Yost told Script Apart, "Dodger Stadium has this big road all the way around the stadium through all the parking lots. I thought that's perfect, and that was scripted until the people who owned the Dodgers and the stadium and the parking lot at the time said, 'No, we’re not going to have a terrorist film shot at Dodger Stadium.'”
Shifting to the airport runway had one plus, at least as far as director Jan de Bont was concerned — it let him blow up a plane. Yost wasn't quite as into the exploding plane addition, saying it “makes no fucking sense, but it’s fine, it’s cool.”
Before we move on from Speed, Yost revealed a couple other interesting changes made along the way from his screenplay. Jeff Daniels' character, Detective Harry Temple, was supposed to be revealed as the villain, but it wasn't totally coming together on the page so, as the production start date neared, they decided to simplify things and have a more traditional baddie.
Oh, and the speed the bus couldn't go below wasn't always 50 mph. In the first draft, it was 20 mph. A friend told Yost after reading it that 20 mph wasn't very dramatic and suggested raising it to 50 mph.