It’s been a week since Citi Bike released a trove of data on bike-share trips, and the public is already using the information to pick out patterns in ridership and glean new details about the demographics of Citi Bike riders.
In addition to identifying the busiest late-night stations to map nightlife hotspots, statistician Ben Wellington at I Quant NY used a neat feature in the data to show which stations attract different types of Citi Bike riders.
Riders in Midtown, for example, tend to be slightly older and overwhelmingly male. The share of female riders is highest in the Lower East Side and Chinatown. When it comes to age, however, those neighborhoods are split: The East Village has some of the system’s youngest average ridership, while users of stations near public housing and co-ops near the Williamsburg Bridge are, on average, among the system’s oldest.
Wellington also used the data to verify what many New Yorkers could tell you by intuition: Casual users who purchase day or week passes are concentrated near popular tourist destinations in Midtown, the Financial District, and along the Hudson River Greenway.
While DOT said before Citi Bike’s launch that the system would map each rider’s route, that data was not included in last week’s release. Instead of tracking actual routes, London-based geographer Oliver O’Brien created an estimate by combining Citi Bike ridership data with a map of bike lanes from OpenStreetMap. O’Brien used starting and ending locations for 5.5 million bike-share trips over eight months to map direct routes for each trip, weighting the route choice towards bike lanes and paths.