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Evaluating Alternative Strategies for Traffic Reduction in Los Angeles

Author

Listed:
  • Bento, Antonio M
  • Hall, Jonathan D
  • Heilmann, Kilian

Abstract

Traffic congestion is a major problem in large cities worldwide. This project uses high-frequency data from the Los Angeles metropolitan area combined with an instrument that varies spatially and temporally to estimate the causal impact of an additional vehicle mile traveled on travel times. Specifically, the research team exploits the network structure of the Los Angeles highway system and uses crashes on close alternative routes as exogenous shocks to traffic demand. To do so, the team relies on Google Maps to determine the ideal route and alternatives for over 19,000 real-world commutes. The researchers estimate that at peak times an additional trip reduces speed by, on average, 0.22%. They find the optimal toll at peak times is 33 cents per mile, with the toll being lower, even zero, off-peak. The researchers show how this toll varies over space and time, as well as report on its distributional effects. This toll would more than double highway speeds during peak times and only requires reducing vehicle miles traveled (VMT) at the peak by 10%. The resulting social welfare gains are over two billion dollars per year. View the NCST Project Webpage

Suggested Citation

  • Bento, Antonio M & Hall, Jonathan D & Heilmann, Kilian, 2023. "Evaluating Alternative Strategies for Traffic Reduction in Los Angeles," Institute of Transportation Studies, Working Paper Series qt6c60v3h7, Institute of Transportation Studies, UC Davis.
  • Handle: RePEc:cdl:itsdav:qt6c60v3h7
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    References listed on IDEAS

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    1. A. Colin Cameron & Jonah B. Gelbach & Douglas L. Miller, 2011. "Robust Inference With Multiway Clustering," Journal of Business & Economic Statistics, Taylor & Francis Journals, vol. 29(2), pages 238-249, April.
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    More about this item

    Keywords

    Physical Sciences and Mathematics; Social and Behavioral Sciences; Alternatives analysis; Congestion pricing; Tolls; Traffic speed; Travel time; Vehicle miles of travel;
    All these keywords.

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