at is proposed for relocation later in the 2020s. A new midday layover yard at the former Beacon Park Yard is planned to be constructed by 2032 as part of the realignment of I-90. A large midday and overnight layover yard, which would support expanded service including regional rail and electrification, is planned at Widett Circle near South Station. The MBTA also plans to construct a southside maintenance and layover facility at in 2023–2028, replacing the existing layover yard there, as the Grand Junction Branch will be closed for several years during the I-90 project. Locomotive fleet , the MBTA owned 110 locomotives. Of these, 89 were in active passenger service and two used for work service. Twelve were undergoing rebuild, three awaiting repairs, and four retired and awaiting disposition. All passenger locomotives are equipped with head end power. Rebuilding of 37 F40PHM-2C and F40PHM-2C locomotives to F40PH-3C class by MotivePower (MPI) began in 2017; other older locomotives are also being rebuilt by MPI or in-house. Coach fleet , the MBTA owned 475 coaches. Of these, 399 were in active service, nine being repaired or overhauled, 16 leased to the Connecticut Department of Transportation (ConnDOT) for use on the Hartford Line, and 51 pending disposition or reuse. Coaches whose designations start with BTC (Blind Trailer Coach) are conventional coaches, while those starting with CTC (Control Trailer Coach) are cab cars. Coaches acquired before 1990 were single-level cars with 88 to 127 seats; those since are bilevel cars with 173 to 185 seats. Some coaches are equipped with electronic doors for use on the Old Colony Lines and Greenbush Line, which have full-length high-level platforms at all stops. All BTC-3, CTC-3, BTC-4C, and BTC-4D coaches have restrooms. During winter months, a Ski Train serving Wachusett Mountain runs on the Fitchburg Line, using a coach car which is equipped for carrying bicycles or skis. Three converted coaches – a bike car and two cafe cars – are reserved for the CapeFLYER. The agency issued a $279 million contract (total project cost of $345 million) for 80 additional Rotem bilevel coaches in September 2019, with delivery expected from September 2022 to June 2024. The contract was later modified to 83 coaches, of which 43 are cab cars. The first four of the 83 bilevel cars arrived in June 2022; they are expected to enter service in late 2022. An additional procurement of 100