9.3 Emergency Vehicle Operation (EVOC) & Pursuit Guidelines (CGS 14-283)

9.3 Emergency Vehicle Operation (EVOC) & Pursuit Guidelines (CGS 14-283)

Operating an emergency vehicle during priority calls and pursuit situations represents one of the highest liability activities in modern law enforcement. Emergency Vehicle Operator Course (EVOC) principles and Connecticut General Statutes (CGS) § 14-283 govern the legal privileges, vehicle dynamics, and operating standards for emergency responses. Furthermore, police officers must strictly follow the Connecticut Uniform Statewide Pursuit Policy promulgated by the Police Officer Standards and Training Council (POSTC).

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1. Statutory Privileges & Due Regard (CGS § 14-283)

CGS § 14-283 establishes the statutory authority for operators of authorized emergency vehicles (police cruisers, fire apparatus, ambulances) when responding to emergency calls or pursuing fleeing violators.

Statutory Exemptions Granted

When responding to an emergency call or in pursuit of a suspect, an emergency vehicle operator may:

1. Exceed Posted Speed Limits: Operate above posted speed limits so long as life or property is not endangered.
2. Proceed Past Stop Signs & Red Lights: Disregard traffic control signals and stop signs, but only after slowing down as may be necessary for safe operation.
3. Disregard Directional Regulations: Disregard rules governing direction of movement, turning in specified directions, or parking regulations.

+-------------------------------------------------------------------+
|               MANDATORY DUAL WARNING EQUIPMENT (CGS § 14-283)     |
+-------------------------------------------------------------------+
|   1. AUDIBLE WARNING DEVICE   : Siren or Horn sounding continuous |
|                                 warning                           |
|   2. VISUAL WARNING DEVICE    : Flashing/revolving Red or Red/Blue|
|                                 emergency lights                  |
|                                                                   |
|   * Statutory privileges are invalid unless BOTH are activated!   |
+-------------------------------------------------------------------+

The Non-Negotiable "Due Regard" Standard

The statutory privileges granted under CGS § 14-283 are not absolute. CGS § 14-283(d) explicitly states:

"The provisions of this section shall not relieve the operator of an emergency vehicle from the duty to drive with due regard for the safety of all persons and property."

Due Regard means operating the vehicle in a manner that a reasonably careful and prudent officer, exercising sound professional judgment under similar circumstances, would operate. If an officer operates recklessly or fails to slow down at an intersection, the officer and municipality face civil liability (negligence) and potential criminal prosecution. Emergency warning lights and sirens request the right-of-way from other drivers; they do not guarantee or force it.

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2. EVOC Principles & Vehicle Dynamics

Safe emergency vehicle operation requires mastering basic physical laws governing motor vehicle dynamics:

Kinetic Energy & Stopping Distances

Kinetic energy ($KE$) increases exponentially with speed ($KE = \frac{1}{2}mv^2$). Doubling a cruiser's speed from 30 mph to 60 mph quadruples its kinetic energy, which quadruples the required braking distance. Total stopping distance consists of: $\text{Total Stopping Distance} = \text{Reaction Distance} + \text{Braking Distance}$ At 60 mph, a patrol cruiser travels approximately 88 feet per second; reaction distance alone accounts for ~66 feet before brakes are applied.

Weight Transfer & Cornering Lines

• Weight Transfer: Acceleration shifts weight to the rear tires (reducing front steering traction); braking shifts weight forward (pitch); turning shifts weight laterally to the outside tires (roll). Smooth braking and throttle control prevent loss of traction.
• True Apex Cornering: Taking an outside-inside-outside line through turns maximizes vehicle control and reduces lateral acceleration force ($G$-force).
• Hydroplaning: At speeds as low as 45–50 mph on wet roadways, water pressure creates a wedge under tires, lifting them off the pavement. Officers must avoid sudden steering or braking inputs during hydroplaning.

