The Green Road Project creates a half-mile long green corridor and wheelchair path and a 1.7-acre central woodland healing garden through the campus of Walter Reed National Military Medical Center, Bethesda, MD. The goal is to bring the healing benefits of nature to U.S. service members and their families, particularly those with brain injury and PTSD.  The $6 million public/private partnership, with TKF Foundation as the lead donor, began construction in February 2016 and will open in September 2016. Funded research will use advanced metrics to directly measure whole-body effects of nature exposure. The Green Road will be a long-term national laboratory on the interface between humans and nature.