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The California Highway Patrol

Collision Investigation Unit

    The Collision Investigation Unit (CIU) was established March 1, 1999, in the Enforcement & Planning Division. The unit is the result of combining two programs: Accident Investigation (AI) Training and Multidisciplinary Accident Investigation Team (MAIT) Programs. The CIU will continue to develop this site as a means to provide service in answering frequently asked questions, on-line publications, training information and more.

    The unit is responsible for providing advice on coding issues; revising HPM 110.5, Collision Investigation Manual; HPM 110.1, MAIT Operations Manual; the CHP 555, Traffic Collision Report; and all phases of accident investigation training. We are also assisting in the further development of the California Automated Reporting System (CARS).

    Frequently Asked Questions: Collision Investigation Unit

    • Multidisciplinary Accident Investigation Team (MAIT)
    • Accident Investigation (AI Training)

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