Abstract
This paper describes inspection of facility effects, which were established to secure comfortableness of the driving environment. A subject of the discussion was a provisional two-lane highway that passed through mountain areas. The research adopted was the analyses of questionnaires and statistics. The facilities of Kochi-highway were evaluated using three methods in order to improve the driving environment. The methods were using the questionnaires to be answered by real drivers, users of parking areas; and the users after observing photos and videos, which showed cars running on the highway. Results clearly showed the direction and problems of measures to secure the comfortableness of the driving environment on the highways of the mountain areas.
