reading the signal…
Signals / Object / Street-level imagery
in Chicago, IL·counted·523 all time
Rail tracks are parallel steel rails with sleepers, forming a railway route for trains and other rail vehicles.
Counted, not streamed: Rail Tracks 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.