I always had this idea for a highway conversion that makes it into a sort of a railway for individual cars. SO imagine you drive on your local streets until yo

I always had this idea for a highway conversion that makes it into a sort of a railway for individual cars. SO imagine you drive on your local streets until you get to this "highway". Then via some mechanism (something like the drive-through car wash but more heavy duty obviously), you merge onto the highway and get pulled by electric motors (perhaps even motors within your own car) along with all the other cars. You can then relax in your car, read, nap or watch videos until you are taken out at your exit ramp. No pollution, no grid-lock, no accidents. Just a smooth ride all the way to within 2-5km from your destination.