NEW YORK — New York is on track to become the first U.S. city with congestion tolls on drivers entering its central business district after transit officials approved a $15 fee for most motorists headed into part of Manhattan.Members of the Metropolitan Transportation Authority board on Wednesday voted to greenlight the congestion pricing plan, expected to go into effect in June. The board approved only minor changes to a plan presented to the public months ago, and brushed off requests for exceptions by dozens of …