Morning rush
4.2 min 670 trips · 100% on paceOBSERVED MBTA TRAVEL TIME · 30 SERVICE DAYS
Saint Mary's StreettoCoolidge Corner
Green Line
A direct MBTA train from Saint Mary's Street to Coolidge Corner took a median 4.8 minutes across 3,737 observed trips; 90% of measured rides finished within approximately 6.2 minutes.
Source: MBTA Performance Data · 2026-08-20 to 2026-09-18 · Completed direct trips only
Typical4.8 min50th percentile
Slower trip6.2 min90th percentile
Scheduled6.2 minmedian timetable
On pace100%within 2 min of schedule
THE SHORT ANSWER
How long does Saint Mary's Street to Coolidge Corner take?
The median completed ride from Saint Mary's Street to Coolidge Corner was 4.8 minutes; the published schedule’s median was 6.2 minutes.
Based on 3,737 direct trips between 2026-08-20 and 2026-09-18, the median observed ride was 4.8 minutes. That was within 1.5 minutes of the published schedule.
Nine out of ten measured trips finished within approximately 6.2 minutes. These figures describe completed direct trips; they do not include the time spent waiting for the train.
WHEN YOU TRAVEL
Saint Mary's Street to Coolidge Corner times by daypart
Morning rush produced the fastest median for Saint Mary's Street to Coolidge Corner; Midday produced the slowest.
Differences can change as the rolling dataset updates.
Midday
5.2 min 944 trips · 100% on paceEvening rush
5.2 min 685 trips · 100% on paceOff-peak
4.8 min 1,438 trips · 99% on paceMEASUREMENT SAMPLE
How Saint Mary's Street to Coolidge Corner was measured
The Saint Mary's Street to Coolidge Corner estimate uses 3,737 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 Saint Mary's Street
Trips related to Saint Mary's Street to Coolidge Corner
The Saint Mary's Street to Coolidge Corner record is accompanied by 6 other measured direct rides beginning at Saint Mary's Street, each with a published median duration.