OK, this has nothing to do with teaching, but I have nothing better to do, plus I'm curious ...
Walking home today, I noticed that Chicago has color-coded the no-parking signs tied to trees for the week of street cleaning. Red equals no parking on Tuesday. Yellow, no parking on Wednesday. Green, Thursday. For as long as I remember, they've been orange.
Seems like a terrible waste of money, doesn't it?
First, of all, there's the added cost of the color. Or maybe that price doesn't change? The signs have to be printed on some color, so maybe the different colors don't affect cost.
More importantly, though, what's always bothered me about this system is the cost of having people walk up and down each street in the city, once to put up the signs, and then again to take them down.
So, I'm curious ...
Is this system cheaper than putting up permanent signs, maybe one or two per block, that say something like "no parking on the second and fourth Tuesday of each month"? We already have plenty of other signs and posts, so there shouldn't be too much extra cost in that.
It seems that every city I've ever visited has some sort of permanent signs up on each block. Signs that don't get ruined in the weather, that won't fall off and disappear, that don't require constant distribution and collection.
And are there other cities out there that actually have people attaching cardboard signs to trees and lamp posts on the day of street cleaning?