Maryland will appeal the Judge's ruling delaying the Purple Line:

"Maryland Secretary of Transportation Pete Rahn says the state will appeal the ruling made Wednesday by a federal judge that vacates federal approval of the Purple Line light-rail project and requires the state to conduct another ridership study.

“We are deeply disappointed that this puts the Purple Line in jeopardy,” Rahn said in a statement. “We will work closely with the Attorney General to seek a quick decision from the court of appeals"

Read more here:

Plaintiffs Celebrate Purple Line Decision While Transit Advocates Condemn It
Maryland transportation chief says state will appeal ruling by federal judge
BETHESDAMAGAZINE.COM