Long wait · Chicago · Sat Oct 10
13 min with no Purple Line train
At Central (Purple), toward Howard, between 7:20 pm and 7:33 pm. The schedule called for a train every 6 min.
- Line
- Purple Line
- Station
- Central (Purple) (station 41250)
- Direction
- toward Howard
- Train before
- run 510, passed 7:20:24 pm
- Train after
- run 509, passed 7:33:39 pm
- Gap
- 13 min (795 s)
- Scheduled gap
- 6 min
- Collector
- running the whole time
Scheduled against seen
Each tick is a train at Central (Purple) toward Howard. The two runs either side of the gap are labeled.
What Train Tracker said
Train Tracker reports each train's next stop. A train has passed Central (Purple) when its next stop moves past it.
| Snapshot | Run 510 (before) | Run 509 (after) |
|---|---|---|
| 7:19:09 pm | not in service yet | not in the feed |
| 7:20:09 pm | not in service yet | not in the feed |
| 7:21:09 pm | next stop Noyes | not in the feed |
| 7:22:09 pm | next stop Noyes | not in the feed |
| 7:23:09 pm | next stop Foster | not in the feed |
| 7:24:09 pm | next stop Davis | not in the feed |
| 7:25:09 pm | next stop Dempster | not in the feed |
| 7:26:09 pm | next stop Dempster | not in the feed |
| 7:27:09 pm | next stop Main | not in the feed |
| 7:28:09 pm | next stop South Boulevard | not in the feed |
| 7:29:09 pm | next stop South Boulevard | not in the feed |
| 7:30:09 pm | next stop Howard | not in the feed |
| 7:31:09 pm | not in the feed | not in the feed |
| 7:32:09 pm | not in the feed | not in the feed |
| 7:33:09 pm | not in the feed | next stop Central (Purple) |
| 7:34:09 pm | not in the feed | next stop Noyes |
Showing 16 of 17 snapshots in the gap. The full record, every train on the line minute by minute, is in 2026-10-10-purple-gap-70419.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.