Here are discussed on the mixture that shows light coloring effect. In order to attain light coloring effect, white colored aggregates (natural aggregates and artificial aggregates are there), decolorized binders (high viscosity modified type is also available), white pigment are used by single or combination of those. Hereunder are introduced typical examples that we WatanabeSato constructed.

Kind	Features	Example
The method of mixing white colored aggregates into ordinary hot mix asphalt mixtures.	economical It takes time until the light coloring effect appear (until the coated asphalt on aggregates surface are removed)	Tokyo-Nagoya Expressway at Yamato tunnel
The method of using white colored aggregates as the sprayed chips on hot rolled asphalt pavements.	Economical The construction is rather difficult because the sprayed chips will be stripped if the plunging of those is insufficient.	Tokyo-Nagoya Expressway Uri tunnel
Semi-flexible pavement	The effect of light coloring is large though expensive. comparatively excellent at raveling resistance.	Michinoku Toll road Higashi-Tenma tunnel
The method of mixing white ceramic aggregate and white pigment in hot mix mixture using de-colorized binder.	The effect of brightness is large though the price of mixture is a little higher. Applied for tunnels with heavy vehicle traffic of less than 3,000 a day.	National Highway 108 city of Ohfunado Shiraishi tunnel
The method of mixing white ceramic aggregate and white pigment in hot mix mixture using a combined binder of de-colorized binder and epoxy-resin.	The effect of brightness is large. Besides abrasion resistance is excellent. The cost is higher but the durability compensate it decreasing traffic closure for repairing. Applied for tunnels with heavy vehicle traffic of more than 3,000 a day.	National highway 13 Ohtaki No.1 tunnel Higashi-Kuriko tunnel

    As for pavements in tunnels, the suitable kind of pavement varies depending on climate, traffic condition, environments for construction.