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2/06/2012




Delegation from   Indonesia.                                          Drivers are not always the problem
Roadside Hazard Management.
May 31, 2012




Roadside Management Strategy
Strategic Issues.

Aims:      To efficiently deliver programs in three key outcome
           areas of;

      Safety
               Roadside Hazard Management
      Environmental & Cutural Heritage Values.

      Amenity and Access.




Roadside Hazard Management                    = RHM               RHM
                                                                  Roadside
                                                                  The area outside the lane edgeline.
What is a Roadside Hazard ?
  Any object or feature on or near the
  roadway which is likely to create a
  danger to the occupants of any
  vehicle leaving the roadway




                                                                                                                  1
2/06/2012




RHM                                                            RHM
                                                               Strategy for Roadside Hazard Management
What is Roadside Hazard Management ?
                                                                1. Keep vehicles on the road
                                                                2. Provide a forgiving roadside
Identify, prioritise and treat roadside hazards in order to
       Identify, prioritise and treat                              i.    remove the hazard
      roadside hazards in order to
maximise safety by reducing the incidence and/or severity of       ii.   relocate the hazard
such crashes.                                                      iii. alter to reduce severity
   maximise safety by reducing the                                 iv. protect using barriers / attenuators
  incidence and/or severity of such
                      crashes.




RHM                                                              RHM
  The approach to the Management of Roadside Hazards             Elements of the Roadside.
                     differs between
                                                                  Shoulders

                                                                  Signs
    New road projects           and          existing roads.
                                                                  Batters

                                                                  Clear zones




RHM                                                              RHM
Shoulder width.                                                  Shoulder width.




                                                                                                                     2
2/06/2012




RHM                         RHM
Shoulder/Lane width         Shoulder width.




RHM                         RHM
Shoulder width - bridges.   Poles




RHM                         RHM
Signs-lateral clearance.    Guideposts
 Diagram from TMV2




                                                     3
2/06/2012




RHM                   RHM
Guideposts            Batters
                       Uphill batters.(cuttings).




RHM
Batters              RHM
                     What is a Clear Zone ?

                      A driveable roadside area that should be kept clear of hazardous

                      objects in order to minimise the danger of a collision should a vehicle

                      leave the road.




RHM                   RHM
Driveable Endwalls    Clear zone?




                                                                                                  4
2/06/2012




 RHM
 Clear zone?                         RHM
                                     What is a Clear Zone ?




                                                              }?



 RHM                                  RHM
 Clear zone?                          Clear zone?




                                      RHM
RHM                                   Risk
What is a Clear Zone ?

The clear zone adopted depends on:
    - vehicle speeds

    - vehicle volumes

    - road curvature
    - embankment slope




                                                                      5
2/06/2012




RHM                    RHM
Clear Zone Graph       Clear zone adjustments




RHM                RHM
                   Barriers
Clear zone?
                   
                       Flexible Barriers

                       Semi-Rigid Barriers

                       Rigid Barriers




RHM
                       Brifen Wire Rope Fence
Flexfence




                                                       6
2/06/2012




RHM                                     RHM
Flexible barrier.                       Flexible Barrier




                                     Brifen Wire Rope Safety Barrier




RHM                                 RHM
Flexible barrier – anchorage.       Flexible barrier – cross median protection.




                                     Flexfence Wire Rope Safety Barrier




RHM                                     RHM
Motorcycles & wire rope barriers.       Non conforming barrier.




                                                                                    7
2/06/2012




RHM                       RHM
Steel beam guard fence.   Steel beam barrier.
                          At culvert.
Terminology.




                                W Beam Safety Barrier




RHM                       RHM
Steel beam barrier.       Guardfence Terminal




RHM                       RHM
Interface with bridge.    Barrier –Structure Interface




                                                                8
2/06/2012




  RHM                                              RHM
  Crash cushion.                                   Crash cushions.




                                                   RHM
                                                   Rigid barrier
RHM
Rigid Barrier
New Jersey Barrier   Single slope   Tric bloc




  RHM                                           Roadside Hazard Management.
  Rigid Barriers.
                                                New Roads
                                                Possible to include treatments in design.

