People in congested cities don't not ride bikes because they are too expensive. You can get a second hand one on craigslist for not much more than $20. It's be

People in congested cities don't not ride bikes because they are too expensive. You can get a second hand one on craigslist for not much more than $20. It's because: 1) They're lazy and don't like pedalling up hills 2) They're worried they'll get killed by a car 3) They're worried they'll get a puncture and be late or have their pants ripped on the chainring. 4) They have stuff to carry around and don't want to mess with a trailer.