Riding in this morning I decided to take the road route. Huge queue of traffic just around Meadowbank Stadium. Bus lane free (save a few impatient chancers), I scoot by. All down to temporary lights at the top of Easter Road. They're a longer, but not by 'that' much, sequence, and it's causing that big a tailback. Cars at all sorts of angles at junctions, trying to force their way in, or having become stranded. All because of one single little set of temporary lights.
(I have to admit I'm not entirely sure why east and westbound are not given green at the same time. Westbound can't turn right at that junction anyway, so doesn't have to wait for eastbound to clear; and eastbound can't turn right because it's that road that's closed, so doesn't have to wait for westbound to clear. Unless there's something more dramatic planned.