I own a Garmin 3590 LMT, and every time that I pass in front a speed camera that is not displayed in my GPS yet, and I want to save it, I don't know what to do.
My intention is, every time that I pass a traffic camera, to save the location immediately to then it can be displayed next time I pass in front.
I have seen a TOMTOM the other day, that whilst you are driving, one of the options on the screen is an icon to add a speed camera. I couldn't find something like this in my GPS.
The best is probably to do it from the safety of your home. Just go to the camera list, press the Add button, find it in Google maps and enter. Some of these cameras can photograph you while fiddling with the device, which is illegal in some countries.
Note, some speed cameras are doubled as surveillance devices in "spare time".