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.
On a controlled-access highway, the cruising speed
reflects the speed limit, taking into consideration any
off set you've specified using Speed Assist. However, if
you choose to use Autosteer on residential roads, a road
without a center divider, or a road where access is not
limited, Autosteer