Timetable Test

Long wait · Chicago · Sat Oct 10

22 min with no Pink Line train

At Pulaski (Pink), toward 54th/Cermak, between 7:53 pm and 8:15 pm. The schedule called for a train every 10 min.

Line
Pink Line
Station
Pulaski (Pink) (station 40150)
Direction
toward 54th/Cermak
Train before
run 313, passed 7:53:39 pm
Train after
run 311, passed 8:15:39 pm
Gap
22 min (1320 s)
Scheduled gap
10 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.

ScheduledSeen3133117:15 pm7:30 pm7:45 pm8:00 pm8:15 pm8:30 pm8:45 pm22 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 313 (before)Run 311 (after)
7:52:09 pmnext stop Central Parknext stop Clinton (Green/Pink)
7:53:09 pmnext stop Pulaski (Pink)next stop Clinton (Green/Pink)
7:54:09 pmnext stop Kostnernext stop Clinton (Green/Pink)
7:55:09 pmnext stop Kostnernext stop Clinton (Green/Pink)
7:56:09 pmnext stop Cicero (Pink)next stop Clinton (Green/Pink)
7:57:09 pmnext stop Cicero (Pink)next stop Morgan (Green/Pink)
7:58:09 pmnext stop 54th/Cermaknext stop Ashland (Green/Pink)
7:59:09 pmnext stop 54th/Cermaknext stop Ashland (Green/Pink)
8:00:09 pmtrip finishednext stop Polk
8:01:09 pmtrip finishednext stop Polk
8:02:09 pmtrip finishednext stop Polk
8:03:09 pmtrip finishednext stop Polk
8:04:09 pmtrip finishednext stop 18th
8:05:09 pmtrip finishednext stop 18th
8:06:09 pmtrip finishednext stop Damen (Pink)
8:07:09 pmtrip finishednext stop Damen (Pink)

Showing 16 of 26 snapshots in the gap. The full record, every train on the line minute by minute, is in 2026-10-10-pink-gap-72939.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.