 On the outer loop, as you make your way past the Georgetown Pike, headed toward the Dulles Toll Road, the work zone just starting to set up and blocking the right lane. Inner loop slows, approaching Tysons, headed toward Bethesda. On the inner loop, after the Clara Barton Parkway, headed toward River Road, that's where the left lane is blocked for the work zone there. Inner loop, as you head south of town, past St. Barnabas Road, the left lane is blocked for the work. Northbound BW Parkway toward Nassau Goddard, the single left lane gets you by the work zone there. Then further northbound, headed toward 197,