GTFS-RT Trip updates
De Lijn: bus and tram operator in flanders, with lines into brussels
- Format
- GTFS-RT
- Updates
- Every 20 seconds
- Latest snapshot
- Snapshots stored
- about 834,832
curl -H "Authorization: Bearer $MOBILITYTWIN_TOKEN" -o gtfs-rt-trip-update.pb "https://api.mobilitytwin.brussels/de-lijn/gtfs-rt-trip-update"Delays and cancellations of De Lijn trips.
A binary GTFS Realtime message (Protocol Buffers). Decode it with gtfs-realtime-bindings.
Which days have data
Data from 30 Mar 2026 to 2 Nov 2026, on 218 days. 30 of the last 30 days have data. A typical day holds 3799 snapshots. Days are in UTC.
2026
JanFebMarAprMayJunJulAugSepOctNovDec
- Full day
- Partial, 50–90% of a typical day
- Low, under 50%
- No snapshot
- Not expected
Click a day above, or pick a date, to get its requests.
Parameters
| Name | Meaning |
|---|---|
timestamp | Return the last snapshot at or before this moment, in Unix seconds or ISO 8601 (e.g. 2026-05-06T12:00:00Z). Without it, the latest snapshot is returned. |
Python example
import requests
from google.transit import gtfs_realtime_pb2
from datetime import datetime, timedelta, timezone
yesterday_noon = (datetime.now(timezone.utc) - timedelta(days=1)).replace(
hour=12, minute=0, second=0, microsecond=0
)
params = {
"timestamp": yesterday_noon.isoformat(), # ISO accepted; epoch also works
}
url = "https://api.mobilitytwin.brussels/de-lijn/gtfs-rt-trip-update"
data = requests.get(url, headers={
'Authorization': 'Bearer [MY_API_KEY]'
}, params=params).content
feed = gtfs_realtime_pb2.FeedMessage()
feed.ParseFromString(data)
# Show delayed trips (delay > 5 minutes)
for entity in feed.entity:
tu = entity.trip_update
for stu in tu.stop_time_update:
delay = stu.arrival.delay if stu.HasField('arrival') else 0
if delay > 300:
print(f"Trip {tu.trip.trip_id} — {delay // 60}min late at stop {stu.stop_id}")