Seashore Museum Pics 4 - SOAC: Below is a picture of two 1972 experimental rail cars called the SOAC, which was an acronym for State Of Art Cars. These were designed by the USDOT and built by St. Louis Car Co. Although toured and tested in four major subway systems (i.e., NYC, Boston, Philadelphia and Chicago), these two demonstrator cars were quickly and quietly withdrawn from service and the USDOT got out of the rapid transit design business. The above pic was taken on an early fall ride up to Maine. I will post more as I get them converted from RAW.