U.S. Route 40 was originally routed on the old railroad grade through the canyon, however a third and fourth bore were finished by the time US-40 was upgraded to Interstate Highway standards and replaced by Interstate 80.
U.S. Route 40 was originally routed on the old railroad grade through the canyon. A third and fourth bore were finished by the time US.40 was upgraded to Interstate Highway standards.40 was replaced by Interstate 80.