Trivia: The famous "Dukes of Hazzard" sequence was the filmmakers' wry commentary on the uncompleted state of Interstate 105, which had become a running joke among LA motorists. It was finally (and quite uncoincidentally) completed in late 1993 shortly before the film's release, years behind schedule.
Trivia: When the bus crashes into the plane at the end, the company logo on the plane is "Pacific Courier." This fictional company name also appears in "Die Hard"--it's on the truck the terrorists show up in (except Karl and Theo, who arrive by car). Jan de Bont, who directed "Speed," was DP on "Die Hard."
Question: How would you get on the roof of a moving subway? We don't see it in the movie (Jack looks up and starts to climb - cut - Jack is on the roof.... Howard cries 'I'm coming for you Jack and runs - cut - Howard is behind Jack on the roof. after the fight when Howard 'lost his head' - cut - Jack is inside the subway again...).