At that meeting, Interim General Manager Jeffrey Gonneville said CRRC’s current schedule puts the remaining Orange Line delivery into next summer, and the final Red Line cars wouldn’t arrive until the summer of 2025.

Source: https://www.bostonherald.com/2023/01/04/mbta-blasts-companys-failure-with-new-orange-red-line-train-production/

Harvard to Broadway is a challenging area to run shuttle service on a weekday, due to what Gonneville described as the fair or great amount of impact on Red Line riders.

Source: https://www.bostonherald.com/2023/02/24/transportation-secretary-criticizes-mbtas-derailment-communication/