Motorcycle safety barrier trials in South Australia: Case study
Motorcycle safety barrier trials in South Australia: Case study
Motorcycle safety barrier trials in South Australia: Case study
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Australasian College of Road Safety Conference – “A Safe System: Expand<strong>in</strong>g the Reach” Sydney 2012frequency and severity of “s<strong>in</strong>gle vehicle run off road” casualty crashes chiefly, be<strong>in</strong>g thepredom<strong>in</strong>ant type of crash <strong>in</strong> rural <strong>South</strong> <strong>Australia</strong>. However, the guard fence <strong>in</strong>stalled atsome locations, especially on curves has potentially become a new hazard for motorcycleriders. The process of identify<strong>in</strong>g motorcycle crash locations and provid<strong>in</strong>g them <strong>in</strong> mapformat helps identify crash ‘hot spots’. This site selection process attempts to look at patternsof motorcycle crashes <strong>in</strong> <strong>South</strong> <strong>Australia</strong> on popular motorcycle routes.The Adelaide Hills and <strong>in</strong> particular Gorge Road is recognized as popular for motorcycl<strong>in</strong>gdue to its geometry and amenity and vic<strong>in</strong>ity to Adelaide. The motorcycle numbers on GorgeRoad on weekdays can more than double on weekends as shown <strong>in</strong> Figure 2.Figure 2: <strong>Motorcycle</strong> count on Gorge Road for different days of the weekThe spatial locations of Gorge Road and Cudlee Creek Road are shown <strong>in</strong> Figure A,Appendix-A. Both roads were known to experience frequent motorcycle casualty crashes,sometimes <strong>in</strong>volv<strong>in</strong>g guard fence as detailed <strong>in</strong> Table 3. This <strong>in</strong>formation was supported bythe Road Safety <strong>Motorcycle</strong> Task Force and special speed surveys conducted by DPTI.3.1 Crash AnalysisThere have been numerous motorcycle crashes on Gorge Road and Cudlee Creek Road (bothtwo lane undivided sealed roads). Between 2001 and 2010, 56 motorcycle casualty crasheswere reported on Gorge Road result<strong>in</strong>g <strong>in</strong> 60 casualties, 8 fatal and 21 serious; and 21casualty crashes were reported on Cudlee Creek Road result<strong>in</strong>g <strong>in</strong> 1 fatality and 9 serious<strong>in</strong>juries as detailed <strong>in</strong> Table 3.Note the high number of motorcycle crashes per km per annum on these two roads relative tothe State average (at least 25 times greater) and the high crash severity ratio (FSI/TC) <strong>in</strong>toguard fence relative to all motorcycle crashes (approx 36% higher than State-wide).The ma<strong>in</strong> crash trends identified for motorcyclists on Gorge Road for the period 2001-10: 56 of the 126 total casualty crashes (44%) <strong>in</strong>volved motorcycles 52 of the 56 motorcycle casualty crashes occurred <strong>in</strong> dry conditions 52 of the 56 motorcycle casualty crashes occurred <strong>in</strong> daylight 49 of the 56 motorcycle casualty crashes occurred on a horizontal curve 19 of the 56 motorcycle casualty crashes (34%) <strong>in</strong>volved guard fence, result<strong>in</strong>g <strong>in</strong> 5fatal and 8 serious <strong>in</strong>jury crashesThe ma<strong>in</strong> crash trends identified for motorcyclists on Cudlee Creek Road for 2001-10: 19 of the 40 total casualty crashes (48%) <strong>in</strong>volved motorcycles<strong>Motorcycle</strong> <strong>safety</strong> <strong>barrier</strong> <strong>trials</strong> <strong>in</strong> <strong>South</strong> <strong>Australia</strong>: <strong>Case</strong> <strong>study</strong> – Adelaide Hills4
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