There's a couple of apps that provide navigation that use exactly the same traffic service as Google - which just switched over to INRIX from crowd-sourced input - GPS (by Telenav) and MapQuest (by AOL), which both use NAVTEQ map data (at least in the US). And, check out the INRIX app itself. GPS by Telenav offers silent directions, including traffic-weighted routing at no cost and voice navigation for $10 per year as an in-app upgrade. Mapquest offers voice navigation, but I'm not sure if their routing engine adjusts based on traffic - it's routed me around some jams automatically in the past without needing me to change up my route. I'm always checking DOT cams anyway before I drive off...
Originally Posted by k.trent