16 Blocks (2006)

Bruce Willis plays Jack Mosley, a burnt-out detective assigned the task of transporting a fast talking convict from jail to a court house 16 blocks away. However, along the way he learns that the man is supposed to testify against Mosley's colleagues, and the entire NYPD wants him dead. Mosley must choose between loyalty to his colleagues and protecting the witness. Never has such a short distance seemed so long!

Official website: http://www2.warnerbros.com/16blocks/index.html