Fully driverless cars are hitting San Francisco streets for the first time

Companies such as Cruise and competitor Zoox, acquired by Amazon this year, have set their sights on San Francisco, seeing the potential payoff of conquering a complex urban environment and the country's second-most densely populated major city, rather than starting small and gradually increasing their capabilities. But analysts have said self-driving vehicles will have to deploy unique skillsets for each of the environments where they are dispatched.