H.R. 3600 would designate the 2,400 miles of U.S. Highway 66 from Illinois to California as the Route 66 National Historic Trail. CBO estimates that enacting H.R. 3600 would not affect direct spending or revenues. CBO has not estimated the discretionary costs of implementing the bill. The bill contains no intergovernmental or private-sector mandates as defined in the Unfunded Mandates Reform Act.
