Sunday, August 23, 2026

peak-99rough-daylong-gap

Day health

76.3

100 = every line running clean

Arrivals recorded

31,917

216 distinct trains

Peak trains at once

4:20 PM

Worst gap

233 min

Mattapan · Cedar Grove · 8:10 AM

The Score

open SVG

String-line diagram of every MBTA subway train on Sunday, August 23, 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

Redhealthy

median 8m · p90 16m

5,272 arrivals · 18 trains

Orangehealthy

median 7m · p90 13m

2,289 arrivals · 5 trains

Bluehealthy

median 8m · p90 12m

3,204 arrivals · 7 trains

Green-Bstrained

median 11m · p90 22m

5,219 arrivals · 39 trains

Green-Chealthy

median 11m · p90 21m

3,707 arrivals · 33 trains

Green-Dhealthy

median 10m · p90 19m

5,693 arrivals · 78 trains

Green-Estrained

median 10m · p90 20m

5,509 arrivals · 33 trains

Mattapanrough

median 12m · p90 38m

1,024 arrivals · 3 trains

First light

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

5:45:10 AMAshmont
6:01:18 AMGreen Street
5:52:31 AMWonderland
4:55:22 AMBoston College
4:57:01 AMCleveland Circle
5:27:30 AMWoodland
5:21:06 AMEast Somerville
5:48:09 AMValley Road

Last call

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

1:15:42 AMShawmut
1:43:16 AMStony Brook
1:13:47 AMWonderland
2:59:49 AMBoston College
1:42:37 AMCleveland Circle
1:52:52 AMRiverside
1:45:57 AMEast Somerville
1:36:36 AMMattapan

The wait you remember

233 minutes of nothing on the Mattapan at Cedar Grove, starting 8:10 AM.

Rendered 3:40:04 AM ET · 1-minute resolution · mbta.cold.fyi