 It suggests that there is so much to do and so little time to do it in that even traveling time must be used to serve additional functions.It also serves the purposes of smoothing transitions from one location to another and adding visual interest to what might otherwise be static "talking heads" sequences.The main "Law & Order" series in the U.S. have used the technique to this purpose occasionally, and all three shows in the now-defunct "CSI" franchise used it frequently.