I used to work for CalTrans, here in California. It is the department of transportation and I was a heavy equipment mechanic apprentice and then I worked the highways in So Cal as a landraper (landscaper).
Once I ended my working relationship with the "good 'ol boy" program, I used my old CalTrans shirt as a Halloween costume. It always scared the crap outta me anyway. I still get a nervous twitch when I see the color "Omaha Orange".
This year, while perusing the local ASPCA thrift store, my son zeroed in on a CalTrans shirt. I did not deliberately influence him on this at all.
Here is my costume from like 12 years ago.
I have actaully worn this costume a few times. I have gotten some "mileage" out of it. Hee hee.
Maybe next year, the boy and I will go as twins.