 Weather concern is... At the National Mall and Memorial Park's headquarters, Scott Gellman, WTOP News. WTOP's traffic and weather on the 8th. Let's go to Dave Dildine in the WTOP Traffic Center. Volume delays on the Capitol Beltway. 270 northbound. A couple of slow spots near Gaithersburg, Clarksburg. Between Montgomery Village and Ketlands, police and fire rescue working a crash down below 270. It blocks part of 124 Montgomery Village Avenue, which is also Quince Orchard Road, just north of the rail bridge.