text:  15 northbound slowing out of Loudoun County this morning. Your delays begin by 7 in Leesburg. They're going to stay with you over the Potomac River into Maryland. 15 northbound at Mountville Roadblock for an accident with injury. Follow police direction around the scene. In Frederick, going through Frederick City. On 15 northbound, it is stop and go. Jefferson Street to 7th Street. While southbound, you're slowing.