Morning rush
17 min 558 trips · 85% on paceOBSERVED MBTA TRAVEL TIME · 30 SERVICE DAYS
Union SquaretoPark Street
Green Line
A direct MBTA train from Union Square to Park Street took a median 17 minutes across 3,161 observed trips; 90% of measured rides finished within approximately 21 minutes.
Source: MBTA Performance Data · 2026-08-20 to 2026-09-18 · Completed direct trips only
Typical17 min50th percentile
Slower trip21 min90th percentile
Scheduled18 minmedian timetable
On pace83%within 2 min of schedule
THE SHORT ANSWER
How long does Union Square to Park Street take?
The median completed ride from Union Square to Park Street was 17 minutes; the published schedule’s median was 18 minutes.
Based on 3,161 direct trips between 2026-08-20 and 2026-09-18, the median observed ride was 17 minutes. That was within 1 minutes of the published schedule.
Nine out of ten measured trips finished within approximately 21 minutes. These figures describe completed direct trips; they do not include the time spent waiting for the train.
WHEN YOU TRAVEL
Union Square to Park Street times by daypart
Off-peak produced the fastest median for Union Square to Park Street; Evening rush produced the slowest.
Differences can change as the rolling dataset updates.
Midday
17 min 832 trips · 81% on paceEvening rush
18 min 678 trips · 78% on paceOff-peak
16 min 1,093 trips · 87% on paceMEASUREMENT SAMPLE
How Union Square to Park Street was measured
The Union Square to Park Street estimate uses 3,161 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 Union Square
Trips related to Union Square to Park Street
The Union Square to Park Street record is accompanied by 6 other measured direct rides beginning at Union Square, each with a published median duration.