Federal Motor Vehicle Safety Standards: Anti-Ejection Glazing for Bus Portals; Mandatory Applicability Beginning October 30, 2027

What it does

This document partially grants a petition for reconsideration of the October 30, 2024 final rule that established Federal Motor Vehicle Safety Standard (FMVSS) No. 217a, "Anti-ejection glazing for bus portals; Mandatory applicability beginning October 30, 2027." The standard intends to drive installation of advanced glazing in over-the- road buses (motorcoaches) and other large buses to reduce occupant ejections. This final rule revises the minimum size requirement for applicable portals, adds a figure to illustrate a daylight opening periphery, and clarifies the target location for edge impact tests. This document denies all other portions of the petition for reconsideration, including revising the definition of "daylight opening."

The National Highway Traffic Safety Administration's summary, as published in the Federal Register.

What changed in the regulation

1 part of Title 49 of the Code of Federal Regulations:

49 CFR 571

Wording on eCFR: the day before it took effect and from the day it took effect (first part listed).

Compared with

The National Highway Traffic Safety Administration has published 23 final rules in 2026 so far, compared with 10 in all of 2025.

Counted by the Tribune from Federal Register records since Jan. 1, 2025.

Before this

No earlier Federal Register document under regulation identifier 2127-AM79 since Jan. 1, 2025.

What happens next and when

Effective Date: This final rule is effective January 15, 2026.

The agency's dates, word for word.

Check it yourself

• The document in the Federal Register
• Docket NHTSA-2026-0001 on Regulations.gov
• Title 49 on eCFR

The record as published

Source: the Federal Register (public domain). The document in the Federal Register