The project was focused on analysis of causes of traffic accidents influenced by construction conditions of road infrastructure and bridges, their equipment, obstacles, and management and organization of traffic. Its main goal was to develop the methodological tool for owners and administrators of roads and bridges, generally indicating to often banal and sometimes fatal causes, which lead to occurrence of accidents and their serious consequence. This document presents whole range of aspects of accident rate on roads and bridges, including conflicts of a vehicle with a solid obstacle, a vehicle with another vehicle, or a vehicle with a pedestrian, focusing on conditions, which helped to human error. The project also deals with possibilities of applying intelligent transport technologies in order to improve safety in the framework of so-called e-safety projects.