reading the signal…
Signals / Object / Street-level imagery
in Chicago, IL·counted·229 all time
A runway is a paved aircraft takeoff and landing surface, typically long, straight, and marked with aviation lines.
Counted, not streamed: Runway 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.