Shuttles, Class to Class travel and the level of difficulty

Hello,
My second son will be vising next week during his spring break from high school. Since he is considering Rutgers NewBrunswick I wanted to ask concerning traveling from dorm to class to class and the difficulty of it. He has some medical issues with his legs and I wondered as a Computer Science major is there a lot of shuttling or difficulty in traveling? Will there be a lot of walking required?