Around 48% of New Yorkers own cars, yet fewer than 30% use them to commute to work, most finding public transportation cheaper and more convenient for that purpose, due in large part to traffic congestion which also slows buses. To ease traffic, the Mayor, Michael R. Bloomberg, in 2007 proposed congestion pricing for motor vehicles entering Manhattan's business district from 6:00 a.m. to 6:00 p.m. However, this proposal was defeated when Sheldon Silver, Speaker of the New York State Assembly, announced that the bill would not come up for a vote in his chamber.