NYC subway stringlines. "Stringlines are a time & distance chart which illustrate the movement of trains between stations over time. Stringlines are an easy method to visualize operational problems that affect rail service; such as delays, train bunching and gaps in service. Each train trip appears as a string moving diagonally across the chart. This tool was inspired by a NYCT paper describing the creation of their in house stringline tools and is intended to be a free and public equivalent."

NYC subway stringlines

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