Lyft begins to offer Waymo rides in Nashville at no additional cost, the second city where it is offering robotaxi trips, as it plays catch up with Uber (Natalie Lung/Bloomberg)

Lyft has begun providing Waymo robotaxi rides in Nashville without charging riders an additional fee, marking the service’s second U.S. city after its launch in Phoenix. The partnership lets Lyft users request autonomous Waymo vehicles through the Lyft app, expanding Waymo’s consumer footprint while Lyft competes with Uber’s growing autonomous-vehicle initiatives.