If people travel by public transport, avoiding the shut-in nature of the private car, they are free to act in a helpful way in public places.
(they; are; free to act in a helpful way in public places) (they; to act; ) (people; travel; ) Context(people travel,List([3, 16))):(people; travel avoiding; the shut-in nature of the private car)
people travel,List([3, 16))
they they people people
are to act travel travel avoiding
free to act in a helpful way in public places
the shut-in nature of the private car