When you say paving, are you referring to asphalt pavement or concrete? If you want the two strips to drive down and a grass strip in the middle to mow, concrete would work for that. If you want to go with asphalt in two strips, it will fail pretty quickly. the edges of asphalt are it's weakest link. Doubling the amount of edge will more then double your odds of failure.
Most important thing is going to be a solid base. Then it's important to put it thick enough to hold up to traffic. Go too thin and have one heavy truck drive over it on a hot day, and it's ruined.