> My route-finding here is more than a little naïve, instant acceleration to each road's speed limit, full-speed turns, no traffic, lights always with you, etc. but there is a place within 60 minutes of all locations, pre-selected in that URL.

It's an interesting project, but that makes it completely worthless.

Nobody's driving to central London anyway - journey times are measured by public transport. And even if they were driving, the journey times by car are completely dictated by traffic. The average weekday speed in central London is 7.1 mph.

What question does this answer? Where can me and all my friends meet in our cars at 2am?