I think it's fair to say that California has a well maintained road network for its size,
The interstates are generally well maintained. The freeways in and around the LA/OC area are a fucking travesty. Potholes everywhere. Some roads are crumbling and coming apart in chunks. They only fix the worst of the worst, and it takes them several years to get to it. I work in the north SFV area, and I've only seen them repave 4 streets in the ~5 miles around my office in the last decade, and only just recently. Meanwhile, the freeways are constantly "under construction" but you rarely see them working on them, even late at night. They like to start 15 projects, tear everything to shit, then spend the next 6 years slowly putting one of them back together. For such a car-centric metro area, our roads are in a totally unacceptable level of disrepair. This isn't New Hampshire, this is Car City USA. Fix the fucking roads. And don't even get me started on the sidewalks.