I Troop is NCSHP's Special Operations (SOS) and is headquartered in Cary with several district offices throughout the state. At one time I Troop was known as the "interstate cars" but they now do a wide variety of special tasks. Below are the somewhat new I Troop designators and the link to the I Troop webpage;
I1xx - Criminal Interdiction Team (CIT)
I2xx - Motor units
I3xx - Collision Reconstruction Unit (Recon)
I4xx - Aviation
I5xx - HAZMAT
NC DPS: Troop I - Cary