Timetable Test

Long wait · Chicago · Sat Oct 10

24 min with no Brown Line train

At Washington/Wells, toward Clark/Lake, between 11:09 pm and 11:33 pm. The schedule called for a train every 10 min.

Line
Brown Line
Station
Washington/Wells (station 40730)
Direction
toward Clark/Lake
Train before
run 424, passed 11:09:39 pm
Train after
run 425, passed 11:33:39 pm
Gap
24 min (1440 s)
Scheduled gap
10 min
Collector
running the whole time

Scheduled against seen

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

ScheduledSeen42442510:30 pm10:45 pm11:00 pm11:15 pm11:30 pm11:45 pm12:00 am24 min gap

What Train Tracker said

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

SnapshotRun 424 (before)Run 425 (after)
11:08:09 pmnext stop Merchandise Mart (Brown/Purple)next stop Belmont (Red/Brown/Purple)
11:10:09 pmnext stop Quincynext stop Diversey (Brown/Purple)
11:12:09 pmnext stop LaSalle/Van Burennext stop Fullerton
11:14:09 pmnext stop Adams/Wabashnext stop Armitage (Brown/Purple)
11:16:09 pmnext stop Washington/Wabashnext stop Sedgwick (Brown/Purple)
11:18:09 pmnext stop Clark/Lakenext stop Sedgwick (Brown/Purple)
11:20:09 pmnext stop Merchandise Mart (Brown/Purple)next stop Chicago (Brown/Purple)
11:22:09 pmnext stop Chicago (Brown/Purple)next stop Chicago (Brown/Purple)
11:24:09 pmnext stop Sedgwick (Brown/Purple)next stop Chicago (Brown/Purple) · flagged delayed
11:26:09 pmnext stop Sedgwick (Brown/Purple)next stop Chicago (Brown/Purple)
11:28:09 pmnext stop Sedgwick (Brown/Purple)next stop Chicago (Brown/Purple)
11:30:09 pmnext stop Armitage (Brown/Purple)next stop Merchandise Mart (Brown/Purple)
11:32:09 pmnext stop Armitage (Brown/Purple)next stop Washington/Wells
11:34:09 pmnext stop Fullertonnext stop Quincy

Showing 14 of 28 snapshots in the gap. The full record, every train on the line minute by minute, is in 2026-10-10-brown-gap-84819.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.