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home / centre for automotive safety research / Publications / List / Details Publication Details| Title | Speeds in intersection crashes using EDR data | | Authors | Doecke SD, Elsegood ME, Ponte G | | Year | 2025 | | Type | Report | | Abstract | Safe speeds are considered a key part of a safe transport system. Speeds in intersection crashes are of particular importance due to their commonality and the risks associated with the impact types that occur in intersection crashes. The aim of the research described in this report was to use EDR data from the CASR-EDR database to examine the travel and impact speed of vehicles involved in crashes at intersections. A further aim was to examine how certain intersection features may influence these speeds. The median and 85th percentile speeds were calculated by speed zone using EDR data from 104 striking vehicles. The risk of serious injury in an intersection crash at these impact speeds were also calculated. Crashes that occurred in 50 and 60 km/h speed zones (n=88) were further analysed by crash type, intersection type and traffic control. The risk of serious injury in intersections crashes was found to increase with speed limit. Initial outcomes of this study indicate that crashes occurring in intersections zoned at 70 km/h or less, limit the risk of serious injury of the median impact speed to below 1%. However, to limit the risk of serious injury to lower than 1% considering the 85th percentile impact speed, the speed limit through intersections must be 50 km/h or less. Roundabouts produce the lowest impact speeds of any intersection type or traffic control in 50 and 60 km/h zones, though this result should be confirmed with a larger sample. | | Report Number | CASR227 | | Publisher | Centre for Automotive Safety Research | | Publisher City | Adelaide | | Sponsor | This research was funded via a deed with the South Australian Government | | ISBN | 978-1-925971-60-6 | | ISSN | 1449-2237 | | Page Count | 14 |
| Reference | | Doecke SD, Elsegood ME, Ponte G (2025). Speeds in intersection crashes using EDR data (CASR227). Adelaide: Centre for Automotive Safety Research. |
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