Improved method to calculate additional ramps explicitly (CARE2) in quantitative risk analysis for road tunnels
conference paper
Article 13 of the EU Directive on minimum safety requirements for tunnels in the Trans-European Road Network states that a risk analysis, where necessary, shall be carried out. In the Netherlands, the risk of death for road users in a tunnel is calculated with a model for quantitative risk analysis, which is called “QRA-tunnels”. QRA-tunnels is not suitable to explicitly calculate the risk in tunnels with additional ramps, exits and weave sections. The model does not foresee input for additional ramps. In [Nelisse 2012, Nelisse 2014] the method to “Calculate Additional Ramps Explicitly (CARE)” has been presented, enabling the explicit calculation of the risk in a tunnel with additional ramps. However, in this research remained an open point: the group risk with ramps is, on some points in the fN curve, lower than the group risk without ramps. This is contradictory to our expectations. In this paper it is further explored why the group risk with ramps can be lower and recommendations are given on how the current method may be improved
Topics
TNO Identifier
753499
ISBN
9781138029972
Publisher
CRC Press/Balkema
Source title
Risk, Reliability and Safety: Innovating Theory and Practice - Proceedings of the 26th European Safety and Reliability Conference, ESREL 2016
Editor(s)
Walls L.
Revie M.
Bedford T.
Revie M.
Bedford T.
Pages
1-7
Files
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