Swift or safe? That may be the question drivers with navigation systems ask themselves in future.
A new study by researchers at the University of Toronto Intelligent Transportation Systems (ITS) Centre and Testbed suggests in-car systems, designed to guide drivers around traffic jams and accidents quickly, could actually cause a temporary surge in the risk of accidents. "Discovering that traveller information systems may be good for travel time but not for overall safety was shocking because they are generally supposed to provide benefits," says Professor Baher Abdulhai, the director of the ITS Centre and Testbed in the Department of Civil Engineering.
Using computer simulations of route guidance systems, Abdulhai’s team found accident risks peaked immediately after drivers were informed of traffic congestion and changed their routes. "There was an increased level of activity as people ’bailed out’ to bypass congestion," says Abdulhai - for example, as drivers left a jammed freeway for city streets and encountered accident-prone intersections. However, because drivers reach their destination sooner, the accompanying drop in accident risk eventually counterbalances the earlier surge.
Nicolle Wahl | EurekAlert!
Further information:
http://www.utoronto.ca
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