Mindey, 
Pendulum Transport
Reinventing the pendulum (as in "reinventing the wheel)
So far, it seems, pendulum transportation had been used mainly for fun, such as in the case of swings. However, the principle could actually be used for transportation from house to house, either by building pendulums underground, or above the ground (in case of high buildings). You can even think of chain of pendulums one after another, extending over long distances. (Due to low friction, small extra energy is necessary to swing back to the original level on the opposite side.)
[Sorry, couldn't find a better category. The word 'Mass' in 'Mass Transit', is not in the sense of plurality, but in the sense of matter.]
Fun aspect: momentary loss of gravity every time you teleport.
made sketching while talking.
率直に言って、これは潜在的な請負業者に連絡し、無料で見積もりを取得してから、誰かに建設費を支払わせる必要があります。潜在的な顧客として単に手を差し伸べることは、実現への途中である場合があります。
Frankly, this just needs to contact potential contractors, and get the estimates for free, then get someone to pay for construction. Sometimes simply reaching out as a potential customer is half way to realization.