In our plan we are going to shift northbound and southbound lanes of US 25 around our activity area using the portion of the road that access Boone Gap. We will create a stop sign intersection at the intersections with US 25 for Boone Gap local traffic. Let's practice taper design. If you were planning a downstream taper on a highway with a normal speed limit of 70 or a workzone speed limit of 55, what would be the spacing between channelizers? 25 feet 20 feet 15 feet 10 feet