Morning rush
17 min 465 trips · 96% on paceOBSERVED MBTA TRAVEL TIME · 30 SERVICE DAYS
Park StreettoUnion Square
Green Line
A direct MBTA train from Park Street to Union Square took a median 17 minutes across 2,510 observed trips; 90% of measured rides finished within approximately 20 minutes.
Source: MBTA Performance Data · 2026-08-20 to 2026-09-18 · Completed direct trips only
Typical17 min50th percentile
Slower trip20 min90th percentile
Scheduled20 minmedian timetable
On pace94%within 2 min of schedule
THE SHORT ANSWER
How long does Park Street to Union Square take?
The median completed ride from Park Street to Union Square was 17 minutes; the published schedule’s median was 20 minutes.
Based on 2,510 direct trips between 2026-08-20 and 2026-09-18, the median observed ride was 17 minutes. That was within 3 minutes of the published schedule.
Nine out of ten measured trips finished within approximately 20 minutes. These figures describe completed direct trips; they do not include the time spent waiting for the train.
WHEN YOU TRAVEL
Park Street to Union Square times by daypart
Morning rush produced the fastest median for Park Street to Union Square; Evening rush produced the slowest.
Differences can change as the rolling dataset updates.
Midday
17 min 596 trips · 93% on paceEvening rush
18 min 527 trips · 94% on paceOff-peak
17 min 922 trips · 94% on paceMEASUREMENT SAMPLE
How Park Street to Union Square was measured
The Park Street to Union Square estimate uses 2,510 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 Park Street
Trips related to Park Street to Union Square
The Park Street to Union Square record is accompanied by 6 other measured direct rides beginning at Park Street, each with a published median duration.