News I-66 closures between Rt. 234 and Rt. 29 start tonight By Potomac Local News Published July 6, 2018 at 8:27AM Drivers headed south on U.S. 29 in Gainesville now use an elevated bridge to cross train tracks. The new separated interchange is expected to stop frequent train vs. car collisions in the area. [Photo: Uriah Kiser / Potomac Local News] This article is FREE to read. Please Sign In or Create a FREE Account. Thank you. Author Potomac Local News View all posts #News