reading the signal…
Signals / Object / Street-level imagery
in Chattanooga, TN·counted·472 all time
A visibly congested road with vehicles queued closely and moving slowly or not at all.
Counted, not streamed: Traffic Jam has no time series, so it is read as a footprint across places. All-time count by city.
Things that physically exist: street furniture, signs, buildings. All-time counts.