News Dumfries, Haymarket urge transit rail studies By Potomac Local News Published August 24, 2015 at 12:00PM Metro's “Rush Plus” service allows riders on Blue line trains from the Franconia-Springfield station the option of boarding a train that will take them across the Yellow line bridge crossing the Potomac River. This article is FREE to read. Please Sign In or Create a FREE Account. Thank you. Author Potomac Local News View all posts #News