Roadsides free from disturbances occurring on adjacent lands can be managed as refuges for the preservation of threatened or endangered plants and sensitive ecosystems. TxDOT and the Texas Parks and Wildlife Department (TPWD) have interagency agreements to identify sensitive plants and develop appropriate management plans. Roadsides can also be managed to enhance habitat for threatened or endangered wildlife. Such roadsides would be particularly valuable in regions where existing potential habitat is scarce.