ROAD NETWORK SEGMENTS AT RISK – VULNERABILITY ANALYSIS AND NATURAL HAZARDS ASSESSMENT

Abstract

Risk analysis of a road network includes evaluation of both the hazards along the
roads and the vulnerability of the road segments. We propose an approach to natural hazard
assessment related to natural phenomena which occurred in the Czech Republic. Road
vulnerability can be assessed in two ways: direct losses from damage to a road segment or
indirect losses due to additional expenses for longer alternative routes. Risk analysis is
computed for individual road segments. The risk can be reduced on both parts of the risk graph
(hazards × vulnerability). This approach of risk analysis is demonstrated on an example of
a road network within the Luhačovice region of the Czech Republic.