mainline at Columbia Junction, just north of JFK/UMass station. Trains are also stored at Braintree (Caddigan Yard), Ashmont (Codman Yard), and Alewife. Eliot Yard, on the surface near Harvard Square, served East Boston Tunnel cars for a short time and Red Line cars until it was demolished in the 1970s. (East Boston Tunnel cars accessed the yard through the now-closed Joy Street portal near Bowdoin station and a track connection on the Longfellow Bridge). 1912 Cambridge subway and 1928 Dorchester cars The Cambridge subway began service in 1912 with 40 all-steel motor cars built by the Standard Steel Car Company, and 20 cars from the Laconia Car Company. They had a novel design as a result of studies about Boston's existing lines, with a then-extraordinary length of over buffers, and a large standee capacity, while weighing only . They had an all-new door arrangement: three single sliding doors per side evenly distributed along the car's length so that the maximum distance to a door was around . Upon their debut, the new subway cars were the largest in the world; they remained so until the Toronto M1 cars were built in 1962. A similar configuration was later adopted by the BMT's Standard cars in New York and the Broad Street Subway cars in Philadelphia. About of the Boston car was separated by a bulkhead for a smoking compartment. In contrast to the elevated lines, passenger flowthrough was not intended, and every door was used as both entrance and exit. Thirty-five cars of similar design were added in 1919 from the Pressed Steel Car Company, followed by 60 more in 1928 from the Bradley Car Company for the Cambridge–Dorchester subway. 1963 Pullman cars The 1912–1928 Cambridge–Dorchester fleet remained in service until 1963, when it was replaced all at once by 92 married-pair cars from Pullman-Standard numbered 01400–01491. These carbon-steel cars were originally delivered in a blue, white and gold paint scheme (the state colors of the Commonwealth of Massachusetts, which funded their purchase), and retained that color scheme into the early 1980s when most were finally repainted into Red Line colors for the opening of the Alewife Extension. The 01400s (or 1400s) were the last pre-MBTA transit cars and also the last ones built without air conditioning. All were retired from passenger service by 1994 due to mechanical and electrical equipment not being able to operate with six-car trains. With delivery