i wasnt arguing with any statement posted here. forgot to post this. this is what i have encountered everytime i drove up 80 in a snowstorm. since we are under the gross vehicle weight, was never required to put chains on, and if it was bad enough for 4x4s to need chains, 80 was closed for everyone. but i also read, that its specific to a region and the dot can and may require vehicle checks on all vehicles. 80 being such a major highway, im guessing they close the road sooner compared to the socal mountains where people are heading up for leisure. i have never been in the socal mountains in winter so i couldnt sayAs has been stated numerous times, 4x4 are required to have chains WITH them not installed. Anecdotal evidence of not having been inspected for chains is great, but it's just that. Anecdotal evidence. I've got my own. 3 out of the last 4 trips I've made out to Mt Laguna during a storm, I was inspected, and turned around the very first time because I didn't have chains or cables with me. This was in my 4x4 Raptor with factory KO2's on it. The next two times I was inspected showed them the chains on the floor in the back seat and allowed to pass. The last time there was no check point when I entered the mountain, but one was setup by the time I was coming back down.
The Cal Trans guidelines have been posted and quoted for clarity. This isn't rocket science. There's no guess work involved. It comes down to, do you want to take the chance or would you rather be safe than sorry.