Morning rush
15 min 699 trips · 92% on paceOBSERVED MBTA TRAVEL TIME · 30 SERVICE DAYS
Saint Mary's StreettoPark Street
Green Line
A direct MBTA train from Saint Mary's Street to Park Street took a median 15 minutes across 3,534 observed trips; 90% of measured rides finished within approximately 19 minutes.
Source: MBTA Performance Data · 2026-08-20 to 2026-09-18 · Completed direct trips only
Typical15 min50th percentile
Slower trip19 min90th percentile
Scheduled17 minmedian timetable
On pace87%within 2 min of schedule
THE SHORT ANSWER
How long does Saint Mary's Street to Park Street take?
The median completed ride from Saint Mary's Street to Park Street was 15 minutes; the published schedule’s median was 17 minutes.
Based on 3,534 direct trips between 2026-08-20 and 2026-09-18, the median observed ride was 15 minutes. That was within 2 minutes of the published schedule.
Nine out of ten measured trips finished within approximately 19 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 Park Street times by daypart
Morning rush produced the fastest median for Saint Mary's Street to Park Street; Evening rush produced the slowest.
Differences can change as the rolling dataset updates.
Midday
16 min 950 trips · 88% on paceEvening rush
16 min 736 trips · 82% on paceOff-peak
15 min 1,149 trips · 87% on paceMEASUREMENT SAMPLE
How Saint Mary's Street to Park Street was measured
The Saint Mary's Street to Park Street estimate uses 3,534 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 Park Street
The Saint Mary's Street to Park Street record is accompanied by 6 other measured direct rides beginning at Saint Mary's Street, each with a published median duration.