There are several spots between Victorville, CA, and SR-145 that are only two lanes, one each way. My suggestion is to highlight/identify the sections or roads that are no-pass zones. Roads like this, where there me several miles between passing lanes? Change the color to flashing read, or something. ;-)
Contact me if you have questions.
Almost every time I travel this way I have someone tailgating, wanting to pass me (and I'm already going over the posted limit), and sometimes they pass or try to pass in no-pass zones and I've seen several near misses.

I know everyone isn't smart enough to use Waze ;-), but for those of us that are we don't remember every nook and cranny, speed trap, or no passing lane, etc.

Just a thought.