ride sharing
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The issue: One transportation model used by ride-sharing cars (formerly called “taxis”) is the “carpool”-style trip, where multiple passengers are picked up and dropped off at various points along a mostly-shared route. (Lyft Line and Uber Pool are currently the most well-known of these.) This “carpool”-style trip is cheaper than a normal ride for each…
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The issue: When you call for transportation in a crowded area (Fig. 1), it’s often unclear both: 1) For you, the pedestrian, which of the numerous indistinguishable late model imported silver cars is picking you up 2) For the driver, which of the many pedestrians is actually the one who summoned that specific car. Fig…
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Background: It’s often hard to assess the total cost of renting vs buying. For example: Renting a house (plus renters’ insurance) versus owning a house (plus homeowner’s insurance, property tax, and maintenance, and possibly offset by property value appreciation) Owning a timeshare versus renting a vacation house once a year Taking a taxi / using…

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