County-to-County Worker Flow Map
Choose the (i) info tool and then click on a county to display the top journeys to and from that county
Initial Map   click on the map to recenter it     click on the map to zoom in     click on the map to zoom out     click on the map to display journeys to and from a county  
map legend

Source: Census 2000 County-to-County Worker Flow Files http://www.census.gov/population/www/cen2000/commuting.html