Morning rush
45 min 556 trips · 78% on paceOBSERVED MBTA TRAVEL TIME · 30 SERVICE DAYS
Union SquaretoReservoir
Green Line
A direct MBTA train from Union Square to Reservoir took a median 46 minutes across 3,133 observed trips; 90% of measured rides finished within approximately 53 minutes.
Source: MBTA Performance Data · 2026-08-20 to 2026-09-18 · Completed direct trips only
Typical46 min50th percentile
Slower trip53 min90th percentile
Scheduled47 minmedian timetable
On pace70%within 2 min of schedule
THE SHORT ANSWER
How long does Union Square to Reservoir take?
The median completed ride from Union Square to Reservoir was 46 minutes; the published schedule’s median was 47 minutes.
Based on 3,133 direct trips between 2026-08-20 and 2026-09-18, the median observed ride was 46 minutes. That was within 1.5 minutes of the published schedule.
Nine out of ten measured trips finished within approximately 53 minutes. These figures describe completed direct trips; they do not include the time spent waiting for the train.
WHEN YOU TRAVEL
Union Square to Reservoir times by daypart
Off-peak produced the fastest median for Union Square to Reservoir; Evening rush produced the slowest.
Differences can change as the rolling dataset updates.
Midday
46 min 828 trips · 66% on paceEvening rush
48 min 672 trips · 69% on paceOff-peak
44 min 1,077 trips · 71% on paceMEASUREMENT SAMPLE
How Union Square to Reservoir was measured
The Union Square to Reservoir estimate uses 3,133 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 Reservoir
The Union Square to Reservoir record is accompanied by 6 other measured direct rides beginning at Union Square, each with a published median duration.