Speaking of incomprehensible road signs, here's an anecdote.
In my younger years I lived in a neighborhood in Berkeley, California, near the university's International House, where a great many students from other countries lived. One road sign at a major intersection in that neighborhood was so arcanely phrased that I often wondered what non-native-English-speakers (Did you ever notice how hard it is to make that phrase truly comprehensible in writing, by the way? There's no right way to hyphenate it!) made of it.
The sign read: "Opposing traffic has longer green."
Do you picture, as I did, foreign students leaping out into the middle of the streets to oppose the traffic, in an effort to keep the earth greener?
Come to think of it, this being Berkeley, maybe that was what it meant. That would explain a lot about the way pedestrians tend to interact with automobiles in that community.