8         ARIZONA HIGHWAY 78

            (between Threeway, AZ and Mule Creek, NM)

            This road is posted—"Curves—mountain grades—trucks not recommended."

            Highway 78 is a narrow, winding road with 15 mph hairpin turns and many 20 to 30 mph curves.  The summit of the hill is about milepost 168½ (about 5½ miles west of the state line.)  The westbound descent starts with about 4 miles of steady 7-8% grade with 25 mph curves.  After that it's a roller coaster descent for about 7 miles with grades that vary from 4-7% and almost constant 25 mph curves.  The eastbound descent rolls up and down with short 5 and 6% grades and numerous 20 and 25 mph curves.