Numerical simulations of shading effect and road-surface state



In winter road maintenance, accurate predictions of road-surface temperature and state (dry, wet, frost or ice) are valuable information for road authorities and organisations that decide where and when to salt or grit the road. The obstruction caused by bids, buildings and trees near the forecast site in daytime (the shading effect) largely reduces the accuracy of such predictions in daytime. This paper describes recent developments of the Icebreak Model and gives encouraging results of validation in surface temperature and state predictions of the model.