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Inner West Council in Sydney recently completed a data collection study as part of their InnerWest@40 project. The study provides rigorous data-driven evidence to support a reduction of speed limits across the LGA to significantly improve road safety for all road users, particularly pedestrians and cyclists.
The project combined data from the council, NSW Open Data Hub, and Compass IoT to investigate a reduction of the speed limit on local streets from 50km/h to 40km/h. Specifically, the Inner West Council wanted to understand speed and near-miss data across the entire LGA.
A heat map showing speed reduction priority locations. Image from BECA.
A map of Compass 85th percentile speeds. Image from BECA.
Compass speed data showed that almost 60% of traffic across local road segments traveled at or below 40km/h. Reducing the posted speed from 50km/h to 40km/h would be an accurate reflection of the existing traffic environment. Near-miss data also correlated well with crash statistics for the inner west.
Recorded near-misses caused by braking, swerving, or both. Image from BECA.
As a result of the study, the council is now considering next steps within areas flagged as high priority. The LGA-wide speed reduction strategy has the potential for significant economic benefits in the costs associated with the reduction of road trauma, savings in crash costs, reduced emissions, promotion of active transport and an increase in existing amenity and place-making opportunities.
Looking at crash cost savings only, a potential estimate of 30% reduction in all injuries could result in estimated savings of:
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