Watchdog

Map: Schools and Road Pollution in Washington State

By September 5, 2013December 2nd, 2015No Comments

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Definitions

In the map above, high-traffic routes carry at least 50,000 vehicles per day, according to WSDOT data.

T-1 truck routes carry more than 10 million tons of annual freightage. T-2 truck routes carry more than 4 million tons of annual freightage.