I think that's basically true for the last sign. Sometimes there's a sign at say 2 miles then one close to the exit. The first one may not be on the left for left hand exit. I know that's true because I've had to move across multiple lanes to make an exit. Especially in large cities where there's lot's of entrances and exits.
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Hank
70 Chevelle SS396(454), M20, 3.73
My Chevelle
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