How does the Police Alert feature work in Google Maps? Understanding the technology behind it

Google Maps and Waze now display real-time information such as traffic conditions, road closures, speed cameras, and police presence ahead. But have you ever wondered how Google Maps detects these incidents?

Nowadays, navigation apps like Google Maps and Waze do more than just provide directions. They offer details on traffic, road closures, speed cameras, roadworks, waterlogging, low visibility, and police presence. The question remains: how exactly does Google Maps know if police are present on a road or if an incident has occurred? Let’s explore how the Police Alert feature in Google Maps works.

How the Police Alert feature works in Google Maps

Data for police alerts in Google Maps primarily comes from the app's users. When a driver spots police presence along their route, they can report it using the 'Report' option while navigating. This alert is then visible to other users traveling on the same road, who can subsequently confirm the report. In addition to its own user base, Google Maps can also utilize reports from Waze—another app owned by Google. Through this crowdsourcing method, the app updates real-time information regarding police presence, traffic, and other incidents; however, these reports may not be available in every region and can change over time.

Information derived from user reports

Google Maps gathers live traffic data from smartphones actively being used for navigation on the road. The app has long used machine learning and AI to estimate traffic conditions. However, user reports are crucial for detecting police presence. When a person spots police on the road while navigating with Google Maps, they can report it within the app. This information may then appear on the maps of other users traveling along the same route.

Information also comes from Waze

Google Maps does not rely solely on its own users for real-time information. It can also receive reports from Waze, another navigation app owned by Google. Google Maps can identify which reports originated from Waze users. On Waze, users earn points for submitting reports regarding traffic and road conditions. Receiving data from Waze provides Google Maps with a larger pool of reports to share with drivers.

You can also send police alerts

You can report police presence or other incidents on Google Maps. While in navigation mode, a 'Report' icon may appear on the screen of your smartphone, Android Auto, or Apple CarPlay. Tapping this icon and selecting the 'Police' option allows you to submit a report. Subsequently, a small police icon may appear at your location. These alerts can be enabled or disabled via the 'Alert options' found under 'Navigation' in the Google Maps settings.