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The main objective of this paper is to study the dynamic load allowance(DLA)calculation methods for bridges according to the dynamic response curve.A simply-supported concrete bridge with a smooth road surface was taken as an example.A half-vehicle model was employed to calculate the dynamic response of deflection and bending moment in the mid-span section under different vehicle speeds using the vehicle-bridge coupling method.Firstly,DLAs from the conventional methods and code provisions were analyzed and critically evaluated.Then,two improved computing approaches for DLA were proposed.In the first approach,the maximum dynamic response and its corresponding static response or its corresponding minimum response were selected to calculate DLA.The second approach utilized weighted average method to take account of multi-local DLAs.Finally,the DLAs from two approaches were compared with those from other methods.