There is the short story "The Roads Must Roll" by Robert Heinlein which -- as a plot device or similar -- has these vast roads which enable such things as mobile restaurants. Some characters commute over a business dinner, for example.

We can see the beginnings of this for those of us who ride transit. Reading, "sleeping", A/V media on tablets/phones... and then to make-up and phone calls... anything reasonable and semi-reasonable in public that's not active driving [and non-reasonable for some of the fringes].