Legend (transportation/transport_layers)

Interstate Highways (1) Interstate Highways Interstate Highways (2) Interstate Highways U.S. Highways (4) U.S. Highways U.S. Highways (5) U.S. Highways State Highways (7) State Highways State Highways (8) State Highways Major Roads (10) Major Roads (11) Major Roads (12) Minor Roads (14) Minor Roads (15) Minor Roads (16)