The Vehicle Speed Distribution on Heterogeneous Traffic: Space Mean Speed Analysis of Light Vehicles and Motorcycles in Makassar - Indonesia

This paper attempts to analyze the space mean speed characteristic of the light vehicles and motorcycles under heterogeneous traffic situation in Makassar, Indonesia. The present study conducts traffic survey at the four one-way urban roads in the city. The survey measures the vehicle speeds in morning peak hour using video camera. The speed distribution characteristic of the light vehicles and motorcycles are analyzed in following the normal distribution model. The parameters values of the distributions have been calculated using a simulation approach. The results show that the vehicle speed distributions follow the normal distribution. The statistical test results such F-test and t-test indicate that there are similarity and difference of the speed distributions, among thirty minutes interval in the morning peak period. We expect that the distribution models are useful in the development of traffic simulation model for vehicle emission and traffic noise prediction in further studies