Transportation officials in Texas are scrambling to prevent hackers from changing messages on digital road signs after one sign in Austin was altered to read, "Zombies Ahead."

ADDCO Chief Operating Officer Brian Nicholson told FOXNews.com that the company is sending out notices to customers on the potentially dangerous security flaw.

In the meantime, if you're driving in Austin, you can rest assured: There are no zombies ahead.

Hackers Crack Into Texas Road Sign, Warn of Zombies Ahead