Via Shorpy:
Another bird’s-eye view of Eleventh Avenue, a.k.a “Death Avenue,” on New York’s West Side as captured by the Bain News Service circa 1911.
Around 1850, the City of New York began building street-level railroad tracks on Manhattan’s west side. One of the avenues saw so many fatal accidents between the trains and pedestrians, horses, and cars that it became known as Death Avenue. In an effort to reduce the mayhem, men on horses (known as West Side Cowboys) were hired by the rail companies to ride in front of the trains waving red flags.
In 1929, the West Side Improvement Project began, which (among other things) resulted in the construction of elevated rail in place of the dangerous street-level trains. The park-ified remnants of these elevated structures can be enjoyed today as the High Line, a totally awesome place to sit down and eat a sandwich next time you’re in the City.