Morning rush
40 min 648 trips · 69% on paceOBSERVED MBTA TRAVEL TIME · 30 SERVICE DAYS
South StreettoBoylston
Green Line
A direct MBTA train from South Street to Boylston took a median 40 minutes across 3,231 observed trips; 90% of measured rides finished within approximately 47 minutes.
Source: MBTA Performance Data · 2026-08-20 to 2026-09-18 · Completed direct trips only
Typical40 min50th percentile
Slower trip47 min90th percentile
Scheduled40 minmedian timetable
On pace63%within 2 min of schedule
THE SHORT ANSWER
How long does South Street to Boylston take?
The median completed ride from South Street to Boylston was 40 minutes; the published schedule’s median was 40 minutes.
Based on 3,231 direct trips between 2026-08-20 and 2026-09-18, the median observed ride was 40 minutes. That was within 0 minutes of the published schedule.
Nine out of ten measured trips finished within approximately 47 minutes. These figures describe completed direct trips; they do not include the time spent waiting for the train.
WHEN YOU TRAVEL
South Street to Boylston times by daypart
Off-peak produced the fastest median for South Street to Boylston; Evening rush produced the slowest.
Differences can change as the rolling dataset updates.
Midday
41 min 894 trips · 65% on paceEvening rush
42 min 630 trips · 62% on paceOff-peak
39 min 1,059 trips · 58% on paceMEASUREMENT SAMPLE
How South Street to Boylston was measured
The South Street to Boylston estimate uses 3,231 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 South Street
Trips related to South Street to Boylston
The South Street to Boylston record is accompanied by 6 other measured direct rides beginning at South Street, each with a published median duration.