Actually , I agree with that one. "Through traffic" truckers should stay on the 680 & 580 and stay the hell off of highway 84. Local deliveries are a whole other story.
I spent a lot of time in that area in the early 2000's and on the roads from San Jose to Sacramento and all points in between.
Truckers can easily (and should) stay on the main highways and off of the scenic routes. Especially when they can't climb the hills at over 20 mph (IF there is an option which in the case of 84 there is.)
It was frequently a long, slow drive from San Jose to Santa Cruz...not that there was much of a way for the truckers to avoid that one.