They use the NJ Transit trunk system for at least the commuter lines. I seem to recall someone posting at least 1 conventional freq at one time as well.
The 31 South Orange Avenue and 24/44 O-N-E Bus Coach USA services can be found on the NJTransit North trunked system. The talk group is 401-04. They do not use a conventional frequency. A conventional frequency is(?) /was used for the Coach USA operation operating as Red & Tan in Hudson County.