Spatial & Temporal Investigation of Road Accidents in Karachi

Uneb Gazder,Muhammad Adnan and Muhammad Ahmed

Road accidents are one of the leading causes of deaths in the world. Approximately 1.3 million people die each year due to road accidents worldwide and some 20 to 50 million people sustain non-fatal injuries. Identification of accident causes on spatial and temporal bases may provide a sound approach to find out ways to mitigate number and severity of accidents. Spatial basis refers to the analysis of accidents based upon its location whereas temporal basis refers to the analysis based upon timings of accidents. We have applied spatial, temporal and spatia-temporal techniques to investigate the pattern of accidents in Karachi between years 2008 to 2012. It was found that road traffic injuries and fatalities rates are higher in day times as compared to night. The spatial trend of accidents was also analyzed between commercial and residential areas. It was found that road traffic injuries are higher in commercial areas as compared to residential ones. Moreover, it was also found that road traffic accidents at mid-blocks are statistically different and lower than intersections. Consequently, it was tested whether the road accidents are related to the traffic volume. It was found the frequency of injuries related to traffic accidents (fatal and non-fatal) also increase with the increase in traffic volumes. This conclusion is consistent with the spatial and temporal hypotheses. Therefore, it is recommended to improve the design and traffic management practices in high­ volume areas/timings, including; peak hours, commercial areas and intersections.