# Control Room Hours-of-Service

- **operation:** document
- **citation:** PHMSA CRM HOS
- **title:** Control Room Hours-of-Service
- **source type:** guidance
- **agency:** Pipeline and Hazardous Materials Safety Administration
- **status:** guidance
- **official:** true
- **published on:** Not available
- **effective on:** Not available
- **summary:** PHMSA guidance on emergency deviations from controller hours-of-service limits and the records and countermeasures operators should maintain.
- **machine formats:** - **json:** https://regulus.evalyn.ai/document/phmsa-control-room-hours-of-service.json
- **markdown:** https://regulus.evalyn.ai/document/phmsa-control-room-hours-of-service.md
- **app url:** https://regulus.evalyn.ai/document/phmsa-control-room-hours-of-service
- **source url:** https://www.phmsa.dot.gov/legislative-mandates/pipeline-safety-act/control-room-hours-service
**body:**

The fatigue mitigation provisions in 49 CFR 192.631(d)(4) and 195.446(d)(4) allow emergency deviation from maximum controller hours-of-service when necessary for safe operation. Operators do not need to notify PHMSA solely because a controller exceeds hours-of-service, but must document the deviation. Additional fatigue risks must be addressed through the operator's fatigue mitigation program and available countermeasures should be used during extraordinary conditions.
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- **body characters:** 473