DURHAM (WTVD) -- NCDOT and North Carolina State researchers are studying the effectiveness of the "zipper merge." The rather unique sign was installed 2 weeks ago where NC 147 meets southbound I-85.
Perhaps inspired by this thread, or maybe just because I have to deal with this situation ever day, I got to wondering - do you know the difference between these 2 signs? Be honest! I know a lot of ...
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