After SOAC finished its run in New York CIty, it toured the nation.

SOAC Visits Boston (The Third Rail, November 1974)

After completion of its New York tour, the State-of-the-Art car (SOAC) moved on to Boston, home of America's oldest subway. 
     Monday, August 19, [1974] marked the beginning of revenue service for the two-car train on the Massachusetts Bay Transportation Authority's "Red" Line, operating between Harvard Station and the light rapid transit extension at Ashmont in Dorchester, and between Harvard and Quincy Center onthe new South Shore Line.
     Its bugs worked out, SOAC showed its stuff on the extension, where it operated at 70 mph speeds, MBTA officicals found that SOAC's operation provided an unexpected benefit: it enabled them to test features of their control procedures not possible with the line's regular trains.
     The one-month Boston tour of DOT's advanced rapid transit train concluded with a September 14 excursion attended by 150 rail buffs. Proceeds from the fantrip were donated to the Jimmy Fund, a popular Boston charity.
     SOAC now moves on to demonstration stays in Cleveland, Chicago and Philadelphia.

A Home for SOAC in South Jersey  (The Third Rail, July-September 1975)

Some small relief for the Lindenwold high-speed line's car shortage is in the cards, thanks to U.S. DOT and its State-of-the-Art Cars (SOAC), which are slated to see service on the Delaware River Port Authority's line.
     SOAC was developed by the DOT's Urban Mass Transportation Administration (UMTA) to showcase innovative ideas in modern rail car design and technology
     Revenue demonstrations of SOAC cars took place in five U.S. rapid rail cities—New York, Chicago, Boston, Cleveland, and Philadelphia—where thousands of riders enjoyed the opportunity to see transit's latest.
     In 1971, UMTA let a contract to the Boeing Vertol Company of Philadelphia to construct and demonstrate a rail car representative of the current state-of-the-art in rail rapid transit. Besides demonstrating technological innovation, the cars were used in actual revenue service to provide passengers with an opportunity to sample equipment designed to make rail transit riding more attractive.
     The unique two-car SOAC unit, 150 feet long, was built by the St. Louis Car Division of General Steel Industries, and underwent extensive testing at the Rail Transit Test Track at DOT's Transportation Test Center in Pueblo, Colorado.
     In addition to standard acceptance tests, the SOAC vehicles underwent a series of engineering tests that produced a standard test procedure for future vehicle programs and a strong baseline set of data against which actual performance could be measured.
     SOAC was then put into simulated revenue service at the Test Center, making "station stops" during 3,000 miles of operation around the ninemile transit test track. Before leaving the Test Center, SOAC had logged 20,000 miles of operation.
     The cars then went on the road, where they operated on the Eighth Avenue "A," Brighton "D," Queens "E," and Sea Beach "N" lines of New York's NYCTA; the Boston area on MBTA's Cambridge-Dorchester and South Shore "Red" lines; the Cleveland Transit System's Airport service; the Chicago Transit Authority's Skokie Swift; and SEPTA'S Broad Street Line in Philadelphia.
     The cars operated 104 total revenue service days in the five cities, carrying 312,500 passengers over 19,595 miles. Passenger reaction was decidedly positive; applause greeted the cars when they first entered Boston's Park Street






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