Dynamic analysis of highway bridges for the moving vehicles is often made using number of simplifications. Most of the bridges are either of uniform or non-uniform cross sections and are modeled as straight beams with elastic or rigid supports and their mass is either elastically attached or distributed throughout. Obtaining the exact solutions even after this simplification is tedious and it becomes still more complicated when an account has to be made for various other parameters on which the dynamic behaviour of the bridges and vehicles depend. These parameters include the surface roughness, stiffness, mass and damping characteristics of the bridges; speed, spring stiffness, mass, number of axles and damping characteristics of the vehicle, etc. Hence, approximate iterative procedures are adopted for evaluating the response. This paper presents the development of a computer program catering for the computer-aided analysis of dynamic response of continuous span highway bridges. The program developed is capable of calculating the dynamic bending moments, dynamic shear force and dynamic deflections with corresponding dynamic amplification factors (DAF). The results for some typical bridges are presented in the form of tables and graphs. Further, the existence of a shallow area of settlement in approach road may lead to impact factors appreciably greater than those usually considered in bridge design, especially for sprung loads. It is observed from the results that the dynamic amplification factors increase with vehicle speed, span, length and road surface roughness.