# Establishment of United States Area Navigation (RNAV) Routes T-492 and T-494; Eastern United States
> **Rule** · Final rule. · Published 2025-05-12 · Effective 2025-08-07 · 90 FR 20093
## Document
- **Document number:** 2025-08202
- **Category:** other
- **Type:** Rule
- **Action:** Final rule.
- **Citation:** 90 FR 20093
- **Publication date:** 2025-05-12
- **Effective date:** 2025-08-07
- **FAA docket:** Docket No. FAA-2024-2405
## Abstract

This action establishes United States Area Navigation (RNAV) Routes T-492 and T-494 in the eastern United States. This action supports FAA Next Generation Air Transportation System (NextGen) efforts to provide a modern RNAV route structure to improve the safety and efficiency of the National Airspace System (NAS).

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2025/05/12/2025-08202/establishment-of-united-states-area-navigation-rnav-routes-t-492-and-t-494-eastern-united-states)
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