(abbreviated '''I-180''') is a spur off
Interstate 80 into downtown
Cheyenne ,
Wyoming .
It is unusual for being the only
Interstate Highway that is not up to
Interstate Highway Standards (and not even a
Freeway ) anywhere on its route. The only grade separations being a standard
Diamond Interchange at its southern end at I-80, and a bridge over the
Union Pacific Railroad tracks. It is a
Divided at-grade
Expressway with a 40 mph (60 km/h)
Speed Limit due to the frequency of signals. There are five
Traffic Signal s along I-180. This is nowhere near Interstate standards, but it received
Federal Funding under the Interstate Highway program.
Map Aerial photo
''Photos showing road signs and traffic lights on I-180'':
from [http://www.interstate-guide.com/i-180_wy.html ,
and [http://www.rockymountainroads.com/wyoming100/i-180_sb_exit_000d_06.jpg from [http://www.rockymountainroads.com/i-180_wy.html].
