Traffic jams are highly "volatile" in my area.

I commute using one of the several paths and there's only a coarse relationship between the times and paths congestion, but there's absolutely no certainty regarding the actual congestion. Single broken down vehicle on the single lane road can cause backpressure to the key places and make non-obvious variants MUCH better.

As a result I always drive/ride with Waze (I know! ) and I'd love some alternative. Google maps is too slow.