Longitudinal evaluation of the system performance of a junction safety system with public buses

When a vehicle makes a turn at a traffic junction, and views of oncoming vehicles and pedestrians are obstructed by other vehicles, some drivers would inch forward to get a better view — which could result in dangerous situations. The Junction Safety System is designed to provide information to drivers to help them navigate traffic junctions safely. The system sends out messages to On-Board-Units installed in the vehicles to warn the drivers when oncoming vehicles and at-risk pedestrians are detected. To evaluate the effectiveness of the system, a trial was conducted with public buses in Singapore. The trial consisted of two groups of buses to determine the effect of introducing the system — one group was installed with warning displays, and the other group was not installed with warning displays. System message latency and accuracy are also reported in this paper. The results showed that the Junction Safety System can improve the safety of drivers navigating a traffic junction.

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