# 2025-21619: Autonomous Trucks Seek Exemption for High-Tech Breakdown Alerts

2025-21619, Parts and Accessories Necessary for Safe Operation; Application for Exemption From Intelligent Motorist Alert Messaging Systems, is a Federal Register notice from Transportation Department, Federal Motor Carrier Safety Administration published 2025-12-01, effective Comments must be received on or before December 31, 2025; applicant seeks a 5-year exemption. (as of 2026-06-08).

- Canonical: https://policyrisk.com/federal-register/2025-21619
- As of: 2026-06-08
- Plain-text twin of the page above; the HTML and this file carry the same facts.

## Facts
- Document number: 2025-21619
- Title: Parts and Accessories Necessary for Safe Operation; Application for Exemption From Intelligent Motorist Alert Messaging Systems
- Type: Notice
- Agencies: Transportation Department; Federal Motor Carrier Safety Administration
- Citation: 90 FR 55236
- Published: 2025-12-01
- Effective: Comments must be received on or before December 31, 2025; applicant seeks a 5-year exemption.
- Comments close: 2025-12-31
- Significant: no
- Touches household money: no
- Regulation identifier numbers: none
- Last updated: 2026-06-08

## In one line

Autonomous Trucks Seek Exemption for High-Tech Breakdown Alerts

## Summary

The Federal Motor Carrier Safety Administration is considering a 5-year exemption that would let self-driving big trucks use cool digital LED message boards instead of old-school warning lights when they break down. This change affects companies running autonomous commercial trucks and could make roadside alerts clearer and more high-tech. If you have thoughts, speak up by December 31, 2025—no cost changes yet, just a chance to weigh in!

## Abstract

FMCSA requests public comment on an application for a 5-year exemption submitted by Intelligent Motorist Alert Messaging Systems (IMAMS). The applicant seeks an exemption for autonomous commercial motor vehicles (CMVs) from the regulation that requires the use of traditional warning devices to alert other vehicles when the CMV has become disabled. The exemption would allow autonomous CMVs to use IMAMS dynamic digital LED messaging platform as an alternative to traditional warning devices. FMCSA requests public comment on IMAMS's application.

## Effects PRIA read

- 5‑Year Exemption for Autonomous Trucks: benefit, medium. A company asked FMCSA for a 5-year exemption to let autonomous commercial motor vehicles (CMVs) use the IMAMS dynamic digital LED messaging platform instead of the required physical warning devices. The request would require an exemption from 49 CFR 392.22(b)(1) and (2) and 49 CFR 393.95(f)(1) and…
- Automated LED Roadside Alerts: benefit, low. The IMAMS system would automatically show high-visibility LED messages such as "ALERT-ALERT," "MOVE OVER," "SLOW DOWN," and "DISABLED VEHICLE" when an autonomous CMV activates its emergency flashers. The applicant says this automatic messaging will eliminate delays and risks from manually placing t…

## Related documents

- [2026-08144](https://policyrisk.com/federal-register/2026-08144): Administrative Rulemaking, Guidance, and Enforcement Procedures, 2026-04-27
- [2026-20734](https://policyrisk.com/federal-register/2026-20734): Parts and Accessories Necessary for Safe Operation; Application for Exemption From Aurora Operations, Inc (USDOT #341156), 2026-10-09
- [2026-20649](https://policyrisk.com/federal-register/2026-20649): Qualification of Drivers; Commercial Vehicle Safety Alliance; Application for Exemption, 2026-10-08
- [2026-20524](https://policyrisk.com/federal-register/2026-20524): Agency Information Collection Activities; New Information Collection: Hours of Service of Drivers; Pilot Program To Allow Commercial Driver…, 2026-10-07
- [2026-20476](https://policyrisk.com/federal-register/2026-20476): Agency Information Collection Activities; New Information Collection: Hours of Service of Drivers: Pilot Program To Allow Commercial Driver…, 2026-10-06
- [2026-20325](https://policyrisk.com/federal-register/2026-20325): Clarification to the Applicability of Emergency Exemptions; Response to Petitions for Reconsideration, 2026-10-05

## Sources
- [2025-21619 on federalregister.gov](https://www.federalregister.gov/documents/2025/12/01/2025-21619/parts-and-accessories-necessary-for-safe-operation-application-for-exemption-from-intelligent)
- [2025-21619 as published (PDF)](https://www.govinfo.gov/content/pkg/FR-2025-12-01/pdf/2025-21619.pdf)

## Related
- [Previous: 2025-21618, Information Collection Being Reviewed by the Federal Communications Commission…](https://policyrisk.com/federal-register/2025-21618)
- [Next: 2025-21621, Request for Information: Streamlining the Call Report](https://policyrisk.com/federal-register/2025-21621)
- [All Federal Register documents](https://policyrisk.com/federal-register)

Source: PRIA, https://policyrisk.com/federal-register/2025-21619 (as of 2026-06-08).