Motorway lane and network control systems are modern tools of efficient traffic management. The basic structure of the Hamburg motorway network is motorway A1 and A7. This analysis represents the basis for finding critical motorway sections which are promising for additional traffic engineering measures. The accident situation of all Hamburg motorways were analyzed by accident rate density to get an idea of the most useful area to in which concentrate analysis of the accident situation and to implement traffic engineering measures. Accident rate and density were evaluated for all traffic accidents with fatalities and casualties in 1999.