Amtrak says train operations resumed after a concentrated construction period in the First Street Tunnel south of Washington Union Station. Its 26 October release reports completion of the nine-day Pause for Progress work, which required temporary changes to services travelling south from the capital.
The project focused on A-Interlocking, a track and control point used by Amtrak and Virginia Railway Express trains moving between Washington and Virginia. This is infrastructure shared by services whose passengers may have different origins and destinations.
Crews replaced switches and crossovers, rehabilitated the tunnel's track base and installed electric switching systems. These are changes to the equipment and track structure that support train movements. Amtrak presents the work as an investment in longer-term reliability.
The company coordinated the interruption with VRE, the Virginia Passenger Rail Authority and North Carolina's transport department. It also acknowledged cooperation from freight railways and Washington's transit authority. Managing the outage involved the wider network as well as the tunnel itself.
The announcement identifies temporary service changes between 16 and 26 October. It also says some express-bus services introduced in support of the works would continue for holiday travel, showing that parts of the temporary transport response could outlast the construction period.
The reported milestone is completion of this planned project and restoration of operations at that point. It is not a guarantee that every subsequent train will be unaffected by unrelated disruption. Passengers should interpret the release as an infrastructure update, with their actual service information tied to the date and journey concerned.