Timetable Test

Long wait · New York · Sat Oct 10

41 min with no F train

At 4 Av-9 St, toward Jamaica-179 St, between 12:49 am and 1:30 am. The schedule called for a train every 20 min.

Line
F train
Station
4 Av-9 St (station F23)
Direction
toward Jamaica-179 St
Train before
train 1F 2352+ STL/179, passed 12:49:39 am
Train after
train 1F 0101+ STL/179, passed 1:30:39 am
Gap
41 min (2460 s)
Scheduled gap
20 min
Collector
running the whole time

Scheduled against seen

Each tick is a train at 4 Av-9 St toward Jamaica-179 St. The two trains either side of the gap are labeled.

ScheduledSeen1F 2352+ S1F 0101+ S12:15 am12:30 am12:45 am1:00 am1:15 am1:30 am1:45 am2:00 am41 min gap

What the MTA feed said

The MTA feed reports each train's next stop. A train has passed 4 Av-9 St when its next stop moves past it.

SnapshotTrain 1F 2352+ STL/179 (before)Train 1F 0101+ STL/179 (after)
12:48:09 amnext stop 4 Av-9 Stnot in service yet
12:51:09 amnext stop Smith-9 Stsnot in service yet
12:54:09 amnext stop Carroll Stnot in service yet
12:57:09 amnext stop Carroll Stnot in service yet
1:00:09 amnext stop Carroll Stnot in service yet
1:03:09 amnext stop Carroll Stnext stop W 8 St-NY Aquarium
1:06:09 amnext stop Carroll Stnext stop Avenue X
1:09:09 amnext stop Carroll Stnext stop Kings Hwy
1:12:09 amnext stop Carroll Stnext stop Avenue N
1:15:09 amnext stop Bergen Stnext stop Avenue I
1:18:09 amnext stop Jay St-MetroTechnext stop Ditmas Av
1:21:09 amnext stop York Stnext stop Fort Hamilton Pkwy
1:24:09 amnext stop Delancey St-Essex Stnext stop 15 St-Prospect Park
1:27:09 amnext stop 2 Avnext stop 7 Av
1:30:09 amnext stop Broadway-Lafayette Stnext stop 4 Av-9 St

Showing 15 of 45 snapshots in the gap. The full record, every train on the line minute by minute, is in 2026-10-10-f-gap-91839.json.

Check it yourself

Scheduled times come from the MTA's supplemented GTFS schedule for Sat Oct 10. Positions come from the MTA feed, polled once a minute. The raw records above are exactly what MTA's servers returned. How the numbers are worked out.