Note that because of the way it was shot in different San Francisco locations, some of the chases cut from one place to another.
> Find out more about Bullitt at Wikipedia
> IMDb entry for the film
> More about the San Francisco locations for the Bullitt chase
> An in depth article about the Bullitt car chase from 1987
> IGN’s Top 10 car chases on film (note the interesting bit of trivia about their offices)