Click on the route number in the upper right hand corner box.
Hwy is listed south to north - with county references.
Look for AADT - Average Annual Daily Traffic
Often higher in summer - esp. on popular tourist routes like the PCH.
From the north -
Light traffic n. of Ft. Bragg, very busy thru Ft. Bragg, pretty busy all the way to Hw 128,
Moderate traffic between Hwy 128 and Hwy 116, increasing traffic all the way into SFO.