Estimation of the optimum speed on urban residential streets
Summary
The optimum speed is defined as one which balances the social costs and benefits of increased travel time with decreased road trauma, vehicle operating costs, emissions, etc. The project focused on urban residential streets with 60 kmh speed limits because of the availability of a considerable amount of relevant basic data. Three different methods were considered to measure the impact of travel speed on road trauma and/or crash costs (Kloeden et al 1997, Nilsson 1984, Kallberg and Toivanen 1998).