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Fraffic Control Devices 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 />0 ® <br />TURNNO <br />S <br />113-1 R3 -2 fill <br />Source FHWA Manual on Unifovn Traffic Control Devices <br />Effects <br />Volumes <br />Where turning movements onto local residential streets are reduced, volumes on <br />those streets are lessened. <br />Speed <br />To the extent that traffic cutting through is diverted, speeds on the local <br />residential street may be reduced. <br />Traffic Noise and Air <br />Noise may be reduced, but transferred to other streets <br />Traffic Safety <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 />• Iftum 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 turn restriction signs <br />APRIL 2005 <br />