Morning rush
37 min 652 trips · 66% on paceOBSERVED MBTA TRAVEL TIME · 30 SERVICE DAYS
South StreettoArlington
Green Line
A direct MBTA train from South Street to Arlington took a median 38 minutes across 3,243 observed trips; 90% of measured rides finished within approximately 43 minutes.
Source: MBTA Performance Data · 2026-08-20 to 2026-09-18 · Completed direct trips only
Typical38 min50th percentile
Slower trip43 min90th percentile
Scheduled37 minmedian timetable
On pace62%within 2 min of schedule
THE SHORT ANSWER
How long does South Street to Arlington take?
The median completed ride from South Street to Arlington was 38 minutes; the published schedule’s median was 37 minutes.
Based on 3,243 direct trips between 2026-08-20 and 2026-09-18, the median observed ride was 38 minutes. That was 0.5 minutes longer than the published schedule.
Nine out of ten measured trips finished within approximately 43 minutes. These figures describe completed direct trips; they do not include the time spent waiting for the train.
WHEN YOU TRAVEL
South Street to Arlington times by daypart
Off-peak produced the fastest median for South Street to Arlington; Evening rush produced the slowest.
Differences can change as the rolling dataset updates.
Midday
38 min 891 trips · 64% on paceEvening rush
39 min 629 trips · 63% on paceOff-peak
36 min 1,071 trips · 58% on paceMEASUREMENT SAMPLE
How South Street to Arlington was measured
The South Street to Arlington estimate uses 3,243 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 Arlington
The South Street to Arlington record is accompanied by 6 other measured direct rides beginning at South Street, each with a published median duration.