I've noticed lately that Waze is more "lazier" when updating the state of the traffic ahead. Many times, the traffic that was bad, has improved, but Waze continues to show the route as trafficked. And that's a bad thing, because it could suggest alternative routes faster and more often when traffic quickly deteriorates ahead, or choose to take a shorter, freer route when traffic improves. Decrease the traffic update time to improve this point for drivers.