers may be unwilling to travel in platoons, resulting in an increased willingness to execute risky passing maneuvers. This phenomenon has been called “drivers’ impatience”. The study proposes an empirical method for evaluating drivers’ impatience using the concept of a critical passing gap. It was found that the critical passing gap has a bounded decreasing function determined by the total traffic volume or the volume in the oncoming lane. The critical passing gaps were found to be Log-Normally and Normally-distributed with an average value of 16.5 seconds, and a standard deviation of 5.5 seconds.

An additional objective was to evaluate drivers-following models. It was found that the drivers-following models, such as percent spent-time-following and traffic intensity, proposed in this study overestimate values, relative to the observed traffic performance due to unexpected passing maneuvers performed by impatient drivers. Finally, the study identified the impact drivers’ impatience has on drivers-following, and on traffic safety on two-lane rural highways.