Highway pavement with high functioning Highway pavement is being changed. When we drive highway and it rains, it does not influence us and the vehicle running in front does not generate a spray, and noise in the vehicle is lowered, and also we may comfortably drive even in rainy night as headlight is not diffusively reflected. We may see this pavement in all national highways in the near future. In this column, we focus on this pavement. Now, JH is expanding this pavement with drainage and low-noise functions[high-functioning pavement](drainage pavement) to the whole country. In high-functioning pavement, compounds having air void ratio of about 20% are used and so a water pool is hardly created. Consequently, a spray is rarely generated by traveling vehicles going ahead, hydroplaning(vehicles slide rainy road) does hardly occur, and a lane is more easily distinguished in raining. At the same time, it makes traveling conditions good in raining by reinforcing resistance to sliding of wheels. Besides, as air void absorbs noise from contact of running wheels and road surface, it lowers traffic noise and improves the living environment. Over 10,000 persons were killed in traffic accidents in 1998. Now traffic accident has become a serious social issue. The number of traffic accidents is over of opening to traffic and traffic volume, and the number of the dead from traffic accidents was sharply increased in 1988 and it was 418 in 1991. Mortality rate in raining is about 7 times higher than in clear days (data in 1995). More accidents occurs in wet condition than dry condition. More accidents occurs at quaking points, at right curve(left curve in Korea) and during detouring in wet condition.