A quantitative risk analysis based on the impact of hourly traffic volume (VHP) and percentage of heavy goods vehicles (HGVs) in a bi-directional road tunnel was carried out both for normal and temporary traffic regimes. The results in term of social risk, as F/N curves, show that the risk level for combinations of VHP and percentage of HGVs can be beyond the threshold of intolerable risk. As a result, safety measures in order to reduce the risk level must be taken. In this respect, the Tunnel Management Agency (TMA) can permit, for normal traffic conditions, that HGVs pass through the tunnel only during night or along an alternative route runs completely in open air. Also in the event of a temporary lane closure for maintenance needs, the risk level can be beyond the safety limit. Risk charts are proposed for assisting the TMA in making decisions on traffic control strategies.

Quantitative Risk Analyisis based on the Impact of Traffic Flow in a Road Tunnel

CALIENDO, Ciro;DE GUGLIELMO, MARIA LUISA
2016-01-01

Abstract

A quantitative risk analysis based on the impact of hourly traffic volume (VHP) and percentage of heavy goods vehicles (HGVs) in a bi-directional road tunnel was carried out both for normal and temporary traffic regimes. The results in term of social risk, as F/N curves, show that the risk level for combinations of VHP and percentage of HGVs can be beyond the threshold of intolerable risk. As a result, safety measures in order to reduce the risk level must be taken. In this respect, the Tunnel Management Agency (TMA) can permit, for normal traffic conditions, that HGVs pass through the tunnel only during night or along an alternative route runs completely in open air. Also in the event of a temporary lane closure for maintenance needs, the risk level can be beyond the safety limit. Risk charts are proposed for assisting the TMA in making decisions on traffic control strategies.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11386/4660041
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