As it no longer met the needs of the commuter, large numbers defected to using their cars. As maintenance improved, customers returned. Time is the most critical factor in the commuter's decision process. The longer the commuting distance, the greater the opportunity to greatly reduce travel time. Dependability is essential to customer satisfaction.
People dislike waiting at a transit stop.
Actually, it is the uncertainty as to when, or if, their transportation will arrive, rather than the waiting, that is the problem. In Europe, one can set their watch by the train schedule. Our trains, busses or trolleys are not so punctual or dependable. Technology now makes this possible. Convenience is also an important factor in gaining passenger acceptance.