I give this movie 2.5 stars. Here is the synopsis that goes with the trailer:
"Ivan Locke has worked diligently to craft the life he has envisioned, dedicating himself to the job that he loves and the family he adores. On the eve of the biggest challenge of his career, Ivan receives a phone call that sets in motion a series of events that will unravel his family, job, and soul. All taking place over the course of one absolutely riveting car ride, LOCKE is an exploration of how one decision can lead to the complete collapse of a life."
The entire film consists of the character talking to different people on his cellphone (e.g., his son, his co-worker who is drunk, wife, 46 year old one-night stand who says she's pregnant by him and tonight is delivering "their" baby, etc.) or to the memory of the father who deserted him (so Locke looks to the empty backseat through the rearview mirror).
A man of organization and details, a man of enormous responsibility,Locke never gets a ticket nor passes a tollbooth nor exits the car for any reason. By the end of the film, you are dying for him to be pulled over or to have some kind of fender bender. Locke is heading on the highway to the hospital where his one-night stand is in labor. He tells his wife that he is "doing the right thing" to be with the woman. He tells the one-night stand that he doesn't love her but is coming to be with her. It is not interesting. This situation is implausible.
A man so organized and responsible would not have unprotected intercourse with a woman to whom he is not attracted nor emotionally involved for the reason Locke gives: "I felt sorry for her." Nor would he break up his home for that reason. We are told that he was abandoned as a baby, and to right this wrong he, Locke, is going to the hospital to see this new creature "into the world."
If anything had been made more interesting-- Locke's character perhaps or his relations with his family or with his wife or with his one-night stand--, then the car ride might have been "rivetting."
But it is tedious after an hour of it and if you've run out of popcorn, you'll go out to get more popcorn and not feel you've missed anything. I did and I didn't.