$sql = "SELECT st.*, t.*, r.*, strftime('%Y%m%d', '22:34:12') as today, strftime('%Y%m%d', '22:34:12', '1 day') as tomorrow, time('22:34:12') as now
  FROM stop_times st
  INNER JOIN trips t
    ON st.trip_id = t.trip_id
  INNER JOIN routes r
    ON t.route_id = r.route_id
  LEFT JOIN calendar c
    ON t.service_id = c.service_id
  LEFT JOIN calendar_dates cd
    ON t.service_id = cd.service_id
  WHERE
    st.stop_id IN (".implode(", ", array_fill(0, count($stops), "?")).") AND
    (
      (
        time(now) < time('23:30:00') AND
        time(st.departure_time) BETWEEN time(now) AND time(now, '30 minutes') AND
        (
          c.service_id IS NULL OR
          (
            c.start_date <= today AND
            c.end_date >= today
          )
        ) AND
        (
          cd.service_id IS NULL OR
          cd.date = today
        )
      ) OR
      (
        time(now) >= time('23:30:00') AND
        (
          (
            time(st.departure_time) >= time(now)  AND
            (
              c.service_id IS NULL OR
              (
                c.start_date <= today AND
                c.end_date >= today
              )
            ) AND
            (
              cd.service_id IS NULL OR
              cd.date = today
            )
          ) OR
          (
            time(st.departure_time) <= time(now, '30 minutes') AND
            (
              c.service_id IS NULL OR
              (
                c.start_date <= tomorrow AND
                c.end_date >= tomorrow
              )
            ) AND
            (
              cd.service_id IS NULL OR
              cd.date = tomorrow
            )
          )
        )
      )
    ) AND
    (
      c.service_id IS NULL OR
      c.$dow = ".(int)Gtfs\Calendar\CalendarDay::AVAILABLE."
    ) AND
    (
      cd.service_id IS NULL OR
      exception_type = ".(int)Gtfs\CalendarDate\ExceptionType::ADDED."
    )
  ORDER BY departure_time ASC";