Locke (2013)
To be honest, I never expected that a film starring Tom Hardy on a road trip would be so good, but it really is. Hardy spends the entirety of the film driving in his car, dealing with a pregnant girlfriend, angry wife, and managing a lucrative construction project. On top of that, he also has an imaginary conversation with his deadbeat dad in the backseat.
Hardy is the only person in this film, while everyone else is a voice on the phone, and that creates such a close, yet narratively rich story, that you don’t really need anything outside of the car. It’s brilliant how well this film encapsulates how much of our world we carry with us, wherever we go.