No Phase 2 on Zone 3. It's digital audio on the 3600 baud control channel system. Being radio techs, encryption is likely "just because."
On the old VHF turnpike system, there were references to certain frequencies or tones being used from Interchange X to Interchange Y. Now the Troop E is gone, you'll hear Turnpike related MSP traffic on Zone 3 if it's H Patrol 2 or H Patrol 3 as well as some of the DOT Talk Groups.
In general, the information at Scan-NE in the Wiki is more current than on the RRDB. For example, the MA Convention Center Authority has moved to their own Hytera DMR trunk system and isn't on the MSP trunk any longer.
All a hobby for me
My mistake 57680 and 59408 had to look it up in a freescan backup file
I ended up locking them out because the 15x was pretty angry and on the 996 it would not decode so I assumed
it was P2.
As for the DOT Talk Groups all the toll booth numbers are gone and Looking at RR the Alpha tags got changed.
Im finding based over time the talk group numbers got moved around so the RR data base is pretty up to date.
I ended up leaving the ones not used there and renaming the ones that needed updating.
It would be a confusing mess for me to explain whats in my 15x over the years for zone 3.
Im not cutting and pasting or downloading - Im hand pecking them in with my own tags.
Pete N1EXA