I finally figured out ceratin years that older signals were installed, all I had to do was E-mail the traffic signal supervisor of PennDOT!
Here's proof:
(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fuploads.tapatalk-cdn.com%2F20161222%2F328190f0d2843e2a9c8000d83dd4f280.jpg&hash=8e9c06f179ef1ed892706db2f33866dc7fbc965c)
I never knew that it was this easy, now I can stop making threads about when certaint signals were installed.