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<br /> Limited visibility on approach to an intersection or roadway condition requiring <br />warning, as determined by the sight distance criteria for Warrant 1 in Section 9- <br />4.02.012 in the Traffic Engineering Manual. <br /> A history of crashes documented to be caused by a failure to stop or adherence to <br />warning, and deemed preventable by implementation of conspicuity improvements. <br /> <br />Speed Feedback Signs <br />These signs provide a real-time dynamic display of the driver’s vehicular speed at the <br />location where speeding and safety has been documented as a problem. When considering <br />use of these signs, at least four (4) of the following conditions must be met: <br />th <br /> The 85 percentile speed exceeds the posted speed limit by at least 5 MPH during <br />the time period of concern. <br /> A speed transition area exists. <br /> The area of interest is within the vicinity of a school or other high pedestrian traffic <br />area. <br /> The posted speed is 40 MPH or less. <br /> The road is under city jurisdiction. <br /> <br />Installation may be considered when three (3) of the above five (5) conditions are met, and <br />crash data and documented repeat lane departures can clearly be linked to excessive speed in <br />the area of interest. <br /> <br />Speed Feedback Signs shall also meet the following technical specifications when <br />implemented: <br /> Installation must be used in conjunction with the traditional speed limit sign. <br /> When activated, the sign display shall give drivers immediate feedback on their <br />individual driving speed. <br /> When traveling above the posted speed limit, the sign shall rapidly flash or have <br />other dynamic elements. <br /> When installed in association with school speed zones, the Speed Feedback Signs <br />shall operate only when the school speed zone is in effect. <br /> The installation shall not interfere with the visibility and general effectiveness of any <br />other signs in the area. <br /> <br />Rectangular Rapid Flashing Beacons (RRFBs) <br />RRFBs are user-actuated LEDs that supplement warning signs to increase awareness of a <br />pedestrian crossing location. They are activated by a push button which triggers the LEDs to <br />display an irregular flash pattern which can help alert drivers of the approaching crosswalk. <br /> <br />Prior to implementing RRFBs, the following conspicuity improvement alternatives shall first <br />be considered: <br /> Add crosswalk pavement markings. <br /> Install an advanced warning sign on approach to the crosswalk. <br /> Increase the size of the existing signage. <br /> Install a second sign of equal or lesser size on the left-hand side of the road (if <br />allowed by MN MUTCD). <br /> <br /> <br /> <br />3 <br />