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This video, Why US Signs Look Different Than The Rest Of The World’s, contains a lot of examples of such US road signs that depend on English text to convey their message:

https://www.youtube.com/watch?v=Wzr0GYfRsKI

In the US, traffic signs with crucial information are often written in only English text, no symbols, pictograms or anything else that could make it possible to guess what the sign is saying without being able to read English.