2010. California. Department of Transportation. This point shapefile contains traffic volume (also known as traffic counts) on California's state highway network created from 2010 Average Annual ... California. Department of Transportation.
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2010. Dru Dunton and California. Department of Transportation. This line shapefile represents traffic bottlenecks, or heavy congestion during peak a.m. and p.m. travel periods, on California's State Highway sys... California. Department of Transportation.