Philadelphia police have ordered 150 new patrol cars with ballistic side windows that can protect the occupants from pistol and shotgun fire.

The vehicles have ballistic shields affixed to the front door panels and what is dubbed "transparent armor" backstops a large portion of the original equipment glass in the front windows.

Last year two Philadelphia officers, Jesse Hartnett and Sylvia Young, survived being shot while sitting in their patrol cars.

"We believe ballistic protections like this would have probably protected them from any of those gunshots aimed at them," Commissioner Richard Ross 6ABC.