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A Safe System – the design challenge

A Safe System – the design challenge. Blair Turner, Principal Research Scientist. Overview. Safe System approach Engineering based solutions The role of speed management Primary treatments Supporting treatments What do we need to do from here?. The Safe System approach.

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A Safe System – the design challenge

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  1. A Safe System – the design challenge Blair Turner, Principal Research Scientist

  2. Overview • Safe System approach • Engineering based solutions • The role of speed management • Primary treatments • Supporting treatments • What do we need to do from here?

  3. The Safe System approach

  4. Safe System Framework • 5 star driving • 5 star cars • 5 star roads • 5 star speed limits

  5. Safe System approach • Road users will make errors • Death and serious injury not acceptable • Need to provide infrastructure that prevents fatal and serious crashes by reducing the incidence and severity of crashes • There are limits to the forces the human body can withstand in the event of a crash • Speed management has an important part to play in this

  6. Speed limits – safe system • Speed limits should take account of the biomechanical tolerances of humans

  7. Speed limits – safe system • Suggested speeds to cater for human tolerance:

  8. Engineering based treatments

  9. Primary road safety treatments Treatments that deliver Safe System outcomes – minimise deaths and serious injury Supporting treatments Treatments that provide a safety benefit, but don’t necessarily reduce death or serious injury to ‘near zero’

  10. Head-on crashes Survivable speed – 70 km/h Primary road safety treatments • Barrier systems Supporting treatments • Shoulder sealing • Audio-tactile edge and centrelines

  11. Head-on crashes Survivable speed – 70 km/h

  12. Pedestrian crashes Survivable speed – 30 km/h Primary road safety treatments • Separation • Grade separation • Footpaths • Raised crossings Supporting treatments • Warning signs • Pedestrian refuge

  13. Pedestrian crashes Survivable speed – 30 km/h

  14. Motorcycle / cycle crashes Survivable speed – 30 km/h Primary road safety treatments • Separation • Off-road facilities Supporting treatments • On-road facilities • Warning signs

  15. Motorcycle / cycle crashes Survivable speed – 30 km/h

  16. Intersection crashesSurvivable speed – 50 km/h Primary road safety treatments • Grade separation • Roundabouts • Raised platforms Supporting treatments • Advance warning • Traffic signals

  17. Intersection crashesSurvivable speed – 50 km/h

  18. Roadsides – run-off-road crashesSurvivable speed – 40-50 km/h Primary road safety treatments • ‘Clear zone’ • Removal of roadside hazards • Frangible roadside structures • Barrier systems Supporting treatments • Warning signs • Shoulder sealing • Audio-tactile edgelines

  19. Roadsides – run-off-road crashes Survivable speed – 40-50 km/h

  20. Further info on safety treatments: www.irap.net/toolkit

  21. Challenges to implementation • Cost • Primary treatments tend to be most expensive • Need to develop low cost primary treatments • Timeframe • Community and political support

  22. Summary • Safe System approach required • Speed management very important • Improvements to infrastructure can provide Safe System outcomes • Primary treatments – need greater use of these • Supporting treatments • Cost

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