The party above is happening 6-8-14 as described. See http://www.dallasnews.com/news/transportation/20140603-toll-road-opponents-planning-so-called-funeral-for-trinity-parkway.ece
Here is some of the history leading to this celebration:
Looking northwest where Toll Road was planned for with Sylvan Bridge in the background. Photo taken in 2007 when this was a very popular park.
It will now be one again!