Billboards can be quite a distraction to drivers, and some cities have banned digital billboards. However, I haven't been able to find any information on non-digital billboards, which don't seem to be significantly less distracting in many cases.
Are there any federal laws regulating non-digital billboards to lessen distractions for drivers?
I ask for federal laws because of applications to interstate highways. I don't know if any regulations would be applied by states or by the federal government, since billboards by the boundary of a state can distract drivers on both sides of the state line.