Google today announced a new version of its Google Maps app for both Android and iOS. The software now dynamically reroutes turn-by-turn driving directions if traffic conditions worsen on the road ahead. The service also shows and lets you see details of alerts for specific traffic-related incidents that might affect a trip. It will be available "this summer".
I could have used that today. When I got on the interstate, traffic was backed up to just past where you could see until you turned onto the ramp and it was too late. It took me 20 min to get to the next exit and taking an alternate route added another 10 min on top of that. If I had stayed on my original street and not gotten on the interstate, that route would have likely only added 5 min to my normal drive. Google could have saved me 20 min today.