New Study Finds Ridesharing Actually Increases Pollution, Congestion

Greg Bensinger of the New York Times editorial board argues ridesharing companies haven't delivered on their promises of well-paying driver jobs with less traffic congestion (let alone their predictions of an end to car ownership — or even of a sustainable, profitable, business model). And he adds that now a new study "is punching a hole in another of Uber and Lyft's promised benefits: curtailing pollution." The companies have long insisted their services are a boon to the environment in part because they reduce the need for short trips, can pool riders heading in roughly the same direction and cut unnecessary miles by, for instance, eliminating the need to look for street parking. It turns out that Uber rides do spare the air from the high amount of pollutants emitted from starting up a cold vehicle, when it is operating less efficiently, researchers from Carnegie Mellon University found. But that gain is wiped out by the need for drivers to circle around waiting for or fetching their next passenger, known as deadheading. Deadheading, Lyft and Uber estimated in 2019, is equal to about 40 percent of rideshare miles driven in six American cities. The researchers at Carnegie Mellon estimated that driving without a passenger leads to a roughly 20 percent overall increase in fuel consumption and greenhouse gas emissions compared with trips made by personal vehicles. The researchers also found that switching from a private car to on-demand rides, like an Uber or Lyft, increased the external costs of a typical trip by 30 percent to 35 percent, or roughly 35 cents on average, because of the added congestion, collisions and noise from ridesharing services. "This burden is not carried by the individual user, but rather impacts the surrounding community," reads a summary of the research conducted by Jacob Ward, Jeremy Michalek and Constantine Samaras. "Society as a whole currently shoulders these external costs in the form of increased mortality risks, damage to vehicles and infrastructure, climate impacts and increased traffic congestion."

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