Tesla is preparing for its June robotaxi launch in Austin, Texas, with about 300 test operators conducting crucial testing.The company rolled out a test version of its robotaxi app to Autopilot engineers and engaged with local first responders.An internal program named 'Project Rodeo' has been intensifying efforts towards self-driving software development.Tesla's deadline for the launch is set for June 1, aiming to debut a fleet of 10 to 20 self-driving Model Y cars.Challenges include accumulating critical miles for testing in complex driving situations to ensure safety and performance.Test drivers are assigned specialized routes for critical and adversarial testing to evaluate system capabilities.Tesla has been collaborating with local emergency services and first responders for testing and feedback.The company has started demoing the robotaxi app internally and is considering remote operators for safety during public rollout.Despite focusing on Austin and San Francisco for testing, Tesla plans to expand its self-driving cars to other cities this year.Musk mentioned a fleet of Teslas circling Austin for testing, indicating the intensive preparation for the upcoming robotaxi launch.