Friday, August 21, 2026

peak-147rough-daylong-gap

Day health

100 = every line running clean

Arrivals recorded

41,374

311 distinct trains

Peak trains at once

147

7:30 AM

Worst gap

212 min

Mattapan · Ashmont · 1:52 PM

The Score

open SVG

String-line diagram of every MBTA subway train on Friday, August 21, 2026

Time runs left to right across the service day (4 AM → 3 AM). Each panel is one line, top to bottom along the route. Every diagonal is a single train: steep is fast, flat is stopped, a cluster is bunching, and blank space is the wait you remember.

Trains in service

Line by line

Redstrained

median 6m · p90 14m

7,180 arrivals · 26 trains

Orangehealthy

median 6m · p90 11m

2,990 arrivals · 7 trains

Bluestrained

median 5m · p90 11m

4,550 arrivals · 19 trains

Green-Bhealthy

median 9m · p90 16m

6,548 arrivals · 33 trains

Green-Chealthy

median 10m · p90 19m

4,353 arrivals · 31 trains

Green-Dstrained

median 9m · p90 18m

6,868 arrivals · 88 trains

Green-Estrained

median 8m · p90 17m

7,309 arrivals · 52 trains

Mattapanrough

median 7m · p90 27m

1,576 arrivals · 4 trains

First light

The first recorded arrival on each line — the day starting without you.

5:15:52 AMQuincy Adams
5:16:36 AMGreen Street
4:30:08 AMBowdoin
4:01:02 AMBoston College
4:16:10 AMCleveland Circle
4:18:01 AMRiverside
4:45:28 AMGilman Square
5:05:45 AMMilton

Last call

The last recorded arrival on each line. After this, the tunnels go quiet.

2:14:35 AMDavis
2:35:28 AMGreen Street
2:18:25 AMWonderland
2:59:54 AMBoston College
2:25:27 AMCleveland Circle
2:46:34 AMRiverside
2:40:19 AMEast Somerville
2:34:15 AMMattapan

The wait you remember

212 minutes of nothing on the Mattapan at Ashmont, starting 1:52 PM.

Rendered 3:40:06 AM ET · 1-minute resolution · mbta.cold.fyi