The incident reporting feature, which Google Maps borrowed from Waze last year, has received a nifty upgrade this month. If you are caught in a traffic jam, you will now be able to report it manually using the ‘Slowdown’ button located inside the ‘Add a report’ tab.

Until now, users could only report accidents or crashes, and in some places, were able to flag down a speed camera. This new feature should come in pretty handy for those who have a daily commute. By reporting an unusual buildup of traffic, drivers can give others a chance to opt for alternate routes or leave later from their location.

The basic idea is to crowdsource live information from an area to make route conditions more accurate than ever. Google Maps already shows live traffic conditions on a given route using different colors to represent the flow, but that process is admittedly longer and more complex. Google first takes the data sent by sensors, local transport authorities, and anonymized users, and matches it against the average time it historically takes to travel a particular section of road at a particular time of the day.

By giving users the authority to report slowdowns (or ‘Congestion’ for those using UK English as default language), Google will be able to access real-time data more quickly and potentially improve its traffic prediction accuracy. The reporting happens as soon as you tap the ‘Slowdown’ button, but Google Maps gives you a few seconds to stop the action if you happen to press the button by mistake. Also, to ensure that miscreants do not flood Google’s servers with false information, Maps does not let you report a traffic jam in the same area more than once during the commute

The feature has already been rolled out for Android users, but it’s not yet clear when iOS users will receive this functionality.