JazzMan
Elder Lister
Google uses the information from your smartphone to determine whether there is gridlock. The proximity of those phones to each other and the speed with which thet are moving will indicate to Google whether there is gridlock.Are you using Google maps to claim kuna jam? Does Google map use sensors on the road to determine whether to mark a road segment as congested?
It's a good way of doing it, but it is easily spoofed.

Guy causes Google Maps "traffic jams" by carrying 99 cell phones
Turns out virtual traffic jams are way better than the real thing.
