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Adelaide University / Centre For Automotive Safety Research / Publications / List / Details Publication Details| Title | Driver behaviour preceding crashes at stop or give way sign-controlled intersections | | Authors | Thompson JP, Stokes CS, Elsegood ME | | Year | 2026 | | Type | Report | | Abstract | Right-angle crashes, in which a driver fails to give way to another road user, are common at stop and give way sign-controlled intersections. This report investigated the driver behaviour and circumstances that lead to these crashes. Casualty crashes investigated by the Centre for Automotive Safety Research (CASR) in South Australia (2014-present) were analysed. At-fault drivers in 57 right-angle crashes did not statistically significantly differ from those in 375 other types of crashes in their likelihood of testing positive for alcohol or drugs or having passengers. Their vision of the other road user was restricted in 26 crashes. In 33, they slowed or stopped at the intersection before moving into the path of the other road user (16 looked-but-failed-to-see). In 19, they proceeded straight into the intersection without slowing or stopping, and the most common circumstance for these drivers was that they were unfamiliar with the road (11 crashes). Crash histories of the 50 intersections across SA at which right-angle crashes were investigated by CASR were examined and more than 20 right-angle crashes occurred at each of ten intersections (three had 30 or more) during the prior ten years. Safety can be improved through superior intersection design (e.g., grade separation to remove conflict) and treatments that increase driver awareness of the intersection or reduce crash forces to within human biomechanical tolerance to harm. Practical considerations, such as treatment costs and predicted effectiveness, are also important. | | Report Number | CASR223 | | 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 56 9 | | ISSN | 1449-2237 | | Page Count | 51 |
| Reference | | Thompson JP, Stokes CS, Elsegood ME (2026). Driver behaviour preceding crashes at stop or give way sign-controlled intersections (CASR223). Adelaide: Centre for Automotive Safety Research. |
| Files Available for Download | | CASR223.pdf | Published report |
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