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Michael J. Cunneen April 2009

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The Traffic Calming Movement’s Crusade Against One-Way Streets The Evidence from the Past on One-Way Streets The Evidence from Recent Studies on One- Way Streets Recent Evidence from Downtown Albuquerque, New Mexico Misconceptions Regarding One-Way Street Conversions

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Converting Two-Way to One-Way Portland, Oregon, 1959: Weighted average traffic accident rate 24% Weighted average pedestrian accident rate 38%

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New York City, 1966: Accident rates 38% Overall accident injuries 28 % Traffic volume & speed London, England, 1987: Accident rates 40 % Speed Converting Two-Way to One-Way

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Hamilton, Ontario, : Accident rates 17% Modesto, California, 1957: Pedestrian injuries 57% Accident rates 10% Speed 100 % Converting Two-Way to One-Way

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Denver, Colorado, 1986: Intersection accident rates 37.6% Mid-block accident rates 80.5% Lubbock, Texas, 1995: Accident rates 41.6% Speed 100% Converting One-Way to Two-Way

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Component of Change ConditionChange BeforeAfterNumberPercent Volume30,90035,600+3, % Average Speed % 85th % Speed % Total Accidents % Total Accident Rate % Pedestrian Accidents % Ped Accident Rate % Intersection Accidents % Int Accident Rate % Midblock Accidents % Midblock Accident Rate % Converting One-Way to Two-Way

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Component of Change ConditionChange BeforeAfterNumberPercent Volume24,52028,025+3, % Average SpeedN/A Total Accidents % Total Accident Rate % Pedestrian Accidents % Ped Accident Rate % Intersection Accidents % Int Accident Rate % Midblock Accidents % Midblock Accident Rate % Converting Two-Way to One-Way

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Component of Change ConditionChange BeforeAfterNumberPercent Volume359,430284,180-75, % Total Accidents % Total Accident Rate % Pedestrian Accidents % Ped Accident Rate % Bicycle Accidents % Bike Accident Rate % Converting One-Way to Two-Way

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General Safety Speed and Safety Why One-Way is Safer for Vehicles Why One-Way is Safer for Pedestrians and Bicyclists Speed and Severity of Accidents

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The Quack “Public Health” Case Against One-Way Why One-Way Does Not Lead to Longer Trips Why One-Way is Better for the Environment Why Traffic Calmers Don’t “Get It” About One-Way Streets What Can be Done to Promote One-Way Streets

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“… extend the use of one-way streets to cover all streets … to have safe and convenient conditions for pedestrians” as “ one-way streets help the pedestrian to an extraordinary extent” such that “The one- way operation of roads will insure a large measure of safety for pedestrians crossing at any point”.

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“The advocacy of the universal use of one- way streets is the most fundamental suggestion embodied in this book … there does not appear to be any important reason why streets in cities should be operated upon the two-way principle”.

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“The best solution would extend the use of one-way streets to cover all streets … from a safety standpoint then, this is the most logical reason for adoption of one-way method”. and “Safety considerations … Are wholly in favor of the one-way idea”.

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