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Effects <br />Volumes <br />Speed <br />Traffic Noise and Air <br />Traffic Safety <br />Possible reduction in volumes <br />Possible reduction in speeds <br />Little to no effect <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 (22 feet is appropriate width) <br />Roadway Adjustments <br />Chicane <br />Purpose <br />Curvilinear reconstruction involving the <br />introduction of curvatures on previously <br />straight alignment. Curvilinear <br />reconstruction can be accomplished in two <br />different ways: <br />1. Reconstruct the street with a <br />curved centerline alignment and a <br />uniform roadway width <br />2. Introduce chokers or other types of <br />barriers on alternate sides of the <br />street to create a serpentine travel <br />path. <br />APRIL 2005 <br />Source: Institute of Transportation Engineers Traffic Calming: State of <br />Practice <br />27 <br />