In my opinion, a democratic way to make such changes would be:
1) make a dedicated lane for public transport on every street so that traffic jams do not affect it
2) let car owners vote if they want to pay for entering the city or would rather spend some more time in traffic jams but save the money
surely you see the problem with only letting the car owners vote, right? right??
The traffic has a negative effect on more than just car owners--smog, noise, accidents, slower taxis, to name a few. Why should only car owners, who are a minority in Manhattan, vote on a problem that affects everyone?