penobscot county maine has 6 rural police patrol zones

https://www.maine.gov/dps/msp/about/find-local-troop/troop-e

apparently they are served either by state police or county sheriff -
depending on who is on duty

state police also have 2 turnpike zones

==================

Troop E maintains an excellent long-standing cooperative resource
coordination agreement with the Penobscot County Sheriff's Department.
Within that relationship, Troop E troopers work daily with deputies.
Penobscot County is divided into six rural patrol zones staffed by
troopers and deputies, and two interstate zones. The southern
interstate zone includes I-395. The interstate zones are always
staffed by troopers. Troop E coordinates investigations and training
with the Penobscot County Deputies.

troop a and b - cover any town that does not have its own police dept

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