What’s the average car fuse box replacement cost?

I don’t understand why pop-up headlights were banned. Do they make driving more dangerous somehow, or was there another reason that they were made illegal?

I drove over a giant board sitting in the middle of my lane when I got onto the interstate, and I saw it too late and couldn’t slow down. Nothing seemed wrong when I looked under my car later, but now when I’m driving it doesn’t feel right. I think something under my car does need to be repaired. How much would this cost?

I am going for my driving test next week, and the weather calls for rain. Does the DMV do driving tests in the rain? Can I choose to reschedule if it makes me nervous?