Morning rush
12 min 655 trips · 69% on paceOBSERVED MBTA TRAVEL TIME · 30 SERVICE DAYS
South StreettoGriggs Street
Green Line
A direct MBTA train from South Street to Griggs Street took a median 12 minutes across 3,304 observed trips; 90% of measured rides finished within approximately 14 minutes.
Source: MBTA Performance Data · 2026-08-20 to 2026-09-18 · Completed direct trips only
Typical12 min50th percentile
Slower trip14 min90th percentile
Scheduled11 minmedian timetable
On pace77%within 2 min of schedule
THE SHORT ANSWER
How long does South Street to Griggs Street take?
The median completed ride from South Street to Griggs Street was 12 minutes; the published schedule’s median was 11 minutes.
Based on 3,304 direct trips between 2026-08-20 and 2026-09-18, the median observed ride was 12 minutes. That was 0.5 minutes longer than the published schedule.
Nine out of ten measured trips finished within approximately 14 minutes. These figures describe completed direct trips; they do not include the time spent waiting for the train.
WHEN YOU TRAVEL
South Street to Griggs Street times by daypart
Off-peak produced the fastest median for South Street to Griggs Street; Morning rush produced the slowest.
Differences can change as the rolling dataset updates.
Midday
12 min 911 trips · 79% on paceEvening rush
12 min 637 trips · 90% on paceOff-peak
11 min 1,101 trips · 74% on paceMEASUREMENT SAMPLE
How South Street to Griggs Street was measured
The South Street to Griggs Street estimate uses 3,304 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 Griggs Street
The South Street to Griggs Street record is accompanied by 6 other measured direct rides beginning at South Street, each with a published median duration.