Motor vehicle speed management and speed control will play a central role in achieving a safe overall environment. This gap in the regulation of the industry should be closed as quickly as possible. Mandatory driving ability tests for bus drivers are being discussed. Again, these deliberations should be concluded as quickly as possible and regulation introduced. Research in Transportation Economics, Vol. Studie im Auftrag der MA 18 Stadtentwicklung und Stadtplanung, Endbericht, Municipality of Vienna.