Morning rush
36 min 640 trips · 86% on paceOBSERVED MBTA TRAVEL TIME · 30 SERVICE DAYS
BoylstontoSouth Street
Green Line
A direct MBTA train from Boylston to South Street took a median 39 minutes across 3,341 observed trips; 90% of measured rides finished within approximately 44 minutes.
Source: MBTA Performance Data · 2026-08-20 to 2026-09-18 · Completed direct trips only
Typical39 min50th percentile
Slower trip44 min90th percentile
Scheduled40 minmedian timetable
On pace80%within 2 min of schedule
THE SHORT ANSWER
How long does Boylston to South Street take?
The median completed ride from Boylston to South Street was 39 minutes; the published schedule’s median was 40 minutes.
Based on 3,341 direct trips between 2026-08-20 and 2026-09-18, the median observed ride was 39 minutes. That was within 1.5 minutes of the published schedule.
Nine out of ten measured trips finished within approximately 44 minutes. These figures describe completed direct trips; they do not include the time spent waiting for the train.
WHEN YOU TRAVEL
Boylston to South Street times by daypart
Morning rush produced the fastest median for Boylston to South Street; Evening rush produced the slowest.
Differences can change as the rolling dataset updates.
Midday
39 min 889 trips · 79% on paceEvening rush
41 min 628 trips · 77% on paceOff-peak
38 min 1,184 trips · 80% on paceMEASUREMENT SAMPLE
How Boylston to South Street was measured
The Boylston to South Street estimate uses 3,341 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 Boylston
Trips related to Boylston to South Street
The Boylston to South Street record is accompanied by 6 other measured direct rides beginning at Boylston, each with a published median duration.