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Delegation from Indonesia.

Roadside Hazard Management. May 31, 2012

Drivers are not always the problem

Roadside Management Strategy

Strategic Issues.

Aims: To efficiently deliver programs in three key outcome

areas of;

Safety

Environmental & Cutural Heritage Values.

Amenity and Access.

Roadside Hazard Management

Roadside Hazard Management = RHM

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

RHM Roadside The area outside the lane edgeline.

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RHM

What is Roadside Hazard Management ?

Identify, prioritise and treat

roadside hazards in order to

maximise safety by reducing the

incidence and/or severity of such

crashes.

Identify, prioritise and treat roadside hazards in order to

maximise safety by reducing the incidence and/or severity of

such crashes.

i. remove the hazard

ii. relocate the hazard

iii. alter to reduce severity

iv. protect using barriers / attenuators

1. Keep vehicles on the road

2. Provide a forgiving roadside

RHM Strategy for Roadside Hazard Management

RHM

The approach to the Management of Roadside Hazards

differs between

New road projects and existing roads.

RHM Elements of the Roadside.

Shoulders

Signs

Batters

Clear zones

RHM Shoulder width.

RHM Shoulder width.

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RHM Shoulder/Lane width

RHM Shoulder width.

RHM Shoulder width - bridges.

RHM Poles

RHM Signs-lateral clearance.

Diagram from TMV2

RHM Guideposts

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RHM Guideposts

RHM 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 Driveable Endwalls

RHM Clear zone?

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RHM Clear zone? RHM

What is a Clear Zone ?

} ?

RHM Clear zone?

RHM Clear zone?

RHM What is a Clear Zone ?

- road curvature

- embankment slope

The clear zone adopted depends on:

- vehicle speeds

- vehicle volumes

RHM Risk

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RHM Clear Zone Graph

RHM Clear zone adjustments

RHM Clear zone?

RHM Barriers

Flexible Barriers

Semi-Rigid Barriers

Rigid Barriers

RHM

Flexfence

Brifen Wire Rope Fence

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RHM Flexible barrier.

RHM Flexible Barrier

Brifen Wire Rope Safety Barrier

RHM Flexible barrier – anchorage.

RHM Flexible barrier – cross median protection.

Flexfence Wire Rope Safety Barrier

RHM Motorcycles & wire rope barriers.

RHM Non conforming barrier.

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RHM Steel beam guard fence. Terminology.

RHM Steel beam barrier. At culvert.

W Beam Safety Barrier

RHM Steel beam barrier.

RHM Guardfence Terminal

RHM Interface with bridge.

RHM Barrier –Structure Interface

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RHM Crash cushion.

RHM Crash cushions.

RHM Rigid Barrier New Jersey Barrier Single slope Tric bloc

RHM Rigid barrier

RHM Rigid Barriers.

Roadside Hazard Management. 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.

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RHM Crash Reduction Factors.

RHM Crash Reduction Factors.