warner van hattem (the netherlands) 1 december 2005 roadside safety aspects in rsa's the dutch...
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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
1 december 2005
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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Road Side Safety Aspects in RSA's 5
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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Road Side Safety Aspects in RSA's 6
Preparatory Tasks of Design
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Road Side Safety Aspects in RSA's 7
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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Road Side Safety Aspects in RSA's 8
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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Road Side Safety Aspects in RSA's 9
Preliminary Design (2)
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Road Side Safety Aspects in RSA's 10
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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Road Side Safety Aspects in RSA's 11
Preliminary Design (3)
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Road Side Safety Aspects in RSA's 12
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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Road Side Safety Aspects in RSA's 13
Final Design, Tender Document (1)
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Road Side Safety Aspects in RSA's 14
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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Road Side Safety Aspects in RSA's 15
Final Design, Tender Document (3)
P3
• Application of the correct VRS– ASI-value– Availability of space
Minimise injuries
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Road Side Safety Aspects in RSA's 16
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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Road Side Safety Aspects in RSA's 17
Before Opening of the Road
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Road Side Safety Aspects in RSA's 18
After Opening of the Road
• Maintenance program ‘PRIOBERM’– Priorities– Costs
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Road Side Safety Aspects in RSA's 19
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