Waze

Waze is a social traffic & navigation app based on the world's largest community of drivers sharing real time road info and contributing to the “common good” out there on the road. By simply driving around with Waze open users passively contribute traffic and other road data. Users can take a more active role by sharing road reports onaccidents, police traps, or any other hazards along the way, helping to give other users in the area a 'heads-up' about what's to come.