541215-98 100 miles you take at least that many chances of dropping to oblivione The roads are in the most rugged mountains and are carved out of solid rock. The thing that characterizes these highways are the abrupt drops- up to 2,000 feet oe Peet If there are no mountains you often travel roads built in sides of highly eroded canyons-thus: c All this country is of volcanic sediment in nature and the canyons are deep, atraight wall- ed and narrow. You trevel for miles in low gear -going up and goitly down.