Nine more pre-series cars are due to be delivered this year, making up the 10-car test train.
http://www.railwaygazette.com/news/news/n-america/single-view/view/barts-fleet-of-the-future-on-its-way.html
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https://www.youtube.com/watch?v=JMvGrtHW3Oo
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https://www.youtube.com/watch?v=_A1xYp01c-U
https://www.youtube.com/user/BARTable
https://www.youtube.com/watch?v=3b2yedQuhyM ebart
https://www.youtube.com/watch?v=ZaWpKw6H8cw
http://www.railwaygazette.com/news/urban.html