Morning rush
34 min 641 trips · 89% on paceOBSERVED MBTA TRAVEL TIME · 30 SERVICE DAYS
ArlingtontoSouth Street
Green Line
A direct MBTA train from Arlington to South Street took a median 36 minutes across 3,336 observed trips; 90% of measured rides finished within approximately 41 minutes.
Source: MBTA Performance Data · 2026-08-20 to 2026-09-18 · Completed direct trips only
Typical36 min50th percentile
Slower trip41 min90th percentile
Scheduled38 minmedian timetable
On pace81%within 2 min of schedule
THE SHORT ANSWER
How long does Arlington to South Street take?
The median completed ride from Arlington to South Street was 36 minutes; the published schedule’s median was 38 minutes.
Based on 3,336 direct trips between 2026-08-20 and 2026-09-18, the median observed ride was 36 minutes. That was within 2 minutes of the published schedule.
Nine out of ten measured trips finished within approximately 41 minutes. These figures describe completed direct trips; they do not include the time spent waiting for the train.
WHEN YOU TRAVEL
Arlington to South Street times by daypart
Morning rush produced the fastest median for Arlington to South Street; Evening rush produced the slowest.
Differences can change as the rolling dataset updates.
Midday
37 min 903 trips · 81% on paceEvening rush
38 min 608 trips · 75% on paceOff-peak
36 min 1,184 trips · 80% on paceMEASUREMENT SAMPLE
How Arlington to South Street was measured
The Arlington to South Street estimate uses 3,336 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 Arlington
Trips related to Arlington to South Street
The Arlington to South Street record is accompanied by 6 other measured direct rides beginning at Arlington, each with a published median duration.