Abstract
Benzene is a carcinogen and a chemistry substance with many amounts of emission. The main sources are considered to be auto mobile exhaust gases. Therefore, it is thought that the benzene concentration near the road is high and its amount of exposure of the residents who live there is also large. Then, by the tank experiment and numerical simulation with considering building structure near national road No.43 at Ashiya City, benzene concentration around the roadside was presumed, and the number of cancers patients by benzene was computed.
