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. Let's say another crew is working off the shoulder of Interstate 75 in the same county of Kentucky and is closing the shoulder and using a shoulder taper. If the offset or width of the shoulder is 15 feet and the posted speed is 70 mph, what is the length of the shoulder taper? 347 feet 250 feet 500 feet 1225 feet