At Addison (Brown), toward Kimball, between 12:09 am and 12:10 am. The schedule called for a train every 15 min.
Line
Brown Line
Station
Addison (Brown) (station 41440)
Direction
toward Kimball
Train before
run 425, passed 12:09:39 am
Train after
run 426, passed 12:10:39 am
Gap
1 min (60 s)
Scheduled gap
15 min
Collector
running the whole time
Scheduled against seen
Each tick is a train at Addison (Brown) 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 Addison (Brown) when its next stop moves past it.
Snapshot
Run 425 (before)
Run 426 (after)
12:08:09 am
next stop Addison (Brown)
next stop Southport
12:09:09 am
next stop Addison (Brown)
next stop Paulina
12:10:09 am
next stop Irving Park (Brown)
next stop Addison (Brown)
12:11:09 am
next stop Montrose (Brown)
next stop Irving Park (Brown)
12:12:09 am
next stop Montrose (Brown)
next stop Irving Park (Brown)
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-87039.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.