This is very important, since it occured many times. You have to give option in police camera alerts, to choose at which distance to announce alert. Sometimes it announces very near to the police camera. Give options for example 2km, 1km, 500m etc. so drivers can choose. Also give another option to choose, in same area if settings, that will alert or not, on each specified distance (2km, 1km, 500m etc). Give another option to give continuous alert for speed cameras (instead of alerting on each of above distances), with intervals every 1second, 2 seconds......5 seconds. Also give option to choose any sound for the alert. To choose a volume for the alert from Settings, so in case of low volume, alert will not be lost.
In this way users can choose:
1) The distance that notification will start for police cameras (2km, 1km, 500m etc.)
2) Whether they want to be notified or not, in every of the above distance (2km, 1km, 500m, etc)
3) Whether they want to be notified or not, in specified intervals (1second, 2 seconds) until they reach the camera.
4) To choose any sound alert for camera.
5) To choose a volume for the alert from Settings, so in case of low volume, alert will not be lost. In this case the new feature, must override system volume.