The rolling stock is actually a very significant cost of the system. In DC, they spent $886 million for Kawasaki to build them 428 railcars in one contract, wh

The rolling stock is actually a very significant cost of the system. In DC, they spent $886 million for Kawasaki to build them 428 railcars in one contract, which comes out to just over $2M per car (and a single train normally has 8 cars). According to Wikipedia, they now have 500 of these 7000-series cars in service; that's $1B.