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One-Way Streets <br />Traffic Control Devices <br />Purpose <br />Conversion of two-way streets to one-way operation <br />for purposes of residential street traffic control take <br />three forms: <br />CASE #1 - Divergent and convergent one-way <br />residential streets to reduce direct through <br />routes impacting the neighborhood. <br />CASE #2 - Alternating one-way streets throughout a <br />portion of a grid system to gain safety <br />advantages of one-way operations. <br />CASE #3 - Creating a one-way couplet by paring a <br />residential street with a nearby thru streetto <br />create a corridor for thru traffic <br />Source: FHWA Manual on Uniform Traffic Control Devices <br />Effects <br />Volumes <br />Case #1 – reduces traffic volumes where thru traffic is a problem <br />Case #2 – no significant effect on traffic volumes <br />Case #3 – increases volumes on one street and reduces volumes on <br />adjacent streets <br />Speed <br />May increase speedsdue to improved motorist comfort levels. <br />Traffic Noise and Air <br />Minimal effect except in Case #1 which creates longer, circuitous routes for <br /> <br />localtraffic. <br />Traffic Safety <br />One-way streets result in fewer potential conflicting movements, improving <br />safety. <br />Advantages <br />• Possible increased parking <br />• Inexpensive to implement <br />• May reduce traffic volumes <br />• May increase roadway capacity <br />Disadvantages <br />• May be considered inconvenient for residents <br />• Possible increase in speeds <br />• May increase volumes on other streets <br />Problems Targeted <br />• High traffic volumes <br />• High crashes due to conflicting movements <br />Design <br />• One way streets can be used in combinations that force turns every few <br />blocksto minimize speeding or cut-through problems <br /> <br />