Buoyant performances by Garrett Hedlund and Sam Riley and impeccable period details in production design lift Walter Salles’ otherwise mixed bag of a coming of age travelogue On the Road (B-). Based on Jack Karouac’s classic novel about nonconformity, the film traces episodic encounters between friends and lovers, capturing the delirium that bonds young people in their quest for identity and escape. Hedlund is pretty magnetic in a role once earmarked for Brando. It’s a pretty intense mess but watchable. Good supporting cameos by Amy Adams and Steve Buscemi, and even (gulp) Kristen Stewart and Kirsten Dunst are good.