Mixed traffic flow with high composition of motorcycles is a common situation in most Asian countries such as Taiwan, Thailand, Vietnam and Malaysia. To date, there are approximately 7.5 million of registered motorcycles in Malaysia and motorcycle ownership in Malaysia has increased from 0.13 in year 1990 to 0.28 motorcycles per person in year 2006. Observation in the field indicates that motorcycles can traverse through signalised intersections in certain distinctive ways as compared to other motorised vehicles. In this study, motorcyclists travelling through an intersection was divided into those within the flow and those outside the flow. Motorcycles within the flow follow a first-in-first-out rule, implying that they travel either in front of or behind other vehicles in the traffic stream. Motorcycles outside the flow are those that do not follow the first-in-first-out rule. This study attempts to investigate the effect of these motorcycles travel behaviour on saturation flow rates at signalized intersections. The results showed that motorcycles inside flow should be considered in the estimation of saturation flow rates. (a) For the covering entry of this conference, please see ITRD abstract no. E217099.
Abstract