 When a location was being picked for the plane escape, one  consideration was closing I405 or a stretch of another highway to  land a Learjet on, but that was "out of their reach", so they shut  down the 6th St Bridge from 6pm to 5am every night for filming, and  used CGI effects for the planes approach. The scene with the  aircraft taking off was actually done, with an aircraft equipped  with a V8 engine so they could drive it down the bridge.