Close is a travel time map of the United States. Pick the destinations that matter to you, and Close colors every block by travel time to the furthest of those destinations.

• Search for your city or neighborhood
• Add destinations in the bottom-left panel
• Set walking, biking, or transit for each one
• Click any block to see its travel times

See also Introducing à portée – a new tool to map walkability for every single block in Canada. à portée only supports walk routing for now but Christian Miles has plans to expand it to cycling and transit.