Abstract
Accidents are in rising mode and became the main problem in all over the world, especially in Malaysia. Many reasons have contributed to an accident including the condition of the road, driver’s behavior and the environment of the road that may lead the drivers to make a lane changing. Lane changing is a process that experienced by all drivers such as in U-turn segment. In approaching U-turn segment, drivers need to make a decision whenever any disruption in front of them such as diverge vehicle because they have their own perspective and desire. However, the lane changing model in approaching U-turn road segment yet to develop. Therefore, this study will develop a model to determine the relationship between the reaction time (RT), speed (V) and distance from the behind vehicle to the front vehicle due to the changing lane at U-turn facility road segment. For that purpose, this study is focusing on the safe distance entry of a vehicle to the fast lane with the fast lane and slow lane vehicles before make a decision to change the lane in this U-turn facility. The data will be taken from the field and driving simulator. The equipment to be used to collect the field data is automatic traffic counting (ATC), controller area network-bus (CAN-bus), radar gun and video recording. The video recording will be used to simulate the driving simulator. Furthermore, driving simulator will be used to achieve the objective of the study. Regression analysis will be done for final model for estimating the safe distance entry of a vehicle to the fast lane with the fast lane and slow lane vehicles before making a decision to change the lane in this U-turn facility road segment to make sure that the model development is valid. Finally, the model can be used to estimate the safe distance for the road user to slow down their rate of speed while approaching the U-turn facility road segment and can be used to estimate the speed and safe distance in lane changing process.
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