OVER THE LAST HALF-DECADE, PUBLIC TRANSIT RIDERSHIP DECLINED nationwide. The number of vehicle miles traveled in cars is rising, and traffic congestion is getting worse in many U.S. cities. At the same time, the century-old taxi industry is struggling, with many taxi companies going bankrupt.

Are ride-hailing companies such as Lyft and Uber to blame? What has been their impact and what should be done?

While ride-hailing threatens public transit, it is also key to its future success — but only with smart policies and the right price signals. As researchers working at the intersection of energy, the environment, and public policy, we have been analyzing transportation trends for decades — and seeing remarkably little innovation. Now we are on the cusp of major transformations. We see ride-hailing through the framework laid out in Daniel Sperling’s new book, “Three Revolutions: Steering Automated, Shared, and Electric Vehicles to a Better Future.”
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