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Guidance on Median and Centreline Treatments to Reduce Head-on Casualties

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Publication no: AP-R519-16 Pages: 79
Published: 07 June 2016


This report presents a compendium of local and overseas practice and experience in minimising the risk and severity of head-on crashes. It is intended to assist road safety practitioners identify effective actions that can be taken to reduce the incidence and severity of such crashes, with a focus on median and centreline treatments.

In addition to discussing well-proven methods to address head-on crashes, this report also presents some innovative treatments for which there is currently insufficient data to confirm their benefits, but which may be effective in reducing head-on crashes where the crash history does not justify the expense of applying more established treatments.


Table of Contents

Summary
1. Introduction
  • 1.1 Background
  • 1.2 Key Contributing Factors
  • 1.3 Intent of the Report
  • 1.4 Structure of this Report
  • 1.5 Crash Modification and Reduction Factors
  • 1.6 Approved Safety Barrier Products
2. Centreline Treatments
  • 2.1 Standard Dividing Linemarkings
  • Crash modification
  • Treatment life
  • 2.2 Raised Profile Centrelines
  • Crash modification
  • Treatment life
  • 2.3 Raised Profile Centrelines and Edgelines
  • Crash modification
  • Treatment life
  • 2.4 Enhanced Pavement Markings
  • Profiled thermoplastic centreline stripes
  • Cold applied plastic materials
  • Road marking tape
  • Crash modification
  • Treatment life
  • 2.5 Raised Reflective Pavement Markers
  • Crash modification
  • Treatment life
  • 2.6 Internally Illuminated Pavement Markers
  • Crash modification
  • Treatment life
3. Median Treatments
  • 3.1 Painted Median
  • Crash modification
  • Treatment life
  • 3.2 Pavement Bars
  • Crash modification
  • Treatment life
  • 3.3 Wide Centreline Treatment
  • Crash modification
  • Treatment life
  • 3.4 Raised Median
  • Crash modification
  • Treatment life
  • 3.5 Barrier Kerbing on Median
  • Crash modification
  • Treatment life
  • 3.6 Median Barriers
  • Crash modification
  • 3.6.1 Rigid Median Barriers
  • 3.6.2 Semi-rigid Median Barriers
  • 3.6.3 Wire Rope Median Safety Barriers
  • 3.6.4 2+1 Roads
  • 3.6.5 Moveable Barriers
  • 3.6.6 Motorcyclist Concerns with Median Barriers
  • 3.6.7 Median Barrier Terminal Treatments
  • 3.7 Flexible Bollards
  • Crash modification
  • Treatment life
  • 3.8 Median Turning Bays
  • Crash modification
  • Treatment life
  • 3.9 Median Design
  • 3.9.1 Median Width
  • 3.9.2 Cross-section
  • 3.9.3 Pavement Edge Drop-off
  • 3.9.4 Median Shoulder
  • 3.10 Median Glare Treatments
  • Crash modification
  • Treatment life
  • 3.11 Median Plantations
  • Crash modification
  • Treatment life
4. Other Road Infrastructure Solutions
  • 4.1 Speed Management
  • Crash modification
  • Treatment life
  • 4.2 Intermittent Overtaking Lanes
  • Crash modification
  • Treatment life
  • 4.3 Improved Pavement Surface
  • Crash modification
  • Treatment life
  • 4.4 Shoulder Treatments
  • Crash modification
  • Treatment life
  • 4.5 Improved Roadside Forgiveness
  • Crash modification
  • Treatment life
  • 4.6 Curve Delineation and Warning
  • Crash modification
  • Treatment life
  • 4.7 Addressing Wrong-way Movements
  • Crash modification
  • Treatment life
5. Conclusion
References
Appendix A Summary of Treatments
Appendix B Other Countermeasures to Address Head-on Crashes
B.1 Driver Interventions
B.1.1 Fatigue Management
B.1.2 Driver Distraction
B.2 Vehicle-based Treatments
B.2.1 Front Underrun Protection
  • Crash modification
B.2.2 Anti-lock Braking Systems
  • Crash modification
B.2.3 Electronic Stability Control
  • Crash modification
B.2.4 Lane Departure Warning
  • Crash modification
B.2.5 Collision Warning and Prevention Systems
  • Crash modification
B.2.6 ANCAP

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