Data: Waymo; Map: Jacque Schrag/AxiosWaymo is accelerating its rollout of robotaxis in the U.S., adding four new cities in Texas and Florida this week as self-driving technology begins to penetrate mainstream America.Why it matters: Armed with $16 billion in fresh capital from parent Alphabet and others, Waymo is quickly extending its lead over other players like Tesla and Amazon-owned Zoox, which are still mostly in testing mode.The newest markets are Dallas, Houston, San Antonio and Orlando.T...