When I need to make a court appearance in downtown Los Angeles, I generally hop on Los Angeles' Metro Rail light rail system. There is a station convenient to my office, and another downtown convenient to the county courthouse, and the roundtrip fare is much less than the cost of parking.
As with most any other public facility, Metro Rail stations come equipped with helpful signs to alert passengers to the Do's and Don't's of Good Transit Citizenry.
Here is an example, posted on a pillar in the station near my office:
So many rules, so much good advice, and all conveyed in the three official languages of California Public Spaces: English, Spanish, and Pan-Global Semiotic.
You don't have to be a Harvard Symbologist, or literate in English or Spanish, to appreciate the elegance and clarity with which this sign conveys its Helpful Hints on good Metro Rail behavior. Just one look, that's all it took, to interpret these universal signifiers:
"We Warned You It Was Sticky"
"Forward and Lateral Passing Only"
the Dinosaur Footies
Are Kinda Cool"
[Posted on the advice of the Brussels Transit Authority.]
"No Cussing, Tintin!"