Convert general transit feed specification (GTFS) data to global positioning system (GPS) records in 'data.table' format. It also has some functions to subset GTFS data in time and space and to convert both representations to simple feature format.

Tools for the development of packages related to General
    Transit Feed Specification (GTFS) files. Establishes a standard for
    representing GTFS feeds using R data types. Provides fast and flexible
    functions to read and write GTFS feeds while sticking to this
    standard. Defines a basic 'gtfs' class which is meant to be extended
    by packages that depend on it. And offers utility functions that
    support checking the structure of GTFS objects.

GTFS-realtime is a format transit agencies use to provide current vehicle positions, predicted
    arrival times, and service alerts. This package provides efficient functions to read this format into
    data frames. It can be used to retrieve current data or to process archived data.

Use 'GTFS' (General Transit Feed Specification) data for routing
    from nominated start and end stations, for extracting 'isochrones', and
    travel times from any nominated start station to all other stations.

Utility functions to read, manipulate, analyse and write
    transit feeds in the General Transit Feed Specification (GTFS) data
    format.

Creating, exploring, analyzing, and manipulating General Transit
    Feed Specification (GTFS) files, which represent public transportation
    schedules and geographic data. The package allows users to filter data by
    routes, trips, stops, service dates, and time, generate spatial
    visualizations, and perform detailed analyses of transit networks,
    including headway, dwell times, route frequencies, service span, scheduled
    vehicle-hours, and trip duration. Methods follow common public transport
    planning and operation concepts described in Ceder (2007,
    ISBN:978-0-7506-6166-6), Vuchic (2005, ISBN:978-0-471-63265-8), and Vuchic
    (2007, ISBN:978-0-471-75823-5).