Emergency Refuge Areas (ERA) at frequent intervals along the hard shoulder will be equipped with emergency phones and CCTV cameras.
The area of Driftless Area National Wildlife Refuge is 3,286,006.946424576 square meters.
The area of Chychkan Wildlife Refuge is 366 square kilometers.
The area of Patuxent Research Refuge is 51.8 square kilometers.
The area of National Elk Refuge is 101.171 square kilometers.
The area of Chandalash Wildlife Refuge is 350 square kilometers.
The area of Choctaw National Wildlife Refuge is 17.07 square kilometers.
The area of Aransas National Wildlife Refuge is 464 square kilometers.
The area of Arrowwood National Wildlife Refuge is 64.483 square kilometers.
The area of Hanalei National Wildlife Refuge is 3,710,967.3393408 square meters.
The area of Felsenthal National Wildlife Refuge is 262.649 square kilometers.
The area of Modoc National Wildlife Refuge is 28.328 square kilometers.
The area of Rydell National Wildlife Refuge is 8,579,335.615488 square meters.