when i drove cross country in a u haul truck with my son a few years ago, the truck had no such control, and i one of the wild open places, they high plains of wyoming or maybe Utah, i drove the fastest i have ever driven, over 90 miles per hour... i didn't keep going that fast for long, i didn't think it safe, but we did regualary go 75 mph in the the thing. so they are not consistant in use of governers.