Have you heard about Waze?
Waze is the world’s largest community-based traffic and navigation app.
It is available for iOS and Android. It’s one of the best navigation apps for routing around heavy traffic, especially in larger cities.
“Imagine millions of drivers out on the roads, working together towards a common goal: to outsmart traffic and get everyone the best route to work and back, every day.” Waze
It is very easy to report heavy traffic or accidents so that other Waze users are aware.
Download it from the App Store or Google Play.