Timetable Test

Long wait · Chicago · Sat Oct 10

38 min with no Pink Line train

At Pulaski (Pink), toward 54th/Cermak, between 11:27 pm and 12:05 am. The schedule called for a train every 12 min.

Line
Pink Line
Station
Pulaski (Pink) (station 40150)
Direction
toward 54th/Cermak
Train before
run 316, passed 11:27:39 pm
Train after
run 317, passed 12:05:39 am
Gap
38 min (2280 s)
Scheduled gap
12 min
Collector
running the whole time

Scheduled against seen

Each tick is a train at Pulaski (Pink) toward 54th/Cermak. The two runs either side of the gap are labeled.

ScheduledSeen31631711:00 pm11:15 pm11:30 pm11:45 pm12:00 am12:15 am12:30 am12:45 am38 min gap

What Train Tracker said

Train Tracker reports each train's next stop. A train has passed Pulaski (Pink) when its next stop moves past it.

SnapshotRun 316 (before)Run 317 (after)
11:26:09 pmnext stop Central Parknext stop Kostner
11:29:09 pmnext stop Kostnernext stop Central Park
11:32:09 pmnext stop 54th/Cermaknext stop California (Pink)
11:35:09 pmnot in the feednext stop 18th
11:38:09 pmnot in the feednext stop Polk
11:41:09 pmnot in the feednext stop Ashland (Green/Pink)
11:44:09 pmnot in the feednext stop Clinton (Green/Pink)
11:47:09 pmnot in the feednext stop Clinton (Green/Pink)
11:50:09 pmnot in the feednext stop Ashland (Green/Pink)
11:53:09 pmnot in the feednext stop Polk
11:56:09 pmnot in the feednext stop 18th
11:59:09 pmnot in the feednext stop Western (Pink)
12:02:09 amnot in the feednext stop Kedzie (Pink)
12:05:09 amnot in the feednext stop Pulaski (Pink)

Showing 14 of 42 snapshots in the gap. The full record, every train on the line minute by minute, is in 2026-10-10-pink-gap-86739.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.