The future of driverless car technology is being shaped in courthouses and capitals across the country. Alphabet Inc.’s autonomous vehicle unit Waymo will go to trial in San Francisco on Dec. 4 in a case accusing Uber of stealing technology that allows driverless cars to see the world. Meanwhile, as Congress pursues industry-friendly legislation, states have taken varying approaches. Arizona and Florida have allowed manufacturers to test practically at will. New York and California, however, have set stricter rules, setting a potential pre-emption clash with future federal rules.