The regular safety inspection of vehicles in service has been tested up to now not by a plate type (dynamic) inspection system but by a roller type (static) inspection system in our country (in Korea). Therefore, the roller type inspection can not reflect the inertia force that there is a load transfer from the rear axle to the front axle during braking. In this study, before introducing the plate type inspection system, the effect on braking force characteristics according to entering velocities of vehicles in service are evaluated statistically. As the results, the reliable entering velocity range is about from 7 km/h to 14 km/h. Also, the regular vehicle safety inspection in domestic country need to adopt the plate type (dynamic) braking force inspection system which can reflect the inertia force.