Tony Stewart's spotter, Bob Jeffrey, came across an interesting road sign while rolling through the state of Oklahoma.

Jeffrey tweeted a picture of the signs, which states, "Do not drive into Smoke." Smoke, of course, is Stewart's nickname.

A helpful message for motorists also acts as a very beneficial piece of advice for Sprint Cup Series drivers, as Stewart gets ready to compete for a championship one final time.

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To use a classic quote from comedian Bill Engvall, "Here's your sign."