Highway pavement with high functioning Measures for traffic safety: The numbers of accidents before and after high-functioning pavement went into service have been compared in 213 places where many accidents had occurred in raining. The comparison showed that the number decreased 63% in general after drainage pavement went into operation, and especially the number of accidents in raining diminished by 85% from before operation. Also, this traffic safety effect lasted for 72 months. It means the effect has been quantitatively confirmed. Noise lowering: Noises from vehicles in traveling typically come from the contact of rotating tires with road surface, running engines and blowing horns of cars. The noise from the contact of tires and asphalt is generated by air pumping phenomenon caused by compression and expansion of air which lost a place to exit as a gap of tires and road surface becomes narrow. In case of high-functioning pavement, noise is lessened by double effects of suppression of tire sound and absorption of vehicle sound by innumerable air voids on the pavement surface. A survey on the spots paved with high-functioning asphalt shows that noise level has been lowered by about 3dB from before, and the effect has lived on even 3 years after the the start of the service of the new pavement. In addition,, as vibrating places and turning points are a sloped in some degree toward center, the drainage slope hardly functions. And a right curved(left curve in Korea) part has a place where road surface is sloped to the opposite lane due to high speed of traveling vehicles, resulting in high accident rate because of water pools. For these reasons, high-functioning pavement has been introduced to prevent traffic accidents in raining at places such as vibrating spots and truning points.. The effects have been porved by the trial operation for the past 10 years since it went into service nationwide in 1989. Initially, high-functioning pavement has been ill-managed in the snowed earth. The main problem lay in the road surface control in the winter season. The existing problems on road surface control in the winter season are low road surface temperature compared to dense pavement longer snow-coverd time compared to dense pavement lower effect of a freezing resist.Road surface temperature is a little bit higher in dense pavement than in high-functioning pavement in the daytime, but when temperature goes down(that is, during night), high-functioning pavement do not allow road surface temperature to fall as low as dense pavement. It is judged that high-functioning pavement is not easily heated or cooled due to innumerable air voids it contains. Long snow-covered time compared to dense pavement means that dense pavement is in wetter condition than high-functioning pavement. The frequency of this condition is not high. High-functioning pavement does not allows water to remain on the road. High-functioning open grade pavement is more sharply contrasted with snow and so snow is seen whiter on it than on dense pavement. For the effect of a freezing resist, the experiment of comparing residual salt concentration after freezing resist had been sprayed on both dense panvement and high-functioning pavement showed that the concentration level is higher on high-functioning pavement.