The Quantitative Assessment of Debris Flow Risk to Road Users on the Scottish Trunk Road Network

Published: Oct 2018


ISBN: 978-1-912433-56-8

Author: J C F Wong and M G Winter

Pages: 74

Reference: PPR798


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This report presents the methodology developed for undertaking a quantitative risk assessment (QRA) for the impact of debris flow on roads. It also presents a first use of  the methodology at the A83 Rest and be Thankful in Scotland. The methodology  considers the probability of an event of a typical size, and the conditional probabilities of a vehicle being affected, given an event, and of damage (fatality) occurring given that the vehicle is affected.

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