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<br />II Vertical Elements <br /> <br />Purpose <br />A physical means for preventing left turning traffic on <br />a major street from accessing a local street and <br />through traffic from continuing on that local street. <br />Alternate routes fro diverted traffic should be <br />analyzed with regard to traffic carrying capacity and <br />desirability. <br /> <br />Median Barrier II <br /> <br />~u <br /> <br />~ <br /> <br /> <br />~ <br /> <br />""" <br />------.-- <br /> <br /> <br />13 <br /> <br /> <br />Source: Institute of Transportalion Engineers <br />Traffic Calming: State of Practice <br /> <br />Effects <br />Volumes Vary depending on proportion of traffic that is prohibited by the median barrier <br />Speed Small reduction possible <br />Traffic Noise and Air Little or no effect <br />Traffic Safety May provide some safety benefits for pedestrians as a safety island for crossing <br /> the major street <br />Advantages . Assists in pedestrian crossing <br /> . Prevents vehicles from passing vehicles that are turning right <br /> . May improve safety through access limitations <br /> . Visually enhances the street <br />Disadvantages . Diversion of traffic to other locations possible <br /> . Disrupts continuity of local street system <br /> . Maintenance of island required <br /> . Reduction in access for residents <br />Problems Targeted . Cut through traffic <br /> . Vehicle conflicts <br />Design . Must meet drainage requirements <br /> . Must not signiflcantly impede emergency vehicle access <br /> <br />APRIL 2005 <br /> <br />31 <br />