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Classifying Pedestrians, Bicycles and Motor Vehicles
It's easy to separate motor vehicles from bicycles and pedestrians --
just use those spikes like in gated communities. Cyclists can slip between the spikes or stop and step over them as can pedestrians. A motor vehicle will get 4 damaged tires. Separating cyclists from pedestrians is trickier. The first obvious solution would be to install parallel bars like on cattle stops on sidewalks/pavements. A good wheelman, however, will just hit these at an angle like he does oblique railroad tracks. Maybe some combination of patches of ice and grates would work but that would be expensive to install and maintain and dangerous to pedestrians as well. Moreover the weight of a cyclist + bicycle averages about that of a pedestrian, both an order of magnitude less massive than a motor vehicle. Even more compelling a motor vehicle often represents 2 orders of magnitude more kinetic energy. As a practical matter, is there really any reason not to reclassify cyclists as pedestrians as far as cycling on the sidewalk/pavement is concerned? Bret Cahill |
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