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This pic is from August 2017. I've traveled this segment by rail several times; I have not been on the adjacent roadways. This slogan sounds a bit resentful.
Resentful? The slogan represents Trenton's history of a manufacturing city.
I believe the full slogan was (at one time), 'What Trenton Makes The World Takes.'
If you can control the meaning of words, you can control the people who must use them.
You were on an Amtrak train, most likely. Also, the Delaware River looked pretty high for once.