AirTrain connects JFK airport with Jamaica Station (among others). It's smooth, futuristic, and very convenient. I think SFO's building their own AirTrain, to connect with, well, something, I'm sure. Maybe BART or Caltrain. In any event, JFK's AirTrain was nifty. And, I had both cars in my module completely to myself after we left the airport terminals proper.
The switches were cool looking but my train always kept going straight.
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