Answer: rwy

AnswerCrossword Clue
RWYStreetcar line (abbr.)
RWYAmtrak, for ex.
RWYLine with tracks (abbr.)
RWYLetters after either Cowboy St. senator's name
RWYTrain syst.
RWYErie Lackawanna, e.g.: Abbr.
RWYThe Orient Express, e.g.: Abbr.
RWYFreight carrier: Abbr.
RWYTrain network: Abbr.
RWYTrain system: Abbr.