Arizona transportation officials are announcing new safety measures to help keep drivers from going the wrong-way.

The Arizona Department of Transportation is showing new signs Wednesday that the agency plans to install at several Phoenix-area freeway interchanges.

ADOT has been studying how to catch the attention of drivers before they enter a freeway heading the wrong direction.

There have been five incidents in the last two months involving wrong-way drivers on metropolitan Phoenix interstates.

The Arizona Department of Public Safety said those accidents resulted in the deaths of seven people, including an off-duty Mesa police officer.

Investigators believe impairment was a factor in all of them.