Data / Federal rules / 2026-17788
Expanding Certain Locomotive Wheel Set Diameter Variations
The Federal Railroad Administration published this final rule in the Federal Register on August 31, 2026. It took effect on September 30, 2026.
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What the agency says
This rule amends FRA's locomotive safety regulations to expand the maximum permitted variation in diameter for locomotive wheel sets using alternating current technology, in response to a Class I railroad's May 2019 petition for rulemaking and innovations in traction motor control.
Key facts
- Document number
- 2026-17788
- Type
- Final rule
- Action
- Final rule
- Agency
- Transportation Department; Federal Railroad Administration
- Published
- August 31, 2026
- Takes effect
- September 30, 2026
- Dates
- This rule is effective September 30, 2026.
- Docket
- Docket No. FRA-2025-0126
- Regulation ID (RIN)
- 2130-AD50
- Code of Federal Regulations
- 49 CFR 229
- Topics
- Penalties; Railroad safety; Reporting and recordkeeping requirements
- Pages
- 4
Other documents from the Federal Railroad Administration
| Document | Type | Published |
|---|---|---|
| National Environmental Policy Act Regulations 2026-17904 · significant | Final rule | Sep 1 |
| Permitting Use of Computer-Based, Three-Dimensional Simulation for Periodic Refresher Training on Brake Systems 2026-17792 | Final rule | Aug 31 |
| Miscellaneous Amendments to FRA's Accident Reporting Regulations 2026-17791 | Final rule | Aug 31 |
| Retiring Form FRA F 6180.107 and Form FRA F 6180.150 2026-17790 | Final rule | Aug 31 |
| Repealing Outdated Railroad Workplace Safety Requirements and Making Other Improvements 2026-17789 | Final rule | Aug 31 |
| Repealing Special Approval Requirement for Freight Cars More Than 50 Years Old 2026-17787 | Final rule | Aug 31 |
| Enhancing Railroad Discretion in Sounding Locomotive Horns at Passenger Stations 2026-17786 | Final rule | Aug 31 |
| Amendments to Brake System Maintenance and Inspection Requirements 2026-17784 | Final rule | Aug 31 |
Everything from the Federal Railroad Administration · Rules on penalties · Rules on railroad safety · Rules on reporting and recordkeeping requirements · Published in August 2026
Read from the Federal Register API, last updated 2026-10-23. The document on federalregister.gov is the official record; dates and dockets can change through later corrections. Free to reuse with credit to SpecStream under CC BY 4.0.