Investigation on the Cost-Effectiveness of Speed Bumps

抄録

This study evaluates the cost-effectiveness of speed bumps in Sri Lanka by analyzing travel time increment costs, driver discomfort costs, and accident costs before and after installation. It examines two case study locations: a residential area and a mixed residential-commercial area aimed at costs of travel time increment, driver discomfort and accidents. Both sites were selected based on their need for traffic calming. Data collection included speed measurements, accident records, stakeholder interviews, and surveys to assess economic and safety impacts. Findings indicate that speed bumps significantly reduce accident costs, with an 86% decrease in the residential area and a 50% decrease in the mixed-use area. However, minor economic burdens were observed, with travel time cost increments and minimal driver discomfort costs. Overall, the study concludes that speed bumps are cost-effective, as accident cost reductions outweigh the additional expenses.