Understanding geographical connectivity in the United States. This project
computes and visualizes the shortest travel time, considering driving and
flying, between any county and any other county in the U.S.
Hovering over a county shows principal city and name. Clicking on a
county shows the mode of transportation to reach other counties. An
isochrone map, showing the travel time to each location, can also be
accessed.
Maps of Connectivity
These maps show summary values on the level of connectedness (average
one-way travel time) for each county in the U.S. Four maps are available
showing connectivity for geographical area or population based on
continental 48 or all 50 states.
This map divides the U.S. into regions based on catchment areas of airports
by showing the primary airport used for air travel from each county to
the largest segment of the U.S. population.