Reach
Drop a pin on the office. See everywhere you could live and still get to work in time.
Or drag a pin, or click anywhere on the map.
Typical road speeds, not live traffic, and no turn restrictions — so large junctions run generous. These shapes have not been checked against real drives.
Read it backwards
Drop the pin on the office instead of the house and the shape stops being a curiosity: it is every neighbourhood you could live in and still get to work in that time.
Live at the far edge of 45 minutes and you spend 375 hours a year getting to work and back — about 9.4 working weeks, every year, for as long as you live there. Nobody shows you that before you sign a lease.
How much to trust this
It uses typical speeds for each kind of road, so it answers the same at 3am and at 6pm — the hour that decides your commute is the one thing it cannot see. It does not model turn restrictions or waiting at signals, so big junctions run generous.
Nobody has checked these shapes against real journeys yet. Treat a boundary as roughly where the city stops being reachable, not as a promise about your Tuesday.
Nothing is sent anywhere: the road network downloads once, then the travel time to every junction in the city is worked out on your own machine.