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分享计程车之旅可以显著减少成本和排放研究表明它可以工作在任何大城市

整理: admin时间: 2018-09-27

By using ride-sharing algorithms, scientists have found there’;s an immense untapped potential for reducing cost and emissions。 Their findings suggest there’;s a universal mathematical framework that can be applied to almost any city to match taxi rides。 Two or three people could use the same cab instead each traveling solo with minimal delays to their destination, the researchers found。

credit: Pixabay

Almost every sizable city in the world is facing problems due to urban transportation。 For one, there’;s traffic which is the bane of any commuter, and then there’;s the issue of air pollution。 Municipalities have always found it challenging to address these problems in their urban planning partly because it’;s genuinely difficult to convince people not to use their own cars。 But almost everyone uses taxis or, as of more recently, ride-sharing apps  —; the problem is most of the time the rides are taken solo。

Established ride-sharing companies such as Uber or Lyft already offer options to customers to share their journey but these are heavily outnumbered throughout the world by traditional taxis。 Researchers led by Carlo Ratti, an architect and engineer at MIT, wanted to see what kind of impact ride sharing among taxis could have。 They chose to work with GPS data sourced from taxis working in San Francisco, Vienna, Singapore, and Manhattan。 All four urban areas have different layouts which proved useful in teasing out universal patterns。

The researchers designed an abstract network of trips which were connected if these could be shareable (no delay to either party of more than 5 minutes)。 The researchers then forecasted what would happen to the number of shareable rides if the number of taxis was to drop in any of the four cities。 They found that despite lower average demand for mobility or fewer available cars, shareability followed a universal law with the same feasibility-demand curve exhibited in all four cities。

本文源自: 环亚娱乐

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