yeah, that's the one. i went through last night at about 6:30, and there were large pieces of wood blocking much of the lane. a car could not squeeze through, but a bike surely could when there are not workers present, as was the case with my trip through.
i actually went through three "road closed" signs last night without any ill effects—one in mount washington (on grandview near the mon incline), and one in greenfield (greenfield ave. near magee field). i couldn't help but wonder if there is something about this time of year that prompts street closings.
also, further to Chris's point, i did once go through a road closed sign once that came to a missing bridge about 10-15 miles later. and i crossed the small stream that the bridge was meant to traverse on foot, where someone had built up a dry path of flat and stable rocks. so yeah, even that can be done in a pinch.