There are problems with every solution.
Ever had a GPS steer you wrong? Think about what happens if the autonomous car gets lost.
What about roads with no markings? Or ones that are covered with snow?
Water filled pot holes? They cannot detect them yet.
Hydroplaning? The resolution before detection, right now, is +-6 feet. Broadcom is coming with new chips to cut that in half. Still, ever driven down a freeway under construction with concrete barriers only a foot away from you?
There is a reason all these autonomous tests are being done in perfect weather conditions and avoiding construction areas.
One day, maybe they will solve all these problems. I am in no hurry for it. I enjoy driving.