I am fascinated by the history of our roads. It surprises me that you can drive some road that goes through incredible terrain and arrive at say a national park, where you can all kinds of interpretive info...except about that road you just traveled. I've read histories of a few, like 88 and Carson Pass, but there isn't a lot out there about them.
That's why I was really pleased to see these new CalTrans signs on my way back from Death Valley. Not even shot up. Kudos to them.