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A comment on To fix L.A.'s traffic, we need tolls. Parent comment
Putting a motor on each axle or wheel normally solves the problem.
For more extreme situations: cable car, cog railway, linear motor... all of which can actually go vertical but then we call it an elevator.
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Putting a motor on each axle or wheel normally solves the problem.
For more extreme situations: cable car, cog railway, linear motor... all of which can actually go vertical but then we call it an elevator.