In APCO, Association of Public-Safety Communications Officials 10-codes, 10-55 means "Intoxicated Driver" or "Drunk Driver". It is used to report a motorist suspected of operating a vehicle under the influence of alcohol or drugs, enabling dispatch to alert nearby units and coordinate safe traffic management and enforcement.
Here’s how it might be used in a real-world scenario:
- Officer: "Dispatch, 10-55 at 8th Street and Maple, vehicle swerving, possible DUI."
- Dispatch: "10-4, unit 14, all nearby units advised of 10-55 in progress."
In this exchange, the officer reports a suspected impaired driver. Using 10-55 ensures that nearby units are aware of the potential hazard, allowing for coordinated monitoring, traffic safety measures, and safe apprehension if necessary.
Operational Purpose
10-55 is critical for preventing accidents caused by impaired driving. Quick reporting allows dispatch to coordinate units for safe traffic stops, monitor the vehicle’s location, and take appropriate enforcement action. It also helps protect both the public and the officer handling the situation.
This code is commonly used for erratic driving behavior, DUI checkpoints, reports from other motorists, or situations where a driver appears impaired and poses a danger on the road.
Officer Safety And Coordination
Declaring 10-55 ensures that officers maintain awareness and coordination. Units may update location using 10-20, acknowledge instructions with 10-4, or report temporary unavailability with 10-6. Proper communication reduces risk and ensures backup can arrive if needed.
Variations And Agency Practices
Some agencies use 10-55 strictly for alcohol-impaired drivers, while others include drug impairment or suspected reckless driving. Local protocols may define the level of observation required, documentation, and follow-up procedures.
Plain-Language Alternatives
Agencies emphasizing plain-language communication may replace 10-55 with phrases such as:
- "Suspected impaired driver."
- "Drunk driver reported."
- "Vehicle operating under influence."
Related 10-Codes
Codes commonly associated with 10-55 include 10-4 (acknowledgment), 10-20 (location), 10-50 (accident/crash report), 10-51 (wrecker/tow service), and 10-23 (arrived on scene/standby). Together, these codes support coordinated, safe, and effective response to impaired drivers and traffic hazards.