Data

Citibike data is publicly available online and contains comprehensive ride records for periods of one month for the time range of July 2013 through the latest month \cite{nyc}. I used the July 2017 Citibike data set, consisting of 1,735,599 rides. A ride record consists of the the following fields: trip duration, start time, stop start, start station ID, start station name, start station latitude, start station longitude, end station ID, end station name, end station latitude, end station longitude, bike ID, user type, user birth year, and user gender.