The Washington region’s airports board on Wednesday advanced plans to increase tolls on the Dulles Toll Road to help pay for the construction of the $6 billion Silver Line.

Metropolitan Washington Airports Authority board members are considering raising tolls from the current $2.25 to $2.75 in 2013, $3.50 in 2014 and $4.50 in 2015. The board will make a final decision on the scheduled toll increases in November. They would take effect Jan. 1.