Signs to direct to where you need to go around the valley! by Caltrans, and perhaps a sign of things to come.

https://hetchhetchy.org/signs-and-perhaps-a-sign-of-things-to-come-thanks-caltrans/?fbclid=IwAR1w86quNUie8x9rKsef0__29nHPMVjjgr94d7t3Fucb-FCU7dpVZrVHkcA