Japanese local government has designated expressway, national highway, highway and road which mutually linked these one and disaster prevention facilities as Emergency Tr [...]

In Japan, a lot of natural disasters are expected to occur such as typhoon, heavy snowfall, flood, sediment disaster, earthquake, tsunami and volcanic eruption. Problems [...]

In recent years extending the service life of the bridges has come to be studied. Many bridges are built in the period of high economic growth, and they reached their ser [...]