The PIARC Working Group G2 was set up in 1990, in response to the United Nations proposal on the International Decade for Natural Disaster Reduction (IDNDR). For the first period (1990-1995), the Working Group had conducted various studies including an international survey on road disasters, and published "Comprehensive Report on Natural Disaster Reduction for Roads, " for distribution at the 20th World Road Congress in Montreal in 1995. The survey done by G2 indicates that landslide, earthquake, flood, and snow avalanche are the four major natural hazards to roads. Other hazards include volcanic eruption, tsunami, storm surge, strong wind, wild forest fire, and sand accumulation.

This report presents the results of the second period (1996-1999). It has been realized by 28 PIARC members who represent 22 countries faced with natural disasters.