Up to 15 minutes covers an area of 400 square miles if you're driving from a commuter suburb to an office building and take the freeway most of the way. If eith

Up to 15 minutes covers an area of 400 square miles if you're driving from a commuter suburb to an office building and take the freeway most of the way. If either the source or the destination involves a 'proper' city with any kind of population density, that range shrinks considerably.