The rail line has identified 13 projects in Maryland, the District and Virginia that would clear obstructions that prevent the company from running double-stack train cars.

Some members of the board complained that CSXT, which along with Amtrak owns most of the track used by regional commuter lines, has made passenger rail service a low priority. The board voted to toughen language in its letter that sought to tie CSXT to commitments it made to the board to allocate more slots for passenger trains. A CSXT spokesman said improvements to the freight network would raise efficiency throughout the system, including passenger train service.