res148cue said:
What I believe you are referring to is not zone numbers but areas. I have heard the Sgt. at Netcong give areas to troop cars at the start of a shift. They are not one in the same. We might not ever know what the "areas" are.
"Areas" are a group of "zones" that are usually located next to or near each other. For Somerville, the one area may cover all of the zones on I-78, while the other areas may cover 440 and southern 287 with a 3rd area covering northern 287.
Perryville is similar, with area 1 being Bloomsbury and Bethlehem, area 2 = Union Twp., and area 3 = I-287 from Clinton eastward to the 287 interchange, Hampton, Glen Gardner, and Lebanon Boro.