US PIRG and the Frontier Group released a report this week on driving trends, “A New Direction: Our Changing Relationship with Driving the Implications for America’s Future.” The report in its entirety is here but they’ve also released an infographic summarizing its results.

With a number of high profile (and high price tag) managed lane projects in the works throughout the region, it is an opportune time to reexamine their justification in light of this report. Largely conceived prior to the recent decline in vehicle travel, these projects are premised on growth, transportation and economic forecasts comparable to the infographic’s red curve. But what if our future looks more like one of the other curves? What if driving rates in 2025 haven’t reverted to those seen in 2005? A certain amount of uncertainty is inherent in any forecast, but the data from this report and elsewhere certainly suggest the need for robust due diligence before sinking hundreds of millions of taxpayer dollars into projects based on potentially outdated trends.
To this end, the Report makes a series of recommendations for approaching transportation policy decisions and project selection:
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Plan for uncertainty. With future driving patterns uncertain, federal, state and local transportation officials should evaluate the costs and benefits of all transportation projects based on several scenarios of future demand for driving. Decision-makers should also prioritize those projects that are most likely to deliver benefits under a range of future circumstances.
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Support the Millennials and other Americans in their desire to drive less. Federal, state and local policies should help create the conditions under which Americans can fulfill their desire to drive less. Increasing investments in public transportation, bicycling and pedestrian infrastructure and intercity rail—especially when coupled with regulatory changes to enable the development of walkable neighborhoods—can help provide more Americans with a broader range of transportation options.
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Revisit plans for new or expanded highways. Many highway projects currently awaiting funding were initially conceived of decades ago and proposed based on traffic projections made before the recent decline in driving. Local, state and federal governments should revisit the need for these “legacy projects” and ensure that proposals for new or expanded highways are still a priority in light of recent travel trends.
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Refocus the federal role. The federal government should adopt a more strategic role in transportation policy, focusing resources on key priorities (such as repair and maintenance of existing infrastructure and the expansion of transportation options) and evaluating projects competitively on the basis of their benefits to society.
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Use transportation revenue where it makes the most sense. Transportation spending decisions should be based on overall priorities and a rigorous evaluation of project costs and benefits—not on the source of the revenue.
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Do your homework. Federal and state governments should invest in research to evaluate the accuracy and usefulness of transportation models and better understand changing transportation trends in the post-Driving Boom era.



