A new study co-authored by MIT researchers, in collaboration with the Institute for Informatics and Telematics of the National Research Council of Italy, provides a model that shows the extent to which ride-sharing competition clogs the streets — allowing analysts and policymakers to estimate how many vehicles and firms might form an optimally-sized market in a given metro area.
“What this shows is that by not coordinating ride-hailing companies, we are creating a huge amount of additional traffic,” says Carlo Ratti, a professor in MIT’s Department of Urban Studies and Planning (DUSP) and co-author of a new paper detailing the study’s results. “If cities were to use a platform to coordinate ride-hailing, we could reduce overall congestion and traffic in cities all over the world.”
Ultimately, the scholars found that adding a standard-sized ride-hailing firm to the market had varying effects on the number of vehicles that would be deployed in an attempt to meet demand. In Manhattan, a new competitor entering the market would only increase the quantity of ride-providing vehicles by about 3 percent. In Singapore, that figure is 8 percent, and in Curitiba, it is 67 percent. This is what the researchers call the “cost of noncoordination”.
Ratti, Santi, and their colleagues say the results strongly point to the policy of having one main ride-sharing platform for consumers in a given city, which all competing firms could use. That could enhance efficiency even as market competition still exists.
“Certainly this doesn’t mean arguing for less competition,” Ratti says. “We can combine competition and efficiency by using a common platform. It’s just a matter of regulation by the cities. And these are heavily regulated markets, so we’re not arguing for anything new.”
And as Santi points out, “These kinds of digital platforms already exist in many U.S. cities for micromobility,” that is, bike-sharing services. “That’s a model that could also work for on-demand mobility like Uber and Lyft.”
Ratti, Santi, and their colleagues say the results strongly point to the policy of having one main ride-sharing platform for consumers in a given city, which all competing firms could use. That could enhance efficiency even as market competition still exists.
“Certainly this doesn’t mean arguing for less competition,” Ratti says. “We can combine competition and efficiency by using a common platform. It’s just a matter of regulation by the cities. And these are heavily regulated markets, so we’re not arguing for anything new.”
And as Santi points out, “These kinds of digital platforms already exist in many U.S. cities for micromobility,” that is, bike-sharing services. “That’s a model that could also work for on-demand mobility like Uber and Lyft.”
To conduct the study, the research team obtained anonymized taxi data, as a way of determining where people request rides from, for five cities: Curitiba (in Brazil), New York (for Manhattan only), San Francisco, Singapore, and Vienna. The number of trips recorded ranged from 300,000 in Vienna to 150 million in New York.
Using those data as a proxy for all ride-hailing demand, the researchers then modeled the flow of traffic needed to pick up all the passengers with optimal efficiency, as well as scenarios in which multiple firms competed independently of one another. This approach allowed the team to isolate the effects of adding new ride-hailing firms to a given market
The authors are Daniel Kondor, a researcher with the Singapore-MIT Alliance for Research and Technology (SMART); Iva Bojic, a researcher with SMART; Giovanni Resta, a researcher at the Institute for Informatics and Telematics of the National Research Council of Italy; Fabio Duarte, a lecturer in DUSP and principal research scientist at MIT’s Senseable City Lab; Paolo Santi, a principal research scientist at the Senseable City Lab and research director at the Institute for Informatics and Telematics of the National Research Council of Italy; and Ratti, who is a professor of urban technologies and planning in DUSP and the director of the Senseable City Lab.
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