Portal:U.S. roads/Did you know/September 2015

I-180/US 85/I-25 BUS at its northern terminus at US 30/I-80 BUS in Cheyenne

...that Interstate 180 (pictured) in Cheyenne, Wyoming is a surface highway for its entire length?
...that the Indiana State Road System has a mileage cap of 12,000 miles (19,000 km)?
...that during the construction of Interstate 279 in Pittsburgh, Pennsylvania in 1987, a 19th-century cemetery was discovered?
...that in 2013 North Carolina Highway 45 was extended from Swan Quarter to North Carolina Highway 12 in Ocracoke via the Swan Quarter-Ocracoke Ferry across the Pamlico Sound?
... that a portion of the Rhode Island Route 37 expressway was inadvertently constructed over a historic cemetery in Cranston, Rhode Island?