What is the highest elevation on Interstate 10?


What is the highest elevation on Interstate 10? The highest elevation along I-10 occurs just east of Tucson, 20 miles (32 km) west of Willcox, at the milemarker 320 exit for the rest stop. The westbound lanes of I-10 briefly cross above 5,000 feet (1,500 m) above sea level.


What is the longest highway in the US?

U.S. Route 20 is the ??longest road, beginning in Boston at Route 2 and runs through to an intersection with US 101 in Newport, Ore. A dozen states make up U.S. Route 20, covering 3,365 miles of road.


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