I have both the Magellan 3050t and the AvicN2, both with traffic.
They are a little different, but both work very similarly with traffic.
Love them both in CA. Work very well....not perfectly, but well.
The N2 does the similar thing. Asks about whether or not you would like to change the route based on an accident, etc....and shows you the new route and possible addition of time and distance that would ensue.