with real–time help from other drivers. Waze is the world's largest community-based traffic and navigation app. ... Waze is a free social mobile app that enables drivers to build and use live maps, real-time traffic updates and turn-by-turn navigation for an optimal commute.
I love waze because it tells you where cops are, objects in roads, hazards, pot holes etc. The unknown which is why its the best and highly recommend.