text: The law has also made it hard to develope these driverless cars. What would happen if someone was to wreck in a driverless car? Would it be the driver's fault or the car's? No one has worked out the details yet. Most states don't even let you test driverless cars. The "traffic laws are written with the assumption that the only safe car has a human driverin control at all times". Once they prove that the cars are more "reliably safe" the other states will join in testing driverless cars.