Vulnerability Assessment of Alternate Traffic Routes to Flooding in Metro Manila, Philippines

抄録

Alternate traffic routes are crucial in road networks because car users are given opportunities to avoid congested roads. Meanwhile, the outcome of natural disasters can make road networks vulnerable because it can decrease the entire network’s performance. This paper assessed the vulnerability of alternate traffic routes in Metro Manila to flooding. The Mabuhay Lanes (ML), designed to redirect traffic from busy roads in Metro Manila, were assessed in terms of robustness and serviceability. The assessment noted three Mabuhay Lanes as the most vulnerable in coping with the impacts of flooding affecting the entire network. Compared to the base condition, these routes had a 23 to 32% increase in link costs and traffic volume. In terms of network serviceability, ML2 is the most vulnerable because it has the most links along the route (60%) that are affected by flood waters.