Factors Affacting Vehicle Speed on Suburban Arterial
Keywords:
Vehicle speed, Speed enforcement, Physical factorsAbstract
Speed is a major contributing factor in a road crash. The objective of this study was to examine the factors affecting vehicles speed. Six vehicle types with speed limits of 90 80 and 60 km/h were observed on a suburban arterial in Khon Kaen before and between speed enforcement activities. Descriptive statistics and multiple regression analysis were applied to create models for indicating the factors influencing vehicle speed. The findings revealed that drivers have a broad speed range, with the 85th percentile speed not matching the speed limits. Generally, road geometries access control and traffic characteristics mainly affect vehicles speed. Speed enforcement with a portable speed detector results only in reduced passenger car and pickup truck speed.
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