code: function getTripByShortName(db, shortName, date, callback) {
  
    // Check Cache for Trip
    let cacheKey = db.id + "-" + shortName + "-" + date;
    let cache = cache_tripsByShortName.get(cacheKey);
    if ( cache !== null ) {
      return callback(null, cache);
    }
  
    // Get effective service ids
    _buildEffectiveServiceIDString(db, date, function(err, serviceIdString) {
      if ( err ) {
        return callback(err);
      }
  
      // Get Trip ID
      let select = "SELECT trip_id FROM gtfs_trips WHERE trip_short_name = '" +
        shortName + "' AND service_id IN " + serviceIdString + ";";
  
      // Query database
      db.get(select, function(err, result) {
        if ( err ) {
          return callback(err);
        }
  
        // No Trip Found
        if ( result === undefined ) {
          return callback(null, undefined);
        }
  
        // Get the Trip
        getTrip(db, result.trip_id, date, function(err, trip) {
  
          // Add Trip to Cache
          cache_tripsByShortName.put(cacheKey, trip);
  
          // Return Trip
          return callback(err, trip);
  
        });
  
      });
  
    });
  
  }
docs: Get the Trip specified by the Trip short name that operates on the specified date
  @param {RightTrackDB} db The Right Track DB to query
  @param {string} shortName Trip short name
  @param {int} date Date Integer (yyyymmdd)
  @param {function} callback Callback function
  @param {Error} callback.error Database Query Error
  @param {Trip} [callback.trip] The selected Trip