At the US meetup, we discussed Map Problems and the fact that so many of them are false-detections. Since then, examples have been sent in directly to Waze to review.
One in particular is here: https://www.waze.com/editor/?zoom=7&lat ... -122.97734, where Waze posted a problem two days ago showing traffic flowing north on 8th across the gap.
But the gap really does exist, and has existed since at least November, 2012. Google streetview even has the picture of the non-existent portion of street where it was closed off: http://goo.gl/maps/2fEib.
The response from Waze so far, was: "In this specific example we did find an issue with us using an old data that resulted in this false problem. A fix has been deployed and we'll also work on deleting other problems that were generated based on that old data. There are still cases in which we will show merger problems based on old data but that should not be very common and we are thinking on some improvements on that."
So, we will look forward to the issues with falsely-detected Map Problems being resolved, and will continue to submit examples to Waze for their research towards resolution.