I worked as a project manager for a telco construction company years ago and learning how to set up road constructions signs and warnings and whatnot was almost

I worked as a project manager for a telco construction company years ago and learning how to set up road constructions signs and warnings and whatnot was almost like learning a programming language. There are so many rules dictating how and where to put signs depending on speed limit, number of lanes, intersection type, etc etc. Then you'd send your plans to the DoT and they'd either approve or reject it with very little information on what you did wrong. It really was the most difficult part of the job.