Therefore, jaywalker is an analogy of person who does something city people don't do. "No Jaywalker" sign is to remind people not to do something strange that the others don't do which, in turn, violates the law.
Pedestrian = People on sidewalk
Analogy = A comparison to something similarly
Clumsy = Awkward, lacking pysical condition
Ironically = Adv. for ironic means compare something to somethingelse in a negative or funny way.
Some sources from http://www.thefreedictionary.com
*Each word can have more than one meaning. The meaning here is just to favor the article
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