Morning rush
8.2 min 727 trips · 94% on paceOBSERVED MBTA TRAVEL TIME · 30 SERVICE DAYS
Summit AvenuetoSaint Mary's Street
Green Line
A direct MBTA train from Summit Avenue to Saint Mary's Street took a median 8.2 minutes across 3,640 observed trips; 90% of measured rides finished within approximately 11 minutes.
Source: MBTA Performance Data · 2026-08-20 to 2026-09-18 · Completed direct trips only
Typical8.2 min50th percentile
Slower trip11 min90th percentile
Scheduled8.2 minmedian timetable
On pace90%within 2 min of schedule
THE SHORT ANSWER
How long does Summit Avenue to Saint Mary's Street take?
The median completed ride from Summit Avenue to Saint Mary's Street was 8.2 minutes; the published schedule’s median was 8.2 minutes.
Based on 3,640 direct trips between 2026-08-20 and 2026-09-18, the median observed ride was 8.2 minutes. That was within 0 minutes of the published schedule.
Nine out of ten measured trips finished within approximately 11 minutes. These figures describe completed direct trips; they do not include the time spent waiting for the train.
WHEN YOU TRAVEL
Summit Avenue to Saint Mary's Street times by daypart
Off-peak produced the fastest median for Summit Avenue to Saint Mary's Street; Morning rush produced the slowest.
Differences can change as the rolling dataset updates.
Midday
8.2 min 981 trips · 91% on paceEvening rush
8.2 min 751 trips · 92% on paceOff-peak
7.8 min 1,181 trips · 87% on paceMEASUREMENT SAMPLE
How Summit Avenue to Saint Mary's Street was measured
The Summit Avenue to Saint Mary's Street estimate uses 3,640 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 Summit Avenue
Trips related to Summit Avenue to Saint Mary's Street
The Summit Avenue to Saint Mary's Street record is accompanied by 6 other measured direct rides beginning at Summit Avenue, each with a published median duration.