General Motors, after pouring billions of dollars into its Cruise robotaxi unit over the past eight years, said it’s ending the subsidiary’s stand-alone efforts and will combine it with in-house efforts to develop autonomous driving technologies for personal vehicles.

The Detroit-based automaker said it will no longer fund Cruise’s robotaxi work as it will take too long and cost too much to scale the business to compete with competitors it didn’t identify. Presumably, its biggest challenge is catching up with Waymo, which is carrying hundreds of thousands of riders in its robotaxis every week and is about to expand the service to Miami, Austin and Atlanta.

“Cruise has been an early innovator in autonomy, and the deeper integration of our teams, paired with GM’s strong brands, scale, and manufacturing strength, will help advance our vision for the future of transportation,” Mary Barra, GM’s chair and CEO, said in a statement.

(This is a developing story. Updates to follow.)