Neat concept from Mapbox: maps designed specifically for travel-time-based decision-making.

[O]ur decision-making around places — where to go for lunch, if a certain day trip is feasible, and yes, whether a commute is practical — have shifted toward how long it takes to get there. But we still rely on traditional maps to do that: eyeballing straight-line distances, and running that through some alchemy of guesswork and firsthand experience to how long that trip would take.

What would a more directly useful visualization — indeed, a map of time — look like?

Check out the demo.