Two decades ofimpacts of road safety strategies on driver travel speedbehaviours on WA road network

Thirteen annual speed surveys were conducted on the Western Australian road network over the period 2000 to 2018 to measure impacts of road safety strategies, in particular speed enforcement strategies, on driver speed behaviours on speed limit roads ranging from 50 km/h to 110 km/h. Effectiveness of speed road safety programmes was estimated in terms of changes in speed data indices (speed compliance rates, excessive speeding, 85th percentile and mean speed). When compared to the 2000 survey, the number of speeding drivers recorded in 2018 was reduced up to 73.3% in the Perth metropolitan area, and similarly but to lesser extent in the rural areas. Over the same period WA fatality crash rates have reduced by 47% from 1.07 in 2000 to 0.54 fatalities/100MVKT in 2018.