BOSTON · MEASURED TRIP TIMES + 30-DAY SERVICE WINDOW
How long does
your trip take?
Trip planners show the timetable. TransitMeter measures completed rides, slower-trip ranges and service consistency from official vehicle records.
Explore measured trip times →Latest window: Aug 17, 2026–Sep 15, 2026 · Official MBTA LAMP records
- 1,271,764
- stop observations
- 123,477
- trips observed
THE BOARD
Boston line reliability
Scores combine headway balance and segment travel-time adherence. Higher is steadier. See the formula →
WHAT THE DATA SAYS
01Mattapan Line led this window.
Its 93/100 score reflects 89.7% balanced arrivals and 99.7% of measured segments running within two minutes of schedule.
Read the line report →Green Line was the least steady.
19.4% of comparable arrivals followed a gap longer than 1.5× the scheduled interval.
Orange Line moved most.
Its latest seven-day average changed +5.4 points versus the first seven days in this window.
WHY THIS EXISTS
A timetable is a promise.
We measure the delivery.
TransitMeter turns raw operational records into rider-readable evidence. We publish the formula, preserve the time window and link back to the source.
We describe patterns—not causes. A low score may reflect construction, incidents, weather or other conditions that require separate evidence.
About the project →THE TRIP-TIME ATLAS
2,767 direct journeys.
Measured one by one.
Reliability is useful; the question riders actually ask is simpler: how long will my trip take? TransitMeter now answers that with completed-trip evidence, including a typical time and a slower-trip allowance.