Today’s the day: Waymo’s unlikely partnership with Uber is now live in Austin, Texas. The former rivals have joined forces in the hopes of accelerating the transition to autonomous vehicles, and as of today, any Austin resident with a desire to take a trip in a fully driverless robotaxi can open their Uber app and hail away.

Uber users in Austin now have a choice between a Waymo robotaxi and a human driver. The two companies officially launched Tuesday the "Waymo on Uber"

The Alphabet unit starts commercial operations in its fourth city, where rides can be booked with Uber’s app. Uber is also providing charging and maintenance services.