Here are a few street signs I’ve seen in Northern Ireland the last few days, along with their American English translations.
“No drinking.” I’ve seen this a lot more in Ireland than in the US.
2 for 1: “Pick up after your dog” + “Dogs must be kept on leash.” I’ve also seen “Leash pets and obey poop laws” in the US, if you want to be super efficient.
Another 2 for 1: “No Drinking” + “No Littering”
Of course, the US does not always have the most efficient signs…
I think this sign wins for efficiency. The US translation: “No littering” + “Pick up after pet”