A federal appeals court ruling has cleared the path for Maryland to move ahead with a light rail project.

Maryland Attorney General Brian Frosh said Wednesday his office is pleased by the decision, which enables work to proceed on the Purple Line. Frosh's office filed a petition with the U.S. Court of Appeals for the D.C. Circuit to get the project moving again.

RELATED: New Purple Line design called 'Trump Wall'

The court decision reinstates environmental approval for the light rail line, while another court battle continues over a 2014 federal lawsuit that aims to block the project, a 16-mile line connecting Montgomery and Prince George's counties in the suburbs of traffic-choked Washington.

The state can move ahead with trying to get $900 million in federal grants while it appeals an unfavorable ruling in the lawsuit.