captran

Captran is a transportation API wrapper and bundler for the Washington, D.C., metropolitan area. Extra features include call throttling/scheduling to avoid 429'ing (when needed) and caching for performance.

The captran-wmata module is a thin wrapper for the the Washington Metropolitan Area Transit Authority (WMATA) API. Refer to WMATA's documentation and pass any required or optional parameters as an object, but indicate the API endpoint with a keyword as an api property.

const Wmata = require('./captran-wmata')
let wmata = new Wmata()

wmata.query({ // returns a promise
  api: 'busPositions'
}).then(console.log)

// error-first callbacks, if supplied, work just as well
wmata.query({ api: 'busPositions' }, (error, doc) => console.log(error || doc))

...fetches for you all the JSON with which you may do as you please.

{
  "BusPositions":[  
    {  
      "VehicleID":"7077",
      "Lat":38.955383,
      "Lon":-76.744362,
      "Deviation":-1,
      "DateTime":"2016-06-29T18:07:07",
      "TripID":"8860264",
      "RouteID":"B24",
      "...":"etc",
    },{
      "all the other buses":"and their deets"
    }
  ]
}

For real-time position information for buses in Maryland's Montgomery County, the captran-rideon module can be used in much the same way:

const RideOn = require('./captran-rideon')
let rideon = new RideOn({ apiKey: 'auth_token_goes_here' })

rideon.query({ // returns a promise
  api: 'busPositions'
}).then(console.log)

Use the captran-gbfs module as a wrapper for General Bikeshare Feed Specification, such as that used by Capital Bikeshare (a bicycle sharing network in the Washington, D.C., area):

const Gbfs = require('./captran-gbfs')
let cabi = new Gbfs({
  gbfsUrl: 'https://gbfs.capitalbikeshare.com/gbfs/gbfs.json'
})

cabi.getStationsNear(38.8977, -77.0365, 0.3).then(console.log, console.error)

...should print real-time Cabi station data near the White House:

{
  "last_updated":1481408837,
  "ttl":10,
  "data":[
    {
      "station_id":"83",
      "name":"New York Ave & 15th St NW",
      "short_name":"31222",
      "lat":38.8991,
      "lon":-77.0337,
      "rental_methods":[
        "KEY",
        "CREDITCARD"
      ],
      "capacity":19,
      "eightd_has_key_dispenser":false,
      "num_bikes_available":12,
      "num_bikes_disabled":2,
      "num_docks_available":5,
      "num_docks_disabled":0,
      "is_installed":1,
      "is_renting":1,
      "is_returning":1,
      "last_reported":1481408764,
      "eightd_has_available_keys":false
    },
    {
      "station_id":"349",
      "name":"17th & G St NW",
      "short_name":"31277",
      "lat":38.89841,
      "lon":-77.039624,
      "rental_methods":[
        "KEY",
        "CREDITCARD"
      ],
      "capacity":31,
      "eightd_has_key_dispenser":false,
      "num_bikes_available":3,
      "num_bikes_disabled":2,
      "num_docks_available":26,
      "num_docks_disabled":0,
      "is_installed":1,
      "is_renting":1,
      "is_returning":1,
      "last_reported":1481408820,
      "eightd_has_available_keys":false
    }
  ]
}