Annex 6: Road and Bridge Infrastructure Vulnerability Assessment (RBIVA) Guidelines 572 IV. A Guide to Undertaking the Infrastructure Vulnerability Audit 1. A glossary of terms and list of acronyms are provided at the forward section of these guidelines. The User is encouraged to refer to these sections as needed. The form for undertaking road audit is found in Annex A and the one for bridges is in Annex B. 2. Supporting documents and references may be secured from other agencies involved in disaster management. These may include various hazard maps from DENR, PAG-ASA, PHILVOCS, and DOST such as lfooding maps, tsunami maps, locations of active volcanoes, typhoon and fault maps, among others. These maps may be supplemented by land use maps and topographic maps from NAMRIA and local government units. Plans and reports on the design of the speciifc road section and bridge under audit will be helpful in understanding the structural characteristics of these facilities.