Jeff Speck Design #1: The 3-to-2 Road Diet

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A collaboration between city planner, urban designer, and author Jeff Speck (, and 3D artist Spencer Boomhower (, this series of videos describes some of the most common and most effective road-diet redesigns.


“Many one-way streets have an extra lane that can be traded for a cycle track by pulling a flank of parking off the curb. Ten feet is all you need, as the parking lane can be made quite narrow. Such a change, on Prospect Park West in Brooklyn, reduced speeding by 77%, and reduced injury crashes by 63 %, while having no impact on car volume or travel times.”

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