Abstract
Spatio-Temporal Analysis on Urban Traffic Accidents: A Case Study of Tehran City, Iran
Highlights
Evaluation of the results shows that urban zones with commercial and administrative land use, and suburban zone with industrial land use are very dangerous with respect to both fatal and injurious Urban Traffic Accidents (UTAs)
As variation in the distribution of UTAs occurs within a 24-hour period through the urban structure (US), there is a disparity in UTA frequencies among the different factors, of which land use, population, road types and time were the most associated factors in this study
There is a significant variation in the occurrence of UTAs through the US which is 3 zones (CBD, urban zone and suburban zone), as well as time
Summary
The normalized rates of UTAs per 1000 population or the total number of vehicles still show very high fatality and injury rates in Tehran, which signal a significant traffic safety problem that should be addressed and analyzed to find contributing factors. Identifying high probability UTA areas is an important issue of traffic safety programs, because precautions and infrastructure assessments can be prioritized at these locations to create more efficient resource allocations. Such areas are called “black spots” or “hotspots” in the UTA literature [3] and generally they are detected by clearly defined methods. The “hotspot” definition can vary according to the focus of the analysis
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