I’ve been using Trapster on my iPhone for over six months now. It works OK, sometimes it has trouble keeping track of where I am when I am. Sometimes it just stops. Start again and it works. It’s nice to know where the speed and red light cameras are. It has saved me speeding tickets several times. ;o)
I wish I knew how to make an app.
I’d make one similar to this where 2 touches on the iPhone enters the data about the issue. One touch tells where you are, and one tells if it’s a speed trap/checkpoint/etc. from a dropdown menu that opens when you touch your location.