Timetable Test

Bunched trains · Chicago · Sat Oct 10

Two Pink Line trains in the same minute

At Kostner, toward Washington/Wells, between 11:44 pm and 11:45 pm. The schedule called for a train every 15 min.

Line
Pink Line
Station
Kostner (station 40600)
Direction
toward Washington/Wells
Train before
run 314, passed 11:44:39 pm
Train after
run 318, passed 11:45:24 pm
Gap
1 min (45 s)
Scheduled gap
15 min
Collector
running the whole time

Scheduled against seen

Each tick is a train at Kostner toward Washington/Wells. The two runs either side of the bunch are labeled.

ScheduledSeen31431811:15 pm11:30 pm11:45 pm12:00 am12:15 am1 min gap

What Train Tracker said

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

SnapshotRun 314 (before)Run 318 (after)
11:43:09 pmnext stop Kostnernot in service yet
11:44:09 pmnext stop Kostnernot in service yet
11:45:09 pmnext stop Clinton (Green/Pink)not in service yet
11:46:09 pmnext stop Clark/Lakenext stop Pulaski (Pink)
11:47:09 pmnext stop Clark/Lakenext stop Central Park

Showing 5 of 5 snapshots in the gap. The full record, every train on the line minute by minute, is in 2026-10-10-pink-bunch-85524.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.