I had a long journey in the car over the weekend, and I used Apple Maps on iOS9b5. Twice, it offered me a change to my routing based on a change in traffic conditions with a notification at the top of the screen. I also received notifications about upcoming roadworks as I approached. I don't remember either of these things happening on Maps in iOS 8 on similar journeys. Don't know if that's because of conditions, or whether they're new in iOS 9?