Smilerk
Smilerk t1_j9umjfs wrote
Reply to comment by austinmartinyes in T unveils new slow zone dashboard providing never-before-seen look at subway condition by austinmartinyes
Correct!
Smilerk t1_j9umg7b wrote
Reply to comment by michael_scarn_21 in T unveils new slow zone dashboard providing never-before-seen look at subway condition by austinmartinyes
Volunteer for TM here who made the SZ tracker :)
Our algorithm only flags a slow zone when its travel time is 10% higher than the median for 4 days in a row. Some of these slow zone orders are only for a few hundred feet of track which only accounts for a few second delay in overall travel time between two train stops.
TLDR -> MBTA is showing more granular slow zones, which is important. But not all have a big impact on travel time, i.e. disruptions that riders actually feel.
Smilerk t1_j9v4nh9 wrote
Reply to comment by vhalros in T unveils new slow zone dashboard providing never-before-seen look at subway condition by austinmartinyes
Yes! We use a combination of GTFS feeds, public MBTA apis, and data the mbta gives us itself. But it is only ever arrival and departure times. We have no insight into speeds of specific track segments between two stops