U-traffic is based on a simulation engine for drones. Since we want to achieve realistic movements we would not be satisfied by simply animating a drone icon to move from one point on the map to another. For example, any drone needs to gain certain altitude before flying anywhere. Moreover, upon a request, we can turn on 3D visualization of drones so you can observe their propellers spinning the way it happens in real life. U-traffic also accurately depicts not-that-desired aspects of reality as drones' charge is not unlimited and at some point, they have to return to the base to recharge. U-traffic's simulation engine is flexible so that it can be extended with some additional functionality if requested.