From StreetsBlog NYC:
Contrary to the story Uber, Lyft, and their peers like to tell, ride-hailing services are not reducing traffic in American cities. Nor will they, even if they meet their goals for converting solo passenger trips to shared rides, according to new research from transportation analyst Bruce Schaller.
While ride-hailing companies add options for people to get around without owning a personal car, Schaller shows that the overall effect of their growth has been to jam more motor vehicle traffic onto crowded city streets. Also known as transportation network companies, or TNCs, Uber and Lyft haven’t just supplanted taxis, they’ve more than tripled total for-hire vehicle mileage in the span of a few short years.
Most of this mileage is concentrated in the nation’s largest, densest cities, where TNCs compete with transit more than personal cars. Fully 70 percent of Uber and Lyft trips are in nine major metropolitan areas, adding 5.7 billion vehicle miles annually.
If cities don’t take steps to curb car traffic and prioritize spatially efficient modes like transit and cycling, Schaller warns, Uber and Lyft will continue to exacerbate urban traffic congestion and weaken surface transit systems.
Schaller’s report, The New Automobility [PDF], augments previous research with newly available TNC trip data and thousands of interviews from the National Household Travel Survey.
The main conclusion is that TNCs are bound to generate more car traffic in cities for two reasons: They mostly draw passengers who wouldn’t have otherwise used a car, and each TNC trip includes significant mileage with no passenger.
Travel surveys consistently reveal that only about 20 percent of TNC trips replace personal car trips. Another 20 percent replace traditional taxi services. The bulk of TNC trips — 60 percent — either replace transit, biking, and walking, or would not have been made without the availability of TNCs.
Uber and Lyft have pivoted to emphasize the growth of their shared-trip services like UberPOOL and Lyft Line, but Schaller demonstrates that even under the most optimistic scenarios for shared-ride adoption, the net effect of the services is to generate more traffic than a scenario in which they did not exist....MUCH MORE