Forget the complexity of vehicle design & maintenance, who designs some of these knotty interstate systems?

Some overhead ramps in parts of DFW look like someone emptied several large cans of silly string, albeit with concrete and steel!!!

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2009 ML350 (106K) - Family vehicle
2001 CLK430 Cabriolet (80K) - Wife's car
2005 BMW 645CI (138K) - My daily driver
2016 Mustang (32K) - Daughter's car