Determination and suitable remedial treatment methods of accident prone locations (blackspots) in the city of Colombo (Sri Lanka)

Abstract

The phenomenon of accident black spots has been recognised for many years. There is also considerable evidence to support the contention that the identification and remedial treatment of such sites proves extremely cost effective in accident reduction terms. David Silcock (1984) reported that in a County Council in U.K. an average first year Economic Rate of Return (ERR) of 148 percent was obtained for 147 black spots treated in the area. Nevertheless, the black spots approach to accident reduction represents only one of a number of low - cost engineering strategies in the road safety field. In this method, the locations where heaviest concentration of accidents occur are identified as those which require urgent attention, and remedial measures are carried out with economic justification.