scope:

Walking and bicycling are metaphors. While they are unique forms of mobility, they can also be thought of together to represent a "third mode" of transportation that is as important as highways and mass transit. This mode of transport, and the kind of thinking that is required to integrate it into our modern world, symbolizes a different perspective on our way of thinking. If you can understand why non-motorized mobility is important for transportation, you can also see how other problems could be resolved with similar thinking. This thought process is called The Third Mode, and this book describes how it can lead to a more connected, healthy, and sustainable society.