The following information relates to the tire grading system developed by the
National Highway Traffic Safety
Administration (NHTSA), which grades tires by tread wear, traction and
temperature performance. Tires that have
deep tread, and winter tires, are exempt from these marking requirements.
Roll the right scroll wheel up to increase, or down to
decrease, the set speed. Slowly rolling the scroll wheel
changes the set speed in 1 mph (1 km/h) increments and
quickly rolling the scroll wheel changes the set speed to
the closest 5 mph (5 km/h) increment.
With Traffic-Aware Cruise Contr