The literature of cultural landscapes contains abundant road studies by Jackson, Clay, and others. However, the actual preservation of transportation corridors poses numerous challenges, most of which stem from their long and narrow character: although preservation of a road's structures(roadbed, curbs and culverts) may be straightforward due to their relative simplicity and the road's jurisdiction under a single agency, preservation of the corridor context is usually more difficult, due to its vast expanse, myriad stakeholders, and rapid change. Situated in larger social and environmental networks of communication and transportation and affected by rapid technology change, roads are "fast change" landscapes, their use, experience and character evolving over time. Given such changes how can preservation be accomplished—or justified—over the long distances of transportation corridors? Four case studies from the United States explicate preservation challenges at local, regional and national scales. Discussion of parkways, scenic byways, and highways describes preservation approaches that permit ongoing transformation and evolution of these resources.