Timetable Test

Long wait · Chicago · Sat Oct 10

26 min with no Red Line train

At Sheridan, toward Howard, between 11:30 pm and 11:56 pm. The schedule called for a train every 8 min.

Line
Red Line
Station
Sheridan (station 40080)
Direction
toward Howard
Train before
run 842, passed 11:30:39 pm
Train after
run 820, passed 11:56:39 pm
Gap
26 min (1560 s)
Scheduled gap
8 min
Collector
running the whole time

Scheduled against seen

Each tick is a train at Sheridan toward Howard. The two runs either side of the gap are labeled.

ScheduledSeen84282011:00 pm11:15 pm11:30 pm11:45 pm12:00 am12:15 am12:30 am26 min gap

What Train Tracker said

Train Tracker reports each train's next stop. A train has passed Sheridan when its next stop moves past it.

SnapshotRun 842 (before)Run 820 (after)
11:29:09 pmnext stop Sheridannext stop Grand (Red)
11:31:09 pmnext stop Wilsonnext stop Grand (Red)
11:33:09 pmnext stop Wilsonnext stop Clark/Division
11:35:09 pmnext stop Lawrencenext stop Clark/Division
11:37:09 pmnext stop Berwynnext stop North/Clybourn
11:39:09 pmnext stop Thorndalenext stop Fullerton
11:41:09 pmnext stop Granvillenext stop Fullerton
11:43:09 pmnext stop Morsenext stop Belmont (Red/Brown/Purple)
11:45:09 pmnext stop Howardnext stop Addison (Red)
11:47:09 pmnext stop Howardnext stop Addison (Red)
11:49:09 pmtrip finishednext stop Addison (Red) · flagged delayed
11:51:09 pmtrip finishednext stop Addison (Red) · flagged delayed
11:53:09 pmtrip finishednext stop Addison (Red)
11:55:09 pmtrip finishednext stop Sheridan
11:57:09 pmtrip finishednext stop Wilson

Showing 15 of 30 snapshots in the gap. The full record, every train on the line minute by minute, is in 2026-10-10-red-gap-86199.json.

Check it yourself

Scheduled times come from CTA's GTFS schedule for Sat Oct 10. Positions come from Train Tracker, polled once a minute. The raw records above are exactly what CTA's servers returned. How the numbers are worked out.