Bringing a safe, quiet ride to highways

摘要

Safety has always been the primary goal of transportation authorities since the development of highspeed, limited-access highways, but in recent years another priority has gained increasing attention. Often referred to as 'environmental rloise', the busy din of highways can be heard in cities around the world. In the past this was a dilemma, since many of the more aggressive concrete surfaces that provided the best traction and safe driving also brought the unintended consequence of increased tyre-pavement noise. Times have changed. The innovative NGCS surface was used in the USA on an urban highway in Duluth, Minnesota, and the response was overwhelming. "Residents have called in asking how the roads became so quiet and it has even made the front page in the local newspapers," says Dan Frentress, consultant for the International Grooving and Grinding Association (IGGA).