If you’ve never seen the 1971 film “Two Lane Blacktop,” now’s your chance. Someone has posted the entire movie on YouTube.
https://youtu.be/INDEPvrKIv0
According to a Wikipedia article about the film:
Two-Lane Blacktop is notable as a time capsule film of U.S. Route 66 during the pre-Interstate Highway era, and for its stark footage and minimal dialogue. As such, it has become popular with fans of Route 66. Two-Lane Blacktop has been compared to similar road movies with an existentialist message from the era, such as Vanishing Point, Easy Rider, and Electra Glide in Blue.
I’ve spotted several Route 66 landmarks in New Mexico and Texas in the film.