Warner van Hattem (The Netherlands)

1 december 2005

Roadside Safety Aspects in RSA'sThe Dutch Approach

Ministry of Transport, Public Works and Water ManagementRoad Design Departement

Workshop RISER, Budapest

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Road Side Safety Aspects in RSA's 2

Contents

• RSA in the Netherlands

• Conclusion

• Project Stages and Road Side Safety

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Road Side Safety Aspects in RSA's 3

RSA in the Netherlands

• Starts in 2002

• Training auditors

• Pilots and evaluation

• Voluntary approach

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Road Side Safety Aspects in RSA's 4

Project Stages

1 Preparatory tasks of design2 Preliminary design3 Final design (tender document)4 Before opening of the road5 After opening of the road

•RSA in the Netherlands

•Project stages

•ConclusionDesign Principles:

P1Prevent road users to leave the carriageway

P2Minimise the risk to strike an obstacle

P3Minimise the severity of the injuries

the EARLIER, the BETTER

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Preparatory Tasks of Design

P1• Reserve sufficient space to enable an

optimal road design

Prevent leaving carriageway

P2 Minimise risks

P3 Minimise injuries

• Reserve sufficient space to enable an optimal obstacle-free zone

• Define requirements for VRSASI < 1,0

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Preparatory Tasks of Design

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Preliminary Design (1)

P1• Prevent sharp curves

Prevent leaving carriageway

• Optimal cross section– Lane width– Hard shoulder– Recovery area

• Optimal superelevation

• Ensure sight distance

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Preliminary Design (2)

P2• Soft shoulder/ central reserve

considering obstacle-free zones– Determine road axis– Determine distance between carriageways

Minimise risks

• Low gradient side slopes

• Remove or replace obstacles

• Combine obstacles– Traffic signs with fly-overs– Cameras with lighting

• Minimise objects in behalf of motorcyclists

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Preliminary Design (2)

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Preliminary Design (3)

P3

• Soft shoulder/ central reserveconsidering VRS’s

– Soil rampart– Flexible VRS– Rigid VRS

Minimise injuries• Application of passively safe poles

• Application of passively safe noise barriers• Additional construction width considering a noise barrier

• Use service roads and secondary road network for vulnerable road users

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Preliminary Design (3)

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Final Design, Tender Document (1)

P1

• Wide recovery area (not too wide to avoid unwanted behaviour)

Prevent leaving carriageway

• Acoustic road markings

• Rumble strips in recovery area

• Visual guidance by passively safe devices

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Final Design, Tender Document (1)

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Final Design, Tender Document (2)

P2

• Matted shoulder– Roughness– Green appearance

Minimise risks

• Combine obstacles

• Lighting poles (although passively safe) in inside curve of connecting roads

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Final Design, Tender Document (3)

P3

• Application of the correct VRS– ASI-value– Availability of space

Minimise injuries

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Before Opening of the RoadP1

• Roughness and contrast of pavement• Roughness of road marking in behalf of motorcyclists

Prevent leaving carriageway

P2 Minimise risks

P3 Minimise injuries

• Level out altitude differences between hard and soft shoulder

• Level out soft shoulder to prevent roll-overs

• Obstacles– Passively safe– Possibilities to combine

• Application of the correct VRS• Correct installation of the VRS

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Before Opening of the Road

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After Opening of the Road

• Maintenance program ‘PRIOBERM’– Priorities– Costs

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Conclusion

1 Preparatory tasks of design2 Preliminary design3 Final design (tender document)4 Before opening of the road5 After opening of the road

•RSA in the Netherlands

•Project stages

•Conclusion

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Road Side Safety Aspects in RSA's 20

Conclusion

• Application of RSA in the Netherlands is increasing– Special attention to Roadside Safety

Warner van HattemMinistry of Transport , Public Works and Water Management

Lecture by:

• RSA in every stage of the project– Roadside safety involves every stage

• The three design principles

P1 Prevent leaving carriageway

Minimise risks

Minimise injuries

In this specific order

P3

P2