Timetable Test

Long wait · Chicago · Sat Oct 10

33 min with no Green Line train

At Ridgeland, toward Harlem/Lake, between 1:22 am and 1:55 am. The schedule called for a train every 12 min.

Line
Green Line
Station
Ridgeland (station 40610)
Direction
toward Harlem/Lake
Train before
run 017, passed 1:22:39 am
Train after
run 020, passed 1:55:39 am
Gap
33 min (1980 s)
Scheduled gap
12 min
Collector
running the whole time

Scheduled against seen

Each tick is a train at Ridgeland toward Harlem/Lake. The two runs either side of the gap are labeled.

ScheduledSeen01702012:45 am1:00 am1:15 am1:30 am1:45 am2:00 am2:15 am2:30 am33 min gap

What Train Tracker said

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

SnapshotRun 017 (before)Run 020 (after)
1:21:09 amnext stop Ridgelandnext stop Roosevelt
1:23:09 amnext stop Oak Park (Green)next stop Adams/Wabash
1:25:09 amtrip finishednext stop Washington/Wabash
1:27:09 amtrip finishednext stop Clark/Lake
1:29:09 amtrip finishednext stop Clark/Lake
1:31:09 amtrip finishednext stop Clark/Lake
1:33:09 amtrip finishednext stop Clinton (Green/Pink)
1:35:09 amtrip finishednext stop Morgan (Green/Pink)
1:37:09 amtrip finishednext stop Ashland (Green/Pink)
1:39:09 amtrip finishednext stop California (Green)
1:41:09 amtrip finishednext stop California (Green)
1:43:09 amtrip finishednext stop Pulaski (Green)
1:45:09 amtrip finishednext stop Pulaski (Green)
1:47:09 amtrip finishednext stop Cicero (Green)
1:49:09 amtrip finishednext stop Laramie
1:51:09 amtrip finishednext stop Central (Green)

Showing 16 of 37 snapshots in the gap. The full record, every train on the line minute by minute, is in 2026-10-10-green-gap-93339.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.