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<br />Roadway Adjustments <br /> <br />Mid-Block Narrowing <br /> <br />~l:O <br /> <br />Purpose <br />Segment(s) of roadway narrowing where curbs <br />are extended toward the center of the roadway <br />on one or both sides of the street to constrain the <br />width of the traveled way. They provide shorter <br />pedestrian crossing distances and provide protection <br />to the beginning of a parking lane. The driver also <br />senses the roadway narrowing when approaching <br />one of these measures, which can result in speed <br />reduction. <br /> <br />~=. '::"':~T,:r.'-""""'F <br />t:ll:lD ~ <br />----------------~-R_I~- <br /> <br />-<f-~U"r1~~~,~(~-~ <br /> <br /> <br />~trt5 <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 physically removing part <br /> of the pavement surface. <br />Advantages . Good for pedestrians due to shorter crossing distance <br /> . Provides space for landscaping <br /> . Does 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 create drainage issues where curb and gutter exist <br /> . May create diversion for bicyclists <br />Problems Targeted. . Mid-block locations with speeding and/or cut-through traffic <br />Design . Must not significantly impede emergency vehicle access <br /> <br />APRIL 2005 <br /> <br />26 <br />