Citi Bike, New York's popular bike share program with over 20,000 bikes across Manhattan, Brooklyn, Queens, and the Bronx, has a new app that allows users to discover how many bikes are used at different times throughout each day in various neighborhoods. The app uses RedisGraph for lightning-fast queries, enabling users to visualize traffic patterns around the network. Users can drag a geospatial index across different locations to uncover precise figures on Citi Bike usage over time. This application is built using React and around react-mapbox-gl, with an aggregated trip graph constructed using devexpress/dx-react-chart. The offline importer downloads public Citi Bike trip data, unzips each archive, and indexes all of the trips into a journeys graph.