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Chicane <br />Roadway Adjustments <br />Purpose <br />Curvilinear reconstruction involving the <br />introduction of curvatures on previously straight <br />alignment. Curvilinear reconstruction can be <br />accomplished in two different ways: <br />1.Reconstruct the street with a curved <br />centerline alignment and a uniform <br />roadway width. <br />2.Introduce chokers or other types of barriers <br />on alternate sides of the street to create a <br />serpentine travel path. <br />Source: Institute of Transportation Engineers <br />Traffic Calming: State of Practice <br />Effects <br />Volumes <br />Possible reduction in volumes. <br />Speed <br />Possible reduction in speeds. <br />Traffic Noise and Air <br />Little to no effect. <br />Traffic Safety <br />Little or no effect. <br />Advantages <br />• Possible reduction in volumes and speed. <br />• No restriction in access to residents. <br />• Can be landscaped enhanced. <br />• Less disruptive for emergency vehicles than speed humps. <br />Disadvantages <br />• Curbside parking must be prohibited in some locations. <br />• Winter maintenance problems. <br />• Possible impacts to drainage. <br />• High cost of reconstruction. <br />Problems Targeted <br />• Excessive speeds. <br />Design <br />• Not appropriate for narrow streets (24 feet is appropriate width). <br />•Drainage structures must be relocated to fit into new curb line. <br /> <br />