1. Amazon's robotaxi unit, Zoox, plans to start testing its autonomous vehicles this summer in Austin, Texas, and Miami, Florida. This will be the company's fourth and fifth public testing cities, following previous trials in Las Vegas, Nevada, and Foster City, California.

2. Zoox, which Amazon acquired in 2020 for over $1 billion, is aiming to compete with other autonomous vehicle companies in the race to develop and deploy self-driving technology for ride-hailing and delivery services. The company's goal is to have its vehicles available for public use in the coming years.

3. The expansion into Austin and Miami will allow Zoox to gather more data and test its autonomous driving systems in diverse environments and weather conditions. This is a crucial step in the company's efforts to refine its technology and prepare for wider commercial deployment of its self-driving vehicles.