It would reduce the number of vehicles if they let people take a bus or train in one direction, and taxi or rideshare in the other. I used to occasionally do t

It would reduce the number of vehicles if they let people take a bus or train in one direction, and taxi or rideshare in the other. I used to occasionally do this for groceries: bus to the supermarket, taxi back to avoid carrying everything from the bus stop. I'm not sure this is actually a common pattern, though.