Date: August 20th, 2026 5:04 PM
Author: AZNgirl applying 500 times to White & Case
since 1980 only added 11k highway but almost all of that was pre 2000, since 2000 only 3.8k
If you mean 11,738 km of Interstate added since 1980, as a percentage of the entire U.S. public road network in 1980:
Total public road mileage in 1980: 3,859,837 miles = ~6.212 million km
Interstate added: 11,738 km
11,738 ÷ 6,212,000 = 0.189%
So about 0.19% of the entire U.S. road network in 1980.
But if you mean as a percentage of the Interstate network that existed in 1980:
1980 Interstate network: ~66,176 km
Added since 1980: 11,738 km
= 17.7%
(http://www.autoadmit.com/thread.php?thread_id=5895331&forum_id=2...#50081145)