Sign sign everywhere a sign

parking sign

I have written about the wonderful signage around our fair city before. Maybe I notice them more than most people because I take so many photos around town.  They are everywhere and are like the dog ordinance sign I wrote about last July they can be confusing. Most of the signage around town has something to do with parking or to be accurate not parking.  When they first started using the signs like the one above I thought they meant that I could not park in the spot without a handicap permit.  Who designs these things?