The Triple Convergence

The “triple convergence” informs us that whenever we create an oversized road (and there are several in Boulder), or add a turn lane to enlarge an intersection, we inevitably induce three motorist behavior changes that result in a quick return to congested road conditions: Motorists drive more often at rush hour, they drive more often by car, and they drive more often on the newly-widened road or intersection. The widening of a road (or intersection) thereby induces new car trips that would have never occurred had Boulder not spent large sums of public dollars to build an oversized road or intersection.

About Dom Nozzi

Urban designer, Complete Streets instructor, smart growth specialist, town planner, walkable streets and bikeable streets and trails specialist, writer, editor, public speaker, world adventurer, skier, kayaker, SCUBA diver, bicyclist, hiker, dancer, book reader, cook, urbanist.
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