Damnation Alley

Yes, a film adaptation was released in 1977, starring Jan-Michael Vincent and George Peppard. It takes some liberties with the source material, particularly in its depiction of the mutated creatures and the overall tone.

While it shares some thematic elements with Zelazny's broader body of work, such as post-apocalyptic settings and heroic journeys, Damnation Alley is a standalone novel and not part of his more famous series like The Chronicles of Amber.