And are sometimes annoying.
I just drove my family from California to Utah to spend some time out here for a family reunion.
Most drivers get it, but I would say at least 10% of drivers don’t use cruise control and their speed fluctuates up and down. it’s particularly annoying on two lane stretches of I 15 when you are either trying to pass them or when they are trying to pass you and their speed fluctuates up and down. I mostly just don’t understand how everybody doesn’t use Cruise control. It makes long drives SO much easier. My knee and ankle gets tired after about 20 minutes without it.