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Network Safety Management –

A French-German Co-operationKerstin LEMKE

Federal Highway Research Institute (BASt)

Pascal CHAMBONRoads and Motorways Engineering Dept.

(Sétra) François GANNEAU

Roads and Motorways Engineering Dept.(Sétra)

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French-German Elysée Treaty (1963)Co-operation in

• Politics

• Public Services

• Science

Exchange of experience on safety analysis of existing road networks

Source : Bundesbildstelle, Berlin

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National Guidelines

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Understand DIAGNOSIS ANDDIAGNOSIS ANDDEVELOPMENT OF MEASURESDEVELOPMENT OF MEASURES

ActRANKING AND RANKING AND

IMPLEMENTATION OF IMPLEMENTATION OF MEASURESMEASURES

Improving Safety of Existing Road Networks

ASSESSMENTASSESSMENTOF MEASURESOF MEASURES

Evaluate

KnowACCIDENTACCIDENTDATABASEDATABASEANALYSISANALYSIS

NSM

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Methodology Requirements

Road administrations have to determine poor road sections/itineraries where possible improvements will be highly cost-efficient.Methodology for accident analysis has to

be based on costs (Euros)

provide a ranking of sectionsfor further analysis

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Accidentswith personal injuryon German motorways2002

Accident Rate Accidents

106 veh•km

0,25 - 0,42 (n=360)

0,06 - 0,25 (n=3661)

0 - 0,06 (n=1158)

0,72 and more (n=37)

0,42 - 0,72 (n=106)

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• joint analysis of accidents of different severity • consideration of different casualty structures• basis for cost-benefit analysis

number ofaccidents accident

cost

severity

Accident Cost instead of Number

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Safety Potential

actual accident cost per km

= accident cost per kilometre that could besaved by improvement measures

= accident cost to be compared withcosts for measures (cost-benefit analysis)

-target accident cost per km

=safety potential

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Accidents with personal injury and serious damage-only accidents on German motorways 2001-2003

Safety Potential1000 Euro

km

50 - 105 (n=671)

105 - 250 (n=555)250 and more (n=187)

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Ranking of sections/itineraries

Basis for further analysis, development of measures and assessment

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Understand DIAGNOSIS ANDDIAGNOSIS ANDDEVELOPMENT OF MEASURESDEVELOPMENT OF MEASURES

ActRANKING AND RANKING AND

IMPLEMENTATION OF IMPLEMENTATION OF MEASURESMEASURES

Improving Safety of Existing Road Networks

ASSESSMENTASSESSMENTOF MEASURESOF MEASURES

Evaluate

NSMRanking ofsections/itineraries

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Network safety management

• highlights worst performing sections/itineraries• provides a priority ranking of sections/

itineraries to be further analysed and improved• permits a direct comparison: potential savings

in accident costs vs. costs of improvement measures

• focuses on longer sections/itineraries complements Black Spot Management

• coincides with EU Commission’s definition

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Where do we stand now?

Germany:• Safety potential map for motorways (since 2003)• Pilot for all interurban roads in one state (2006)

France:• Method applied at national level (2005)• Feedback on trials• 16 M€ available for 2006

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References

• “Network Safety Management (NSM)” http://www.sure.equipement.gouv.fr/IMG/pdf/NSM_V_FD_final_cle55ec71-1.pdf

• „Guidelines for Safety Analysis of Road Networks (ESN)“, FGSV, Germany 2003. http:// www.bast.de

• “User Safety on the Existing Road Network (USER)”, http://www.sure.equipement.gouv.fr