Google has a new feature that will let you know how busy restaurants are and how long lines in stores are at any given time.

Google is rolling out this new feature in its search results that shows hourly foot traffic at millions of different businesses around the world. The feature works by using anonymized location data from people’s mobile phones, much in the same way Google measures traffic congestion data.

Google has gotten scarily good at predicting when a traffic jam is going to slow drivers down, so it will likely get equally skilled at predicting peak waiting times in stores and restaurants.

The feature is available across mobile phones and will begin rolling out in the next few days.