code: def arrivalboard(self, stop_id, date=None, direction=None):
          
          date = date if date else datetime.now()
          request_parameters = {
              'id': stop_id,
              'date': date.strftime(DATE_FORMAT),
              'time': date.strftime(TIME_FORMAT)
          }
          if direction:
              request_parameters['directiona'] = direction
          response = self._request(
              'arrivalBoard',
              **request_parameters)
          return _get_node(response, 'ArrivalBoard', 'Arrival')
docs: arrivalBoard