Due to the di culties of the description of temperature varia- tion, rating of asphalt pavement structures respecting fatigue is made on equivalent temperature. In general, equivalent temper- ature is calculated according to average and weighted air tem- perature. It is proven, based on processing numerous data pro- vided by the temperature detectors laid in the pavement struc- tures as well as determination of the partial fatigue values, which the present method used to calculate the equivalent tem- perature results in data losses. Furthermore, it is proven, that pavement structure temperature based on air temperature can be determined only to limited extent. Knowledge of temperature distribution of the pavement structure provides the possibility of more accurate design.