On the rider side, women and nonbinary riders will see an option to “count me in” in their Lyft app. Choosing this will “increase their chances of matching with women and nonbinary drivers,” according to this blog post from Lyft.

For drivers, the feature is based on the gender marker on their license on file, and for riders, on their gender setting within the app, explained CJ Macklin, senior communications manager at Lyft, in an email to The Verge. “Both riders and drivers will have the option to update their gender settings at any time to ensure it is reflective of their personal gender identity,” said Macklin.

It's opt-in on both sides.