A low altitude automated 70mph 'fast hover ferry' that is as fuel efficient as a car would be pretty revolutionary. A lot of cases for bridges and the traffic

A low altitude automated 70mph 'fast hover ferry' that is as fuel efficient as a car would be pretty revolutionary. A lot of cases for bridges and the traffic choke points they represent would disappear in places like nyc, sf, seattle and others. People who live on islands could have fast and affordable ferry services to the mainland or other nearby islands. You could also create 'coastline subways' with such tech, but only need to maintain the ferry vehicles themsleves and docks vs road or train track infrastructure.