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3. Connecticut Uniform Statewide Pursuit Policy

Adopted by POSTC pursuant to CGS § 7-294x, the Connecticut Uniform Statewide Pursuit Policy creates mandatory operational rules for all municipal, state, and specialized police officers in Connecticut.

Definition of a Pursuit

A motor vehicle pursuit is an active attempt by a law enforcement officer in an authorized emergency vehicle to apprehend one or more occupants of another moving motor vehicle, when the driver of the fleeing vehicle is aware of the officer's attempt to stop them and is resisting apprehension by maintaining or increasing speed or disregarding traffic control devices.

Mandatory Threshold for Initiating a Pursuit

Under Connecticut statewide policy, an officer MAY ONLY initiate a pursuit when there is reasonable suspicion or probable cause to believe that an occupant of the fleeing vehicle:

• Has committed, or is about to commit, a VIOLENT FELONY involving the threat or use of deadly physical force (e.g., murder, armed robbery, kidnapping, sexual assault), OR
• Presents an immediate threat of death or serious physical harm to officers or the public.

+-------------------------------------------------------------------+
|               CT STATEWIDE PURSUIT THRESHOLD DECISION TREE        |
+-------------------------------------------------------------------+
|  OFFENSE COMMITTED                  |  PURSUIT AUTHORIZED?       |
+-------------------------------------+-----------------------------+
|  Violent Felony (Armed Robbery, etc)|  YES (Subject to Risk Eval) |
|  Property Crime (Larceny, Burglary) |  PROHIBITED ❌             |
|  Stolen Vehicle (Property alone)    |  PROHIBITED ❌             |
|  Infraction / Minor Traffic Offense |  PROHIBITED ❌             |
+-------------------------------------------------------------------+

Continuous Risk vs. Benefit Assessment

Officers and supervisors must continuously evaluate environmental factors:

• Road conditions, weather, and visibility
• Traffic density (pedestrian and vehicular volume)
• Location (school zones, residential neighborhoods vs. rural expressways)
• Capabilities of officer, cruiser, and suspect vehicle

Role of Supervisory Oversight

The field supervisor bears ultimate operational responsibility for pursuit management:

• The supervisor must actively monitor radio communications and environmental conditions.
• The supervisor must order the immediate termination of the pursuit if the risk to the public outweighs the immediate necessity of apprehending the fleeing suspect.
• Supervisory silence does NOT constitute approval. If a supervisor cannot be contacted or fails to respond, the primary officer must reassess and terminate if safety is compromised.

Mandatory Termination Criteria

A pursuit MUST BE IMMEDIATELY TERMINATED when:

1. The supervisor orders termination.
2. The environmental risk (traffic, weather, population density) outweighs the immediate necessity of apprehending the suspect.
3. The suspect's identity is known, allowing later apprehension without risking public safety.
4. Visual contact is lost or the location of the fleeing vehicle is unknown.
5. Radio communication fails or becomes degraded.
6. The emergency vehicle suffers mechanical failure or equipment malfunction (e.g., siren failure).

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4. Pursuit Intervention Tactics & Tire Deflation Devices

When authorized, tactical intervention tactics aim to disable fleeing vehicles safely:

Tire Deflation Devices (TDD / Spike Strips)

Tire deflation devices (e.g., Stop Stick) puncture tires in a controlled manner, allowing air to release slowly.

• Deployment Restrictions: TDDs are STRICTLY PROHIBITED from being deployed against fleeing motorcycles, all-terrain vehicles (ATVs), three-wheeled vehicles, or heavily loaded hazardous material transports, due to severe loss of control, rollover, and fatal ejection hazards.
• Deployment Safety: Officers deploying TDDs must occupy a protected location behind cover (guardrails, trees) and never stand in the direct path of the oncoming fleeing vehicle.

Tactical Pursuit Interventions

Tactics such as the Precision Immobilization Technique (PIT maneuver), vehicle ramming, or road blockades constitute deadly physical force or high-level force and are strictly regulated under state policy, requiring explicit authorization and justification under CGS § 53a-22 standards.