This study is designed to measure the impact of a car’s horse power and torque - aspects related to performance among various factors that affect consumer purchase decision-on consumers when buying a car. The research of the results can be interpreted as indicating that the premise, “The impact of torque and horsepower on consumer purchase decision is not significant,” is true.

The impact factor response spectrum of bridges are generated based on the number of vehicle axles (one and three axles) and their boundary conditions (simply supported and both ends-fixed). In order to investigate the impact factor variation, a RC slab bridge aged over 40 years is considered. The natural frequencies for the current and undamaged initial state are evaluated from field test and FE model, respectively. Considering the natural frequencies and the generated response spectrum, the impact factors for each state are determined. From the result, the impact factor ratio defined the current to initial impact factor are almost same except the one axle and both ends-fixed case.

For the evaluation of load carrying capacity of continuous bridges, the testing target span should be selected where peak impact factor can be expected. In this paper, two and three continuous bridges with equal span length are considered and the moving vehicle load analysis is performed. All possible vehicle speeds are applied to the bridges and the peak impact factors obtained for each span are investigated. From the results, the maximum peak impact factors are developed at the middle of the first span to the direction of vehicle moving.