If you’ve ever spent any extended time in a coffee shop or a freshman dorm, chances are you’ve seen a good number of young people with open hearts and confused eyes dutifully thumbing through the pages of Jack Kerouac’s “On the Road.” It’s one of those books you just have to get into when you’re coming of age, like “The Catcher in the Rye,” or, if you’re a sociopath, Ayn Rand’s stuff. Given the book’s enduring popularity, it’s strange that it’s taken so long for Hollywood to make a big screen adaptation, but, nevertheless, the wait is over, and the first trailer for the film is here. How does it look? Well, it looks like director Walter Salles (The Motorcycle Diaries) and his camera crew have shot a beautiful film. And seeing as the narration put over this trailer quotes one of the most famous passages from Kerouac’s novel, it looks like he’s made a film that’s very much On the Road. This seems to be a straight adaptation; the essence of the book put up on the screen, without any unexpected detours.