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Variable Speed Display Board <br />Enforcement <br />Purpose <br />A portable speed display board wired to a radar provides <br />passing motorists their travel speed along with the speed <br />limit. The display can help raise driver awareness, <br />encourage compliance, and direct driver’s attention to the <br />posted speed limit. The purpose is to remind drivers that <br />they are speeding to help encourage compliance. <br />Effects <br />Volumes <br />Little or no effect <br />Speed <br />Lower observed speeds when device is present <br />Traffic Noise and Air <br />Little or no effect <br />Traffic Safety <br />There is the potential for sudden braking by some motorists. <br />Advantages <br />• Portable Display board can be used in various locations enabling residents <br />to borrow and placeon their street. <br />• Low cost ($2,000 to $11,500 per unit). <br />• Can be used to target timing and location of police enforcement (if data <br />shows excessive speeds at a certain time). <br />Disadvantages <br />• Possible concerns with causing conflict between citizens involved <br />(vigilantism). <br />• May only provide short term effectiveness. <br />• Possible vandalism or could encourage aggressive drivers to see how fast <br />they can go. <br />• Needs power to function. <br />• Requires personnel to move and place unit. <br />Problems Targeted <br />• Any location where speeding is a problem or where drivers need to be <br />educated about traffic issues in the area. <br />Design <br />• Variety of types of variable speed display boards available – some include <br />traffic countingabilities. <br /> <br />