Systems and methods are directed to detecting uncontrolled intersections and providing warnings. In response to a navigation request from a user device, the system generates a navigation route using integrated map data, whereby the integrated map data includes indications of uncontrolled intersections that comprise intersections where at least some of the traffic is not required to stop. The system causes presentation of the navigation route in a user interface on the user device and monitors navigation of a vehicle associated with the user device along the navigation route. If the system detects that the vehicle is approaching an uncontrolled intersection based on the monitoring and the integrated map data, the system causes presentation of a warning indicating the uncontrolled intersection in the user interface.