reading the signal…
Signals / Object / Street-level imagery
in Centerville, OH·counted·41 all time
A mile marker is a roadside sign or post displaying distance along a highway or route.
Counted, not streamed: Mile Marker 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.