Something’s not “Normal” around here …

Pop quiz, hot shot. Without looking on a map, what’s the name of the missing road in this sequence:

Broadway Street, Salem Street, ????, Chestnut Street.

If you get your geography lessons from taverns and bars, you’d identify it as Normal Street. However, the road’s correct name is Normal Avenue.
Unfortunately, it appears Chico’s signmakers may have been spending too much time at the bar and not looking at their maps.
Signs hung at the newly signalized intersection of Normal Avenue and West Second Street say the road is “Normal Street.”
All of this raises several questions — How did this mistake happen? How much will this goof cost to fix? Was it a conspiracy? Perhaps it was a clever publicity play by the owners of the Normal St. Bar to further ingrain their geographically incorrect name among the town’s denizens.