SOME HELPFUL TIPS FOR PLACING A PARK ON TOP OF AN UNDERGROUND FREEWAY Meanwhile, in Dallas: What goes into the equation to span a park across a multi-lane underground freeway tunnel, as TXDoT’s latest updates on the planned I-45 redo suggest might be possible? Planning for Klyde Warren Park, which covers an underground section of the Woodall Rogers Freeway between I-35 and I-45 at the edge of downtown Dallas, had to take into account everything from the weight of hundreds of thousands of feet of fill, potential damage to structural elements from root systems, anticipated visitor weight, and all the other little projects that private donors wanted to add. Project coordinators also faced mid-project fire code changes, limited freeway closure allowances for construction, and a $16.7-million funding shortfall that was eventually closed by 2009’s Recovery and Reinvestment Act. The park officially opened in 2012 with a concert headlined by Trombone Shorty and the Polyphonic Spree. [D Magazine, Klyde Warren Park]