Morning rush
13 min 779 trips · 97% on paceOBSERVED MBTA TRAVEL TIME · 30 SERVICE DAYS
AssemblytoBack Bay
Orange Line
A direct MBTA train from Assembly to Back Bay took a median 13 minutes across 3,500 observed trips; 90% of measured rides finished within approximately 15 minutes.
Source: MBTA Performance Data · 2026-08-20 to 2026-09-18 · Completed direct trips only
Typical13 min50th percentile
Slower trip15 min90th percentile
Scheduled14 minmedian timetable
On pace95%within 2 min of schedule
THE SHORT ANSWER
How long does Assembly to Back Bay take?
The median completed ride from Assembly to Back Bay was 13 minutes; the published schedule’s median was 14 minutes.
Based on 3,500 direct trips between 2026-08-20 and 2026-09-18, the median observed ride was 13 minutes. That was within 1 minutes of the published schedule.
Nine out of ten measured trips finished within approximately 15 minutes. These figures describe completed direct trips; they do not include the time spent waiting for the train.
WHEN YOU TRAVEL
Assembly to Back Bay times by daypart
Evening rush produced the fastest median for Assembly to Back Bay; Off-peak produced the slowest.
Differences can change as the rolling dataset updates.
Midday
13 min 669 trips · 96% on paceEvening rush
13 min 719 trips · 93% on paceOff-peak
13 min 1,333 trips · 95% on paceMEASUREMENT SAMPLE
How Assembly to Back Bay was measured
The Assembly to Back Bay estimate uses 3,500 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 Assembly
Trips related to Assembly to Back Bay
The Assembly to Back Bay record is accompanied by 6 other measured direct rides beginning at Assembly, each with a published median duration.