Just to let you know they can and do run plates in PA. I live outside of Philadelphia and within the last year it was reported in the newspaper that some police vehicles in the city had a new high tech camera device connected to a computer that can scan license plates as an officer drives down the street. It's being used by Traffic Court as well. I know most departments don't have this type of technology, but it is available and used. I imagine it will become more common over time.
I couldn't find the article that I was looking for, but page 5 of this document (http://www.watchyourcar.org/content/?item=4503) discusses the use of something like it in Lehigh County, PA.
I couldn't find the article that I was looking for, but page 5 of this document (http://www.watchyourcar.org/content/?item=4503) discusses the use of something like it in Lehigh County, PA.

