1) The proposed design for the Manchaca Expressway aims to seamlessly integrate the transportation facility into the natural environment through techniques like bioswales and wildlife habitat preservation and restoration. 2) Key elements of the design include shifting from conventional stormwater management to "Regenerative Hydrologic Recycling" using native plantings, reconnecting people with nature through multi-use paths, and minimizing long-term maintenance costs through sustainable design approaches. 3) Notable design features address specific environmental sensitivities like eliminating piers in Bear Creek and preventing surface runoff into Flint Ridge Cave by covering the roadway with an elevated multi-use path and deck.