My impression was they hit that mark a few years ago, albeit, I only listened to Trenton rail station and the River Line from Trenton to Camden and I don't listen anymore, so I could be wrong, but to my knowledge they're all encrypted.. Amtrak police who patrolled Trenton train station or Trenton Transportation Center are still in the clear on the Trenton repeater or should I say Morrisville, Pennsylvania repeater right across the river on the national Amtrak police radio frequency with a PL tone of 100.0