State of play: Waymo began deploying a fleet of cars with a human driver in Philly this week. Yes, but: You can't hail one. The fleet is closed to the public as the company develops its autonomous driving technology and familiarizes itself with the city.

Waymo has begun offering teen accounts for families in Phoenix as it works to expand more of its user base and entrench young riders in the autonomous life.

Philadelphia is one of more than 10 cities where human autonomous-technology experts will be taking Waymos on summer “road trips,” allowing the cars “to get to know the city,” spokesperson Sandy Karp said in a statement. The testing fleets are closed to the public.