A tunneling method to improve the visual environment group

The present invention relates to a method for improving the visual environment tunnel group, and a length of 1km or less composed of two or more tunnels, the tunnels 60 h speed limit for the road group ~ 80km / highway, the side wall surface of the tunnel, using reflective materials, large set of rhythm curve (1) of the sinusoidal configuration, the arcuate curve constituting the small set feeling prosody curves (2) below the large rhythm curve (1), the highest point of the large rhythm curve (1) and the highest point of a small sense of rhythm curve (2) in the vertical alignment, and filled with a color between the large rhythm curve (1) and the small rhythm curve (2), to improve the visual link in the cluster driver tunnel environment, contributing to road traffic tunnel group safety and comfort.