Some older urban industrial districts was a maze of track work but,nothing like the time waster as there was always room to work also railroads has a tenacy to avoid switch backs that requires moving a spotted car from one industry to get to another since there is safety issues involved and not to mention industry sidings is usually own by the customer up to the derail.
That's why there may be special instructions in the employee time table advising certain locomotives can not operate over (say) William Brothers Mfg track and in some extreme case ALL locomotives can not operate over William Brothers Mfg track.
Oddly I am yet to see that mention in any book on industries or operation I have look through.