Waymo is winning in San Francisco

The self-driving car service Waymo has been active in San Francisco for 20 months and has already captured 27% of the city’s rideshare market, according to new research compiled by Mary Meeker’s Bond venture capital firm. That rapid progress suggests the mainstreaming of self-driving car service could happen faster than once thought.

“What we’ve done in San Francisco is prove to ourselves—and to the world—that not only does autonomy work, but it works at scale in a market and can be...