Updated , 12 : 08 p.m. | A state commission led by Richard Ravitch , a former chairman of the Metropolitan Transportation Authority , presented a wide-ranging rescue plan on Thursday for the region 's subways , buses and commuter railroads that includes a new " mobility tax " on corporate payrolls in the region ; tolls on the free East River and Harlem River bridges ; a much smaller fare and toll increase than the cash-strapped authority has threatened ; few service reductions ; and improvements in bus service .