Night Work Operations
Night work adds a visibility challenge on top of everything a daytime operation requires. This guide covers the considerations specific to running a work zone after dark.
Last reviewed: June 24, 2026
What It Is
Night work operations run a work zone after dark, when reduced visibility makes device retroreflectivity, lighting, and worker visibility especially important.
Key Compliance Considerations
- Signs and devices must be visible in low light, generally through retroreflectivity.
- Lighting must help without creating glare for drivers.
- Permitted night work hours must be followed.
Planning Focus
- Confirm the permit allows night work and its hours.
- Confirm device retroreflectivity and lighting requirements.
- Confirm worker high-visibility apparel appropriate for night.
Field Focus
- Use retroreflective or otherwise visible devices along the full setup.
- Provide work-area lighting without glare toward drivers.
- Replace devices that lose night visibility.
Common Failures for This Operation
- Devices that are not visible at night.
- Lighting that creates glare for approaching drivers.
- Working outside the permitted night hours.