At Wellington (Brown/Purple), toward Kimball, between 10:51 pm and 10:52 pm. The schedule called for a train every 10 min.
Line
Brown Line
Station
Wellington (Brown/Purple) (station 41210)
Direction
toward Kimball
Train before
run 428, passed 10:51:39 pm
Train after
run 424, passed 10:52:39 pm
Gap
1 min (60 s)
Scheduled gap
10 min
Collector
running the whole time
Scheduled against seen
Each tick is a train at Wellington (Brown/Purple) toward Kimball. The two runs either side of the bunch are labeled.
What Train Tracker said
Train Tracker reports each train's next stop. A train has passed Wellington (Brown/Purple) when its next stop moves past it.
Snapshot
Run 428 (before)
Run 424 (after)
10:50:09 pm
next stop Diversey (Brown/Purple)
next stop Southport
10:51:09 pm
next stop Wellington (Brown/Purple)
next stop Southport
10:52:09 pm
next stop Belmont (Red/Brown/Purple)
next stop Wellington (Brown/Purple)
10:53:09 pm
next stop Southport
next stop Belmont (Red/Brown/Purple)
10:54:09 pm
next stop Southport
next stop Wellington (Brown/Purple)
Showing 5 of 5 snapshots in the gap. The full record, every train on the line minute by minute, is in 2026-10-10-brown-bunch-82359.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.