I'm not a big fan of the traffic light wifi idea. For starters, I think people trying to time the lights just right trying to hit a changing light at 35mph are

I'm not a big fan of the traffic light wifi idea. For starters, I think people trying to time the lights just right trying to hit a changing light at 35mph are crazy and are just asking to be hit by someone trying to beat a red. Moreover, in places where the lights are influenced by the cars around, I think it's usually pretty easy to tell if a light is going to change soon. But, I do think we will start seeing a lot more tech in the automotive future. I think it's the newest prius that has an auto-sensing cruise control, to adjust the speed to the car in front of you. I've been wanting that for years. Also, I think it's the first step in integrating autonomous drivers on the road. I've also heard about work on a "train" like vehicle that other cars could attach to and be dragged along. Idea is that it'd be more efficient, plus the drivers would get to relax on their commute. Like you mentioned about communicating where potholes are, I think all cars should be alerted to emergency personnel on the side of the road well before they reach them. I think maybe some radar detectors do something like this, maybe as a side effect. Something built into GPS would be awesome though.