Full Breakdown
DOT Secretary Sean Duffy Targets Bike Lanes, Citing Congestion Concerns
8/11/2026, 9:17:03 PM
Duffy’s Proposal to Target Bike Lanes
Department of Transportation (DOT) Secretary Sean Duffy sent a July 22 letter to congressional leaders outlining the Trump administration’s priorities for reauthorizing surface-transportation funding. The letter calls for cutting federal financial support for state and local biking infrastructure and for removing existing bike lanes, including a protected lane on Washington, D.C.’s 15th Street. Duffy’s rationale is that bike lanes “sacrifice vehicle throughput,” leading to longer travel times and wasted fuel.
Research Contradicting the Proposal
Urban Institute land-use researcher Yonah Freemark notes that a large body of scholarship shows adding car lanes does not solve congestion; instead, it attracts more drivers and can worsen traffic. This phenomenon, known as “induced demand,” has been documented since the mid-20th century.
Official Statements and Criticism
Former DOT safety official Barbara McCann (DOT employee 2014-2021) argues Duffy’s comments are aimed at a narrow audience and do not align with the agency’s core safety mission. By contrast, former DOT Secretary Pete Buttigieg and President Joe Biden have emphasized that bike lanes improve safety for all road users and advance equity for historically disadvantaged communities.
Traffic Impact Data from Washington, D.C.
The District Department of Transportation reports that after the protected bike lane on 15th Street opened, vehicle speeds in both directions rose by at least 23 % during peak morning hours (2018-2026). Evening speeds also increased, and total traffic crashes fell by 46 %. The Trump administration’s attempt to dismantle a protected lane along the National Mall was halted by a federal court, and the legal challenge remains pending.
Verbatim Quotes
- “There is a huge amount of scholarship demonstrating that if you add car lanes, you do not solve the congestion problem, but rather attract more drivers who sit in the same amount of congestion if not more congestion that they experienced before,” — Yonah Freemark
These points illustrate the clash between the administration’s congestion narrative and existing research and empirical evidence showing that bike lanes can coexist with, or even improve, traffic flow and safety.
