Santa Clara County commute shed (Census 2000)
Commuter flows into and within Santa Clara County from the Census 2000 Census Transportation Planning Package. (No more recent commute flow data available.)
207,514 of 924,325 workers came from outside the county.
Coastlines (and a ton of creeks that weren't in my previous import of the data!) from OpenStreetMap. Routed through census tract centroids, not actual roads.