Well, just as on Earth, there are cases where pavement for wheeled vehicles makes sense and cases where trains on tracks makes sense. But I expect rail will be

Well, just as on Earth, there are cases where pavement for wheeled vehicles makes sense and cases where trains on tracks makes sense. But I expect rail will be more widely deployed on Mars since typical travel speeds will be higher on account of the thinner atmosphere. Going 300 mph by rail would be a snap, but you'd need awfully smooth and wide pavement, and a steady hand, to drive that fast on Mars. And going significantly faster will require levitation, where there isn't any advantage to not using a track.