Port Jefferson Branch
Long Island Rail Road · real-time data health
Current real-time data status
OperationalReal-time arrival information is current and updating normally.
Updating now
Last checked recently (Aug 11, 2026, 1:48:01 PM ET)
Commuter rail service operates on a timetable, so longer gaps between trains can be normal and do not necessarily indicate a real-time data problem.
Arrival predictions being published
167
Upcoming stop arrival times currently in the feed.
Stations with upcoming arrivals
26
How widely predictions cover the branch.
Trains being tracked
17
Trains the feed is currently reporting on.
Arrival data last changed
59s
The main signal we use: predictions should keep moving.
Last 24 hours
Each block is 30 minutes, oldest on the left. Gaps mean we had no monitoring results for that period.
Recent data incidents
No data incidents recorded here in the last 48 hours.
MTA service information
No active service alert detected
Shown for context only. Service alerts describe how trains are running; they never change the data-health status above.