Milton Keynes was designed with a tram system in mind. The major roads have wide central reservations to accommodste the tracks, and the terminus was intended to be under the road junction outside Burger King. These areas still exist and haven't been used, although the newer parts of the town don't have them so fitting them there would be troublesome.
It never happened. The money wasn't there, and the road network was so good for the time that the need wasn't pressing.
Half a century on and suddenly things may change. The roads are becoming gridlocked, air pollution is a real concern, and climate change looks set to kill us all by lunchtime. Serious talk of a tram system is suddenly back on the agenda.
They do, or course, have the infamous redways. In some ways they are infuriating, and other parts they are delightful, but the bottom line is that you can get from anywhere to anywhere without using a road for more than the few dozen yards it takes a rider to get to the nearest one.