Considering Amazon helped pay for the South Lake Union streetcar, I imagine that this announcement will expedite the approvals for and the construction of the BQX street car.
Even the city's own, goosed up business case looks poor. The conversation has shifted from "let's fund this with only property taxes" to "let's fund this with public money because this will never pay for itself."
https://www.crainsnewyork.com/article/20180830/REAL_ESTATE/1...
What do you mean by car lengths? I thought all nyc subway trains had the same # of cars