BO-1 MEC 507 rolls Southbound through Shop Interlocking on the MBTA's New Hampshire Mainline with 5 loads in tow. The former cantilevered signal from Mystic Junction in Somerville, MA was relocated here and is now the Southbound home for SHOP. Notice the Billerica Shop lead to the left was recently rebuilt as MBTA/Keolis plan to use the area for MOW storage.