Morning rush
21 min 676 trips · 95% on paceOBSERVED MBTA TRAVEL TIME · 30 SERVICE DAYS
Stony BrooktoAssembly
Orange Line
A direct MBTA train from Stony Brook to Assembly took a median 21 minutes across 2,929 observed trips; 90% of measured rides finished within approximately 24 minutes.
Source: MBTA Performance Data · 2026-08-20 to 2026-09-18 · Completed direct trips only
Typical21 min50th percentile
Slower trip24 min90th percentile
Scheduled23 minmedian timetable
On pace95%within 2 min of schedule
THE SHORT ANSWER
How long does Stony Brook to Assembly take?
The median completed ride from Stony Brook to Assembly was 21 minutes; the published schedule’s median was 23 minutes.
Based on 2,929 direct trips between 2026-08-20 and 2026-09-18, the median observed ride was 21 minutes. That was within 2 minutes of the published schedule.
Nine out of ten measured trips finished within approximately 24 minutes. These figures describe completed direct trips; they do not include the time spent waiting for the train.
WHEN YOU TRAVEL
Stony Brook to Assembly times by daypart
Morning rush produced the fastest median for Stony Brook to Assembly; Evening rush produced the slowest.
Differences can change as the rolling dataset updates.
Midday
22 min 684 trips · 94% on paceEvening rush
22 min 650 trips · 96% on paceOff-peak
21 min 919 trips · 95% on paceMEASUREMENT SAMPLE
How Stony Brook to Assembly was measured
The Stony Brook to Assembly estimate uses 2,929 completed direct-trip stop-timestamp pairs matched to the schedule active for each observed train.
We publish the median because one dramatic delay should not define an everyday journey, and the 90th percentile because riders still need to understand the bad end of normal.
We do not infer why a trip ran slowly. Construction, incidents, crowding and weather require separate evidence.
Read the complete method →MORE FROM Stony Brook
Trips related to Stony Brook to Assembly
The Stony Brook to Assembly record is accompanied by 6 other measured direct rides beginning at Stony Brook, each with a published median duration.