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46 <br /> <br />Traffic Circles <br />Traffic circles are circular, raised center islands at the intersection of two neighborhood <br />streets intended to slow vehicle approach speeds by impeding the straight-through <br />movement. These are common treatments along streets designated as bike boulevards. <br /> <br />Guidance <br />• Unlike roundabouts, traffic circles are intended for the intersections of low-volume <br />streets, commonly in residential neighborhoods. Therefore, deflection on approach <br />legs is typically not used since vehicle speeds should already be 25 mph or less. <br />• Pavement markings should indicate priority for pedestrians at crossings and provide <br />wayfinding guidance for bicyclists. <br />• The traffic circle’s diameter should be great enough to establish horizontal <br />deflection for vehicles travelling through the intersection, thereby achieving the <br />intended traffic calming intent. <br />• Design the circles to be visible at night with reflective materials and ensure <br />adequate street lighting exists. <br />Considerations <br />• To accommodate garbage trucks and emergency vehicles, design to allow left turns <br />in front of the circle.