Garmin and Magellan are two brands of GPS navigators that determine and suggest routes based on real-time traffic. Most of their GPS devices alert users about heavy traffic due to accidents, construction or other delays.
Among the best models of Garmin GPS navigators are the Nuvi 2495 LMT and the Nuvi 3490 LMT, according to CNET in 2010. Both models offer a touch-screen interface, voice command features, detour options, phone pairing and favorite destination tracking. The Magellan RoadMate 3065 Commuter features a one-touch menu to access favorite destinations, emergency services options, 2D and 3D maps, and Bluetooth hands-free calling when paired with a phone.