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<br />Traffic Control Devices <br /> <br />Turn Restrictions <br /> <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 /> <br />~ <br /> <br />(S)! <br /> <br />~~ <br /> <br />R3-1 <br /> <br />R3-2 <br /> <br />R3-3 <br /> <br />Source: FHWA Manual on Uniform Traffic Control Devices <br /> <br />Effects <br />Volumes Where turning movements onto local residential streets are reduced, volumes on <br /> those streets are lessened. <br />Speed To the extent that traffic cutting through is diverted, speeds on the local <br /> residential street may be reduced. <br />Traffic NoIse and Air Noise may be reduced, but transferred to other streets <br />Traffic Safety May improve on the restricted volume street if compliance is high, but effects on <br /> alternative routes need to be evaluated. <br />Advantages . Low installation cost <br /> . Possible reduction in crashes <br />Disadvantages . 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 . Cut through traffic <br />Design . 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 /> <br />APRIL 2005 <br /> <br />14 <br />