Attitudes of Drivers towards Speed Enforcement Measures on Bangkok Expressways

This study investigates drivers’ feelings or attitudes toward the implementation of speed enforcement programs on Bangkok expressways. 1,169 car drivers and 62 truck drivers on the expressways were interviewed using a self-reported questionnaire. The interview questions include their socio-economic and driving characteristics, as well as their agreement with stricter speed enforcement policy and if they would reduce their speeds due to different scenarios. The data show that 84% of car drivers and 76% of truck drivers are either agree or neutral with stricter enforcement policy, and both automatic speed camera and police surveillance would be closely effective to induce driving speed reduction, while a text message warning sign and media advertisement will have much less effect. The linear and ordered probit regression analyses show several important relationships among drivers’ socio-economic and driving characteristics with their maximum driving speeds, accident rates, number of speeding tickets, preferred enforced limits, and agreement to stricter policy. The information from this research would assist policymakers in developing appropriate effective speed enforcement schemes on the expressways.