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<br />Chokers at Intersections <br /> <br />Roadway Adjustments <br /> <br /> <br />~ <br /> <br />~ <br /> <br />Purpose <br />Narrowing of the street at an intersection <br />to constrain the width of the traveled way. They <br />provide shorter pedestrian crossing distances <br />and provide protection to the beginning of a <br />parking lane. The driver also senses the roadway <br />narrowing when approaching one of these <br />measures, which can result in speed reduction <br />and a reminder that the driver is entering a <br />residential area. <br /> <br />-<.'!::'----- <br /> <br />a;E!I;1!l..:---- <br /> <br /> <br />1!;l <br /> <br />~ <br /> <br />Source: Institute of Transportation Engineers <br />Traffic Calming: State of Practice <br /> <br />Effects <br />Volumes Little or no effect <br />Speed Minimal changes <br />Traffic Noise and Air Little or no effect. <br />Traffic Safety Potential for improved pedestrian safety due to shorter street crossing times, but <br /> at the same time bicycle safety may be compromised by physicaily removing part <br /> of the pavement surface. <br />Advantages . Good for pedestrians due to shorter crossing distance <br /> . Provides space for iandscaping and neighborhood "gateway" <br /> . Should not affect emergency response time <br /> . Minimal inconvenience to drivers <br />Disadvantages . May require the prohibition of on-street parking causing hardship or <br /> inconvenience for residents <br /> . May cause bicyclists to travel in same traffic lane as vehicles <br /> . May require redesign of drainage system <br />Problems Targeted . Mid-block locations with speeding and/or cut-through traffic <br />Design . There must be adequate turning radius for emergency vehicle access <br /> especially on narrow streets <br /> <br />APRIL 2005 <br /> <br />25 <br />