The full quote: > once we hit some traffic we go under 40 miles an hour we'll be able to engage it but there are some other caveats: you have to be on a highwa

The full quote: > once we hit some traffic we go under 40 miles an hour we'll be able to engage it but there are some other caveats: you have to be on a highway, the weather has to be nice, it can't be raining, it can't be freezing, and you can't change lanes; you have to stay in your lane while drive pilot is enabled So it also needs to be on the highway.