Action
Notice of availability and request for comments.
Summary
This document provides the public with notice that, on April 21, 2026, the Massachusetts Bay Transportation Authority (MBTA), as the host railroad, submitted a request to permit CSX Transportation, Inc. (CSX) to conduct field testing of the Interoperable Train Control positive train control (PTC) system on two segments of MBTA's North Side Fitchburg and Haverhill Lines utilizing CSX locomotives and equipment. FRA is publishing this notice and inviting public comment on MBTA's request to allow its tenant to test on its PTC system.