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Effects <br />Volumes <br />Speed <br />Traffic Noise and Air <br />Traffic Safety <br />Where turning movements onto local residential streets are reduced, volumes on <br />those streets are lessened. <br />To the extent that traffic cutting through is diverted, speeds on the local <br />residential street may be reduced. <br />Noise may be reduced, but transferred to other streets <br />May improve on the restricted volume street if compliance is high, but effects on <br />alternative routes need to be evaluated. <br />Advantages <br />Low installation cost <br />Possible reduction in crashes <br />Disadvantages <br />If turn prohibition sign is installed without a reasonable alternative violations are <br />likely. <br />Complaints may rise on diversion routes. <br />Turn prohibition signs have a very low level of effectiveness unless coordinated <br />levels of enforcement are high. <br />Problems Targeted <br />Cut through traffic <br />Design <br />Turn restriction signs should be used on the periphery of neighborhoods rather <br />than within them. <br />Most effective when used during rush hour when "cut through" traffic is a <br />problem <br />Consideration should be given to install physical barriers to aid in the <br />enforcement of tum restriction signs <br />Traffic Control Devices <br />Turn Restrictions <br />Purpose <br />Can be used in neighborhoods where "cut <br />through" traffic has been documented to be <br />unusually high. Traffic control technique <br />involving the use of regulatory signing which <br />prohibits certain traffic movements generally <br />where an arterial and local street meet. <br />Involve the use of standard "No Right Turn" <br />or "No Left Turn" sign with or without rush <br />hours limitations. <br />APRIL 2005 <br />NO <br />TURNS <br />R3•1 R3-2 R3-3 <br />Source: FHWA Manual on Uniform Traffic Control Devices <br />14 <br />