The U.S. needs similar crossings for all the regions separated by the Interstate system, and somewhere near the center of each region so created, a large wilderness preserve which has roads removed:
The article makes it sound like they took a motor boat into a wilderness preserve? Motor vehicles are explicitly not allowed in those areas.
Also excluding dirt roads is a pretty bad criteria. A lot of GIS marked 'dirt roads' are natural animal trails or washes that have been around for hundreds/thousands of years.
While motorboats are permitted to operate in the marine environment, their presence can influence the wilderness setting.