How long can approaching drivers see the frontage?

Where it works

Streets and buildings come from OpenStreetMap, so Drive-By Visibility runs for any address where they are mapped, in Toronto, across Ontario and beyond. Inside the City of Toronto it also uses the City's measured traffic speeds and volumes and its 3D building massing; elsewhere it uses posted or default speed limits and OpenStreetMap building heights.

How it works

We trace every drivable approach back 300 m from the site's frontage and test sight lines from a driver's eye 1.1 m above the road against the real building footprints and heights. The stretch in view, at the road's speed, gives the seconds of visibility on each approach; approaches with under two seconds in view are grouped into one closing line. Where the City has counted a street, the table also shows its daily traffic volume.