The challenge for September is...
"Street Signs"
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Explanation?
Certainly.
September is on of the four month with only 30 days. Hmm...what happened in the 1930's? Well ~ among other things, the first diesel automobile trip was completed, and NYC started installing traffic lights to warm people to slow down. Another effective way to warn drivers is signage! Street signs warn drivers!! There are even some really funny street signs out there! Can you find them?