It is an odd two blocks to shut down.
There were barricades at either end with "Special Event" signs. No other signage, no vendors or food trucks. None of the businesses were making use of the space. People were scratching their heads wondering what the event was.
If you're doing a test of a pedestrian mall there has to be something to entice pedestrians to use it. A big empty stretch of asphalt isn't going to cut it.