Alphabet's Waymo is expanding its commercial service, and Amazon's Zoox said it plans to test in more U.S. cities, as the nascent robotaxi market gains momentum. Waymo, which has a commanding market lead in the U.S., said it's now offering driverless rides to customers in San Diego, Tampa, Florida, and Denver, the first time the company will have commercial operations in Colorado. Zoox, meanwhile, said it will begin testing its toaster-shaped vehicles in Houston and San Diego with human...
