Johanson's most recent work has focused increasingly on large-scale projects that combine infrastructure with art, public access, wildlife habitat and ecological restoration.

Johanson creates an ecological master plan for Ulsan Park, Korea, a 912-acre mountainous site within an industrial city. Reconnected and restored ecosystems are interwoven with park infrastructure, while playgrounds reveal the forest canopy, water flowing off the mountain, and Korean agriculture.

Johanson's design for the world's largest landfill, "Millenium Park" in Seoul, South Korea, terraces steep slopes into hiking paths, stairways, overlooks and access roads that form the image of a traditional guardian figure.

Johanson proposes a sculptural path, bike trail, and works of art within the drainage medians along U.S. 81 in Salina, Kansas-"The South Ninth Street Corridor". Sequential landscapes reveal the geology, culture and natural history of this place in a linear garden coinciding with highway infrastructure.

"The Draw at Sugar House", Salt Lake City, creates an under-highway crossing for people and wildlife. Sculptural landmarks form seating, overlooks, water features and paths, while creating habitat, harvesting storm water, and recalling local history. Johanson's design won an NEA competition and Utah Governor's Grand Achievement Award for Planning and Design.

"Nairobi River Park" was designed to create jobs, sustain traditional culture, enhance a wildlife corridor and reclaim a river. Meandering bypass channels form images of living creatures, while microbes and wetlands plants remove pollutants, creating healthy habitats and safe drinking water.

"The Rocky Marciano Trail" posits the city as an ecological art form. Major sites dedicated to Rocky Marciano, Lemuel Ashport and Father Thomas McNulty, are connected by forest corridors and small brooks, reinstating the continuity of natural systems throughout the urban fabric.

"Les Fleurs de France", designed for the French Embassy Cultural Services garden in New York, celebrates the history and culture of France through the lens of two simple flowers.

Ellis Creek Water Recycling Facility in Petaluma, California processes sewage and produces recycled water within the context of restored ecosystems and a public park. The Salt Marsh Harvest Mouse, a local endangered species, becomes a unifying image for the polishing wetlands.