[rmdundon]

Interesting concept. I like the overlay idea, but I think simply having that as a standalone map would not be useful in other areas where distance as the crow flies ≠ time traveled. Areas with large bodies of water (like adjacent peninsulas), mountainous areas or areas with strange road infrastructure (Some parts of Virginia).

Nonetheless, an interesting concept!

[lemonlyman516]

The distance changes as you change your mode of transportation - so barriers would be taken into account for the time traveled.

[zwily]

My impression is that the distance is not "as a crow flies". It's distance given the mode of travel you specify.