The subway route that survived a railroad's collapse

Countries & Cities · Published 15 October 2026 Swipe more like this →

In short: The New York City Subway's 5 train isn't just a transit line; it is a salvaged piece of industrial history. It absorbed the remains of a defunct private commuter railroad, evolving from a failed regional dream into one of the city's busiest urban arteries.

The 5 train operates on the IRT Lexington Avenue Line, identifiable by its forest green 'bullet'. While it serves as a vital link between Eastchester-Dyre Avenue in the Bronx and Flatbush Avenue in Brooklyn today, its northern section was originally part of the New York, Westchester and Boston Railway. Constructed by the New York, New Haven and Hartford Railroad, this private commuter line suffered a downturn before shutting down during 1937.

The City of New York purchased the defunct railway in 1940. Plans to restore it as a regional line into Westchester County failed, leading the city to scrap much of the old trackage by 1943. However, they integrated the section between East 180th Street and Dyre Avenue into the subway system. This segment began operating as a shuttle in 1941 with no late-night service and required passengers to use 'paper transfers' because there were no physical track connections between lines at the time.

The integration was a complex engineering feat. A flyover connection opened in 1957, finally enabling through service from Manhattan to Dyre Avenue. The route has undergone constant optimization: in 1965, it officially became part of the 5 service, and by 1980, its color was standardized to forest green. Despite these transitions, some logistical hurdles remain; for instance, stations north of East 180th Street are unique in the system for lacking 24-hour staffed booths.

The evolution of the 5 highlights a recurring tension between operational simplicity and passenger preference. In 1995, transit officials debated whether to simplify operations by running all 5 trains via the Dyre Avenue Line. They ultimately decided against it because market research showed riders north of East 180th Street preferred Lexington Avenue Line service over the alternative, choosing to maintain a complex web of express and local patterns to satisfy commuter demand.

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