This thesis presents an experimental investigation of a 1: 20 scale acrylic model to study the behavior of a multicellular box beam bridge system. The design of a 1: 2 scale concrete model is presented in the early part of the thesis. The acrylic model was tested under simulated AASHTO HS 20-44 loading. The load distribution characteristics of the bridge system was evaluated based on the strains and deflections at various points on the bridge model. The experimental results are presented by transverse distribution curves of strains and deflections for various load locations. Grillage analysis of the bridge system was performed and the results compared well with the experimental values.