                                                Effect on total project cost minimised.

                                                Existing Roads
                                                Implementation of all measures impractical.

                                                Cost to implement all measures.

                                                Best use of available money?

                                                Need a method to identify sites or areas.

                                                Need a method of prioritisation.




                                                                                                     9
2/06/2012




RHM                        RHM
Crash Reduction Factors.   Crash Reduction Factors.




                                                            10

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Roadside hazard management john coles

  • 1. 2/06/2012 Delegation from Indonesia. Drivers are not always the problem Roadside Hazard Management. May 31, 2012 Roadside Management Strategy Strategic Issues. Aims: To efficiently deliver programs in three key outcome areas of; Safety Roadside Hazard Management Environmental & Cutural Heritage Values. Amenity and Access. Roadside Hazard Management = RHM RHM Roadside The area outside the lane edgeline. What is a Roadside Hazard ? Any object or feature on or near the roadway which is likely to create a danger to the occupants of any vehicle leaving the roadway 1
  • 2. 2/06/2012 RHM RHM Strategy for Roadside Hazard Management What is Roadside Hazard Management ? 1. Keep vehicles on the road 2. Provide a forgiving roadside Identify, prioritise and treat roadside hazards in order to Identify, prioritise and treat i. remove the hazard roadside hazards in order to maximise safety by reducing the incidence and/or severity of ii. relocate the hazard such crashes. iii. alter to reduce severity maximise safety by reducing the iv. protect using barriers / attenuators incidence and/or severity of such crashes. RHM RHM The approach to the Management of Roadside Hazards Elements of the Roadside. differs between  Shoulders  Signs New road projects and existing roads.  Batters  Clear zones RHM RHM Shoulder width. Shoulder width. 2
  • 3. 2/06/2012 RHM RHM Shoulder/Lane width Shoulder width. RHM RHM Shoulder width - bridges. Poles RHM RHM Signs-lateral clearance. Guideposts  Diagram from TMV2 3
  • 4. 2/06/2012 RHM RHM Guideposts Batters  Uphill batters.(cuttings). RHM Batters RHM What is a Clear Zone ? A driveable roadside area that should be kept clear of hazardous objects in order to minimise the danger of a collision should a vehicle leave the road. RHM RHM Driveable Endwalls Clear zone? 4
  • 5. 2/06/2012 RHM Clear zone? RHM What is a Clear Zone ? }? RHM RHM Clear zone? Clear zone? RHM RHM Risk What is a Clear Zone ? The clear zone adopted depends on: - vehicle speeds - vehicle volumes - road curvature - embankment slope 5
  • 6. 2/06/2012 RHM RHM Clear Zone Graph Clear zone adjustments RHM RHM Barriers Clear zone?  Flexible Barriers Semi-Rigid Barriers Rigid Barriers RHM Brifen Wire Rope Fence Flexfence 6
  • 7. 2/06/2012 RHM RHM Flexible barrier. Flexible Barrier Brifen Wire Rope Safety Barrier RHM RHM Flexible barrier – anchorage. Flexible barrier – cross median protection. Flexfence Wire Rope Safety Barrier RHM RHM Motorcycles & wire rope barriers. Non conforming barrier. 7
  • 8. 2/06/2012 RHM RHM Steel beam guard fence. Steel beam barrier. At culvert. Terminology. W Beam Safety Barrier RHM RHM Steel beam barrier. Guardfence Terminal RHM RHM Interface with bridge. Barrier –Structure Interface 8
  • 9. 2/06/2012 RHM RHM Crash cushion. Crash cushions. RHM Rigid barrier RHM Rigid Barrier New Jersey Barrier Single slope Tric bloc RHM Roadside Hazard Management. Rigid Barriers. New Roads Possible to include treatments in design. Effect on total project cost minimised. Existing Roads Implementation of all measures impractical. Cost to implement all measures. Best use of available money? Need a method to identify sites or areas. Need a method of prioritisation. 9
  • 10. 2/06/2012 RHM RHM Crash Reduction Factors. Crash Reduction Factors. 10