I saw this last year in SF, and as anyone who's been to Rick's annual "Lost Landscapes of San Francisco" film presentations for the Long Now Foundation would be familiar with, you provide the soundtrack at his screenings, shouting out places you recognize, or riffing on whatever comic scenarios arise. He might have edited the content down (or up) considerably since then, but at that screening, anyway, a lot of the specificities concerning locale were open to guess, despite an overarching arc of travel moving from New England to California.
The most memorable segments, for me, were of Pittsburgh (attn: Beschizza), from sometime in the 30s, I think, scenery barely visible through the coal dust.
I don't imagine the audiences in the upcoming European screenings will be quite so vocal about the American byroads they recognize from their mid-20th century sojourns. I hope more places, perhaps somewhere along Route 66, invite Rick out for a screening.