Abstract
The heat and moisture transfer between bridge road surface and atmosphere is explored from indoor experiments and survey on a real bridge road, in order to prevent bridge road freezing. It is observed that the surface temperature of the real bridge road is mainly affected by the sky radiation, the road surface long-wave radiation and the pavement heat conduction, when the wind is weak.
Finally, the reason, why a steel bridge road is apt to freeze com-pared to a concrete bridge road, is discussed from the time change of the heat energy budget and of the internal energy of the bridge floors.
