Analysis of Actual Versus Permitted Driving Speed: a Case Study from Glasgow, Scotland

With a lack of consistent information about actual driving speed on the majority of roads in the UK we propose a method to determine car speeds from a sample of movement data from a GPS-based travel survey. Furthermore, we identify potential road links within a road network where speeding incidents take place. Speed at which a car travels is a strong determinant in the potential risk of a crash as well as the severity of the crash. Using the GPS movement data we can detect areas in the city of Glasgow where the driving speed exceeds the permitted limits and thus identifying possible areas of higher crash risk