Commuters in the St. John's area who might have been expecting a heads-up about construction delays were instead warned about something else: zombies.

"Zombie invasion! Run!" said one of the messages that appeared on an electronic traffic sign positioned near Windsor Lake, one of the main water supplies in St. John's.

The sign, which had been expected to advise motorists of construction that started Monday on Portugal Cove Road, had been programmed with other messages, including "Expect apocalyptic doom!"

A final message said, "Rule #2: Double tap!", a line from the 2009 Woody Harrelson comedy Zombieland.

City crews later arrived to turn off the sign, and then carted it away.