About PATT
FRA’s 49 CFR Part 219, Control of Alcohol and Drug Use contains requirements for post-accident testing if certain conditions are met. This application is intended to aid railroads and their contractors in determining when...
FRA’s 49 CFR Part 219, Control of Alcohol and Drug Use contains requirements for post-accident testing if certain conditions are met. This application is intended to aid railroads and their contractors in determining when a qualifying accident has occurred that requires Part 219 Subpart C testing. The FRA’s post-accident testing program has been the cornerstone the agency’s drug and alcohol testing efforts since 1985 and pre-dates the publication of most of the rest of Part 219 and the USDOT’s testing procedures regulation, 49 CFR Part 40. Part 219 Subpart C defines the train accident/incident thresholds that require testing. This post-accident testing helps FRA accident investigators determine whether the use of drugs and alcohol by involved railroad employees or contractors may have contributed to the cause or severity of a particular accident. The goal is that each regulated employer (railroad or contractor) is fully prepared to conduct post-accident testing if a rule-triggering event occurs; that the decision to test is made quickly after reasonable inquiry and good faith judgment by an on-site supervisor. Blood and urine collections from surviving employees/contractors must be completed within for (4) hours of the accident with the proper supplies and forms; and blood, urine, and tissue collections from fatally injured personnel must be completed as soon as practicable. In addition, this application is likewise intended to protect employees from inadvertent incursions upon their right-to-privacy represented by tests performed erroneously.
Version History Updated damage threshold for 2026 1.2.5 Jan 19 Adjusted damage threshold for 2025 1.2.4 12/27/2024 Updated for 2024 1.2.3 12/20/2023 Updated monetary threshold and PDFs 1.2.2 01/31/2023 Updated PDFs 1.2.1 02/08/2022 Updated damage threshold. 1.2 02/03/2022 Updated damage threshold 1.1 08/27/2021 1.0 12/06/2018
Previous Versions
Here you can find the changelog of PATT since it was posted on our website on 2023-09-04 20:41:27.
The latest version is 1.2.5 and it was updated on 2026-06-23 16:35:31. See below the changes in each version.
PATT version 1.2.5
Updated At: 2026-06-02
Changes: Version History Updated damage threshold for 2026 1.2.5 Jan 19 Adjusted damage threshold for 2025 1.2.4 12/27/2024 Updated for 2024 1.2.3 12/20/2023 Updated monetary threshold and PDFs 1.2.2 01/31/2023 Updated PDFs 1.2.1 02/08/2022 Updated damage threshold. 1.2 02/03/2022 Updated damage threshold 1.1 08/27/2021 1.0 12/06/2018
PATT version 1.2.5
Updated At: 2026-01-19
Changes: Updated damage threshold for 2026
PATT version 1.2.4
Updated At: 2024-12-27
Changes: Dec 27, 2024
Version 1.2.4
Adjusted damage threshold for 2025
PATT version 1.2.3
Updated At: 2023-12-20
Changes: Dec 20, 2023
Version 1.2.3
Updated for 2024
PATT version 1.2.2
Updated At: 2023-01-31
Changes: Jan 31, 2023
Version 1.2.2
Updated monetary threshold and PDFs
Disclaimer
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