From the database page:
The jurisdictional limits of the Turnpike’s Maintenance Department Districts are as follows:
District 1: Mile 0 to Mile 27
District 2: Mile 27 to Mile 50
District 3: Mile 50 to Mile 67.2 and Pearl Harbor Memorial Turnpike Extension
District 4: Mile 67.2 to Mile 90
District 5: Mile 90 to Mile 105
District 6: Mile 105 to Mile E118
District 7: Newark Bay-Hudson County Extension and Interchange 14
District 8: Mile 105 to Mile W118 and north of Turnpike on I-95 (Mile 118 to Mile 122)
The jurisdictional limits of the Turnpike’s Maintenance Roadway Divisions are as follows:
Southern Division: Mile 0 to Mile 67.2 including Pearl Harbor Memorial Turnpike Extension
Northern Division: Mile 67.2 to Mile 122 including Newark Bay – Hudson County Extension
The jurisdictional limits of the Turnpike’s Trades Divisions are as follows:
Southern Division: Mile 0 to Mile 53.3 (Interchange 7)
Central Division: Mile 53.3 to Mile 90 (Interchange 11)
Northern Division: Mile 90 to Mile 122 (Northern terminus)
The jurisdictional limits of the Parkway’s Maintenance Yards are as follows:
Yard 1 (Paramus): Mile 172.3 to Mile 160.1
Yard 2 (Clifton): Mile 160.1 to Mile 150.5
Yard 2U (Union): Mile 150.5 to Mile 141.5
Yard 3 (Clark): Mile 141.5 to Mile 125.0
Yard 4 (Telegraph Hill): Mile 125.0 to Mile 106.4
Yard 4H (Herbertsville): Mile 106.4 to Mile 91.8
Yard 5 (Ocean): Mile 91.8 to Mile 63.8
Yard 6 (White Horse): Mile 63.8 to Mile 30.2
Yard 7 (Swainton): Mile 30.2 to Mile 0.0
I'm almost 100% certain that Talkgroup 19 is the Clark Yard Ops, but need further monitoring to confirm. So in the case of Talkgroup 16, it's probably the Ocean Yard Ops. Running Unitrunker on Telegraph Hill site last night, I did see some activity on Talkgroup 19 (suspected Clark Yard Ops), but nothing on Talkgroup 16.
Also, I have Talkgroup numbers 1, 4, 5, 9, 10, 13-23, 25-30, 33-51 registered in my unitrunker over the past year of running the system on and off. I haven't had the time to post them in the wiki yet. And from what I was told, each district and yard/area on the GSP and TP have their own talkgroup.