> **PROPOSED: not yet in effect** · 2026-10-23
> NHTSA announced the proposed FMVSS 108 amendments on Oct 23 2026 (docket NHTSA-2026-1519).

_Regulation · Safety standard · proposed_

# NHTSA Proposed FMVSS 108 Lighting Updates for ADS Vehicles, Including Cyan ADS Marker Lamps

Canonical ID: `0fcda19f-a5cb-49da-8c17-7ca1c3b82868`

- **Jurisdiction:** [United States](/locations/united-states.md) (id: `aa8b9c05-c836-4021-801f-59801970401e`)
- **Kind:** `safety_standard`
- **Status (derived):** proposed

NHTSA proposed updating FMVSS No. 108 for vehicles driven only by automated driving systems. The proposal sets color (cyan), mounting, activation and visibility specs for optional ADS marker lamps, eases manual turn signal, hazard and beam-switching control rules for ADS-only vehicles, and modernizes headlamp test voltage and vertical beam order rules. Docket NHTSA-2026-1519; a 30-day comment period opens once the notice is published in the Federal Register.

## Sources (2)

1. **Trump's Transportation Department Makes Commonsense Updates to Vehicle Lighting Standards for AVs** · https://www.nhtsa.gov/press-releases/vehicle-lighting-updates-automated-vehicles · 2026-10-23
2. **NHTSA proposes cyan lights for robotaxis, following Mercedes/China** · https://electrek.co/2026/10/24/nhtsa-proposes-cyan-lights-for-robotaxis-following-mercedes-china/ · 2026-10-24

## Status history

- **proposed** · 2026-10-23 · NHTSA press release
    - NHTSA announced the proposed FMVSS 108 amendments on Oct 23 2026 (docket NHTSA-2026-1519).

## Common questions

### What does NHTSA Proposed FMVSS 108 Lighting Updates for ADS Vehicles, Including Cyan ADS Marker Lamps cover?

NHTSA proposed updating FMVSS No. 108 for vehicles driven only by automated driving systems. The proposal sets color (cyan), mounting, activation and visibility specs for optional ADS marker lamps, eases manual turn signal, hazard and beam-switching control rules for ADS-only vehicles, and modernizes headlamp test voltage and vertical beam order rules. Docket NHTSA-2026-1519; a 30-day comment period opens once the notice is published in the Federal Register.

### Where does NHTSA Proposed FMVSS 108 Lighting Updates for ADS Vehicles, Including Cyan ADS Marker Lamps apply?

NHTSA Proposed FMVSS 108 Lighting Updates for ADS Vehicles, Including Cyan ADS Marker Lamps is recorded as a safety_standard applying in [United States](/locations/united-states.md) on the DEPLOY registry.

### Is NHTSA Proposed FMVSS 108 Lighting Updates for ADS Vehicles, Including Cyan ADS Marker Lamps still in effect?

NHTSA Proposed FMVSS 108 Lighting Updates for ADS Vehicles, Including Cyan ADS Marker Lamps is proposed but not yet in effect; subject to revision before adoption.

### What types of robots does NHTSA Proposed FMVSS 108 Lighting Updates for ADS Vehicles, Including Cyan ADS Marker Lamps apply to?

NHTSA Proposed FMVSS 108 Lighting Updates for ADS Vehicles, Including Cyan ADS Marker Lamps is recorded as applying to autonomous vehicles on the DEPLOY registry.

### Which robot models on the DEPLOY registry fall under NHTSA Proposed FMVSS 108 Lighting Updates for ADS Vehicles, Including Cyan ADS Marker Lamps?

8 robot models on the DEPLOY registry match the form-factor scope of NHTSA Proposed FMVSS 108 Lighting Updates for ADS Vehicles, Including Cyan ADS Marker Lamps: [ASI Autonomous Vehicle](/models/asi-vehicle.md), [Apollo RT6](/models/apollo-rt6.md), [Argo AI Self-Driving System](/models/argo-ai-self-driving-system.md), [Aurora Driver](/models/aurora-driver.md) and 4 others. Form-factor scope match does not by itself establish compliance status; review the underlying primary sources for each operator.


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