# Federal Motor Vehicle Safety Standards; Anti-Ejection Glazing for Bus Portals; Bus Emergency Exits and Window Retention and Release
> **National Highway Traffic Safety Administration** · Final rule. · Published 2024-10-30 · Effective 2024-12-30 · 89 FR 86255
## Document
- **Document number:** 2024-24462
- **Category:** fmvss
- **Sub-agency:** National Highway Traffic Safety Administration
- **Federal Register citation:** 89 FR 86255
- **CFR reference:** 49 CFR 571
- **Publication date:** 2024-10-30
- **Effective date:** 2024-12-30
- **DOT docket:** Docket No. NHTSA-2024-0061
## Abstract

This final rule establishes Federal Motor Vehicle Safety Standard (FMVSS) No. 217a, "Anti-ejection glazing for bus portals; Mandatory applicability beginning October 30, 2027," to drive the installation of advanced glazing in over-the-road buses (motorcoaches) and other large buses to reduce passenger and driver ejections. This final rule, issued pursuant to the Moving Ahead for Progress in the 21st Century Act (MAP-21), specifies impactor tests of the glazing material of side and roof windows. The impactor and impact speed simulate the loading from an average size unrestrained adult male impacting a window on the opposite side of a large bus in a rollover.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2024/10/30/2024-24462/federal-motor-vehicle-safety-standards-anti-ejection-glazing-for-bus-portals-bus-emergency-exits-and)
---
*AI Analytics · CC0 1.0*