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Daily Archives: March 24, 2023

A Serious Critique of Congestion Costs and Induced Vehicle Travel Impacts

Here is a quick share for today. This is an article by Todd Litman critiquing congestion costs and induced vehicle travel impacts:

Quoting from the article:

It is time for planners to rethink the way we evaluate congestion problems and solutions. Vehicle travel is not an end in itself; our ultimate goal is to improve accessibility. Traffic congestion is one constraint on accessibility, but others are more important. For example, the study, “Does Accessibility Require Density or Speed?” found that a given increase in urban density, and therefore proximity, has a far greater impact on overall accessibility than an increase in travel speed, and therefore congestion reductions. This is particularly true of disadvantaged groups who cannot drive or are financially burdened by vehicle expenses.

It is irresponsible for transportation agencies to expand highways in ways that contradict other community goals. If they do nothing, at worst, traffic congestion will maintain equilibrium; people will manage within its constraints. Even better, transportation agencies can invest in resource-efficient alternatives—better walking, bicycling, public transit, and telework opportunities—that improve accessibility, increasing transportation system efficiency.

If we truly want to truly optimize our transportation systems, we need a more comprehensive analysis of impacts and options, including the full costs of urban highway expansions and the full benefits of non-auto mode improvements and TDM incentives. Highway expansion should be a solution of last resort, only implemented when all other solutions have failed and users are willing to pay the full costs through tolls.

It’s time to stop obsessing about congestion and instead strive for efficient accessibility that serves everybody in the community.

Source: A Serious Critique of Congestion Costs and Induced Vehicle Travel Impacts