While this road is a continuous stretch, it crosses about 15 signalized intersections between the intersection of US 29, US 50, and VA 236, and the interchange of VA 28 and US 29 and has a speed limit of 45 mph, making it faster and smoother to bypass the stretch by briefly following US 50 up to I 66 and following it for a few miles down to Centreville. I think in some circumstances like rush hour, US 29 might be just as fast (if not faster) than I 66, but it is for most of the time the slower route.