Highway Terrain tyre usually has what is referred to as a rib designed for a reliable quiet ride and longer tread life. A rib design refers to the tread pattern being designed with symmetrical blocks for a smoother predictable ride. Many times they look like they form straight consistent pattern to allow for better straight line stability on paved roads. Highway terrain tyre that helps reduce noise or increases tire life, but it should be noted that although they are listed as highway terrain you should not be fooled by the relatively tame look. This style of tire takes into consideration the need to be ready for some off road driving and it is prepared for such a challenge. It is a general workhorse.