Cities offer many modes of transportation: mass transit, solo transit, and human-powered displacement. Many factors go into deciding how to get around---convenience, speed, cost, environmental impact, and health concerns among them. Human-powered vehicles like bicycles, scooters, and skateboards have a lower per-use cost than mass transit, little or no environmental impact, and give the users exercise with each use.; Bicycles are prone to flat tires, and many buildings don't allow them inside or don't have elevators; locking a bicycle outside subjects it to theft, vandalism, and the weather. A skateboard, while not as fast as a bike, never gets a flat tire since the wheels are solid rubber. It's small and light enough to bring with you anywhere, including into a bus or subway. This is another advantage of a skateboard over a bicycle: its adaptability to bi-modal transportation---specifically the combination of human-powered transit with mass transit. The best features of longboards and standard skateboards, combined in a new design, could be further optimized for urban living and bi-modal transportation.; This new design is longer than a standard board, for a smoother ride, but smaller and easier to carry when not in use. It can stand vertically on almost-level surfaces like sidewalks and subway platforms, and also serves as a stool to support the user's weight while waiting for the bus or subway. The rear wheels lock so it doesn't roll away if it falls over. The hole in the front serves as a handle that is easier to grip than the tip of a regular board, and the gap in the middle allows it to be worn over one shoulder if the user wants to keep both hands free. One configuration lets it act as a miniature dolly, to roll along small parcels. This multi-function skateboard is not meant for jumps or stunts, but it's a great way to get around town without weighing oneself down.
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