This thesis describes and implements the complete procedure of load testing of typical overpasses. Load testing is very often and mandatory procedure before bridges are opened for traffic and it can be divided into static and dynamic part of testing. Static load test is based on the measurement of bridge displacements caused by the test load. Dynamic load test is based on determination of the dynamic parameters and measurement of the bridge response to the dynamic excitation in real conditions of use. The topic of the thesis is covered by the following chapters: The first chapter describes the structure, geometric characteristics and material of which the bridge is built. The second chapter describes the regulations covering the testing of bridges with test load. The third chapter covered the description of the test program including all the phases of test loading. The fourth chapter describes the numerical model as well as the numerical analysis of the overpasses The fifth chapter deals with presenting of the experimental test results. The sixth chapter compares the numerical and experimental results. Seventh chapter gives the final conclusion on the overall behavior of the structure.