Road width
I'm sure some of these antiquated standards, especially in rural counties, have been lying in some dusty lawbook for years. I remember some years ago, a news story after I had nearly piled up the shop service van at a light in downtown Spkaloo on 2nd street, that the Spokane yellow lights were CONSIDERABLY shorter than the "recommended" U.S. Federal standard.
I had been distracted for a moment by someone on the corner, ended up slamming on the brakes and nearly ended up with a 50 lb can of R22 in my lap, so to speak.