A PR disaster.
The whole of the city centre was inaccessible to traffic for (as far as I know) about 5 hours. People could not get to or from the train station. Trains were missed and collections were not made. There was no prior warning that I saw or heard; there were no roadsigns up to say what roads were closed; people in the station were not told that the station was inaccessible, and that no taxis could reach them.
I heard some of the comments from those caught up in this mess. Running has just creted itself some enemies - and quite needlessly. Those who love running should be very angry about this.