Location: Downstream Blvd and Greenwood Dr, Newton Cty As US-166 and US-400 begins, we’ll approach a roundabout. Location: Downstream Blvd and Greenwood Dr, Newton Cty Keep left to stay on 166/400 as we enter the roundabout. Location: Downstream Blvd and Greenwood Dr, Newton Cty Keep right to head out of the roundabout. Location: Downstream Blvd … Continue reading U.S. Route 400, I-44/US-166 to KS State Line