You're describing a great answer if we were designing the system from scratch. But, as many of us engineers know, dealing with legacy requirements can change t

You're describing a great answer if we were designing the system from scratch. But, as many of us engineers know, dealing with legacy requirements can change the clearest path to a solution. I know very few people who correctly calculate the the cost of the externalities you listed against the convenience of having a car, yet their votes count for the same amount as ours.