Abstract
We studied the possibility to diminish the damage of noise and air pollution by High Grade Road Network.
An environment evaluation system was con structed for a wide area of city. Three technical and political measures were considered: 1) the close distance of interchange from city, 2) the short distance between interchanges, and 3) the discount toll for short trip.
These measures we re analised for two purposes: the change of demand and that of the environment condition in a large area of the city.
Finally, we presented the increase of demandfor High Grade Roads considering the reduction of smog emission and noise damage inside the city.
