Stamatis Halapas, “Sensitivity analysis of Greek drivers’ stated preference towards enforcement for road safety”, Diploma Thesis, NTUA, School of Civil Engineering, Athens., October 2001.

This diploma thesis deals with the investigation of the sensitivity of Greek drivers’ stated preference on road safety police enforcement. The definition of the objective was followed by bibliography research, which led to the development of methodology used. A questionnaire-based survey was carried out based on the stated preference technique. The drivers of the sample had to choose one out of three alternatives in five scenarios of trip time increase due to police enforcement intensification. Logistic regression was used for the analysis of the survey results, which led to the development of a mathematical model predicting the probability that the average Greek driver would choose the fine due to speed limit and overtaking violations at the national road network. Additionally, the Greek driver attitude is influenced by his age and annual family income, as well as by the trip purpose and duration. More precisely, the percentage of choosing the fine becomes greater as the driver age decreases, as his family income increases and when the trip purpose is business. It is worth mentioning that in 5-hour trips the percentage of Greek drivers opting to pay the fine is lower than the equivalent percentage for 2-hour trips when the trip time does not exceed a 40% increase of the base trip time. This trend is inverted for trip time increase of more than 40% of the base trip time. The results of this diploma thesis can be very useful for the identification of the optimum degree of intensification of police enforcement for the improvement of road safety.