Computer model sees birth of the virtual road-hog

RANSPORT

Computer model sees birth

of the virtual road-hog

Virtual road-hogs have been created in the first computer-generated traffic model to simulate the temperament of drivers. The programme is able to categorise motorists as "timid", "ideal", "normal", "impatient" or "aggressive". If adjusted to worsen motorists' driving by making them more aggressive or hesitant, it is possible to set up crashes. Jams, road blockages, and the effect on traffic of slow or speedy vehicles can also be reproduced.

The model, invented by computational physicist Dr Laurence Howe, is designed to help motorway planners by simulating realistic traffic situations. Other computer models show the effect of dense traffic flow, hold-ups and speed limits. But Dr Howe's system adds a human dimension by including motorists' moods.

Drivers' characteristics are determined by factors like how close they approach the vehicle in front, the speed at which they change lanes, and their personal reaction times to incidents. Details of the different types of vehicle, describing their speed, engine power, weight, length and braking time, are also entered.

Dr Howe will present the model tomorrow at the Institute of Physics Annual Congress in Leeds.