Why didn’t Godzilla cross the road in Pennsylvania?

Pennsylvania has a system in place to keep would-be hackers targeting electronic road signs at bay.

Memorial Day weekend travelers on Pennsylvania’s highways are not likely to see signs of impending doom — via raptor or zombie attack — that have popped up in other areas of the country.

Though electronic road signs can be fairly easy to hack, Pennsylvania has a two-step system is in in place to keep pranksters at bay.

Officials at the state Department of Transportation aren’t saying they will protect you from a Godzilla attack.

But the agency has taken steps to prevent a false alarm.

An electronic roadside sign in San Francisco intended to warn drivers about street delays recently was hacked to read, “TURN BACK” and “GODZILLA ATTACK.”

“Turns out that ‘hacking’ is rather simple,” said Chuck Davis who teaches ethical hacking and computer forensics at Harrisburg University.

Five years ago, a website published step-by-step instructions for hacking electronic signs, highlighting security shortcomings.

Access to PennDOT’s roadside signs, as well as highway advisory radios, is protected with an employee-specific password and a physical locking system, a spokeswoman said.