Road safety

Cover of Guidance on Median and Centreline Treatments to Reduce Head-on Casualties
Guidance on Median and Centreline Treatments to Reduce Head-on Casualties
  • Publication no: AP-R519-16
  • ISBN: 978-1-925451-13-9
  • Published: 7 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.

  • 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
    • 2.2. Raised Profile Centrelines
    • 2.3. Raised Profile Centrelines and Edgelines
    • 2.4. Enhanced Pavement Markings
    • 2.5. Raised Reflective Pavement Markers
    • 2.6. Internally Illuminated Pavement Markers
  • Crash modification
  • Treatment life
  • Crash modification
  • Treatment life
  • Crash modification
  • Treatment life
  • Profiled thermoplastic centreline stripes
  • Cold applied plastic materials
  • Road marking tape
  • Crash modification
  • Treatment life
  • Crash modification
  • Treatment life
  • Crash modification
  • Treatment life
  • 3. Median Treatments
    • 3.1. Painted Median
    • 3.2. Pavement Bars
    • 3.3. Wide Centreline Treatment
    • 3.4. Raised Median
    • 3.5. Barrier Kerbing on Median
    • 3.6. Median Barriers
      • 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
    • 3.8. Median Turning Bays
    • 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
    • 3.11. Median Plantations
  • Crash modification
  • Treatment life
  • Crash modification
  • Treatment life
  • Crash modification
  • Treatment life
  • Crash modification
  • Treatment life
  • Crash modification
  • Treatment life
  • Crash modification
  • Crash modification
  • Treatment life
  • Crash modification
  • Treatment life
  • Crash modification
  • Treatment life
  • Crash modification
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  • 4. Other Road Infrastructure Solutions
    • 4.1. Speed Management
    • 4.2. Intermittent Overtaking Lanes
    • 4.3. Improved Pavement Surface
    • 4.4. Shoulder Treatments
    • 4.5. Improved Roadside Forgiveness
    • 4.6. Curve Delineation and Warning
    • 4.7. Addressing Wrong-way Movements
  • Crash modification
  • Treatment life
  • Crash modification
  • Treatment life
  • Crash modification
  • Treatment life
  • Crash modification
  • Treatment life
  • Crash modification
  • Treatment life
  • Crash modification
  • Treatment life
  • 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