Hence, the road trip, a journey across America of 2055 in a magical car.
Johnnys own mystical experience will involve gaining understanding of the magic of roads, the domain of Hermes and (if I recall correctly) Maître Carrefour. This means psychopomps and tricksters. Roads provide a fundamental interconnectedness to a civilization, stretching across boundaries of nation and culture. Mystically the paths are themselves a place. Check out Strange Highways for Feng Shui.
The Arkansas Travelers Roadside Attractions has some interesting spots, including a monster index. There are plenty of tourist traps in Minnesota. Long Island has the Big Duck, Wisconsin has the Giant Cow, New Jersey Lucy the Margate Elephant (also here, here, and here) and Carhenge (in Nebraska) is a must check out this and this! Naturally, diners and road food will be a prominent part of the trip. Roadside oddities and roadside art can provide a great deal of flavor for the minicampaign. There are plenty in Canada, too. Motels will be a major part of the experience.