Practices to Manage Traffic Sign Retroreflectivity (2012) / Chapter Skim
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Pages 22-26
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From page 22... ...
Throughout the creation process, the consultants solicited advice and feedback from its intended users. Clifton Park planned to use the computer-based system to manage its sign data for a combined expected sign life and blanket replacement approach.
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From page 23... ...
The visual nighttime inspection method was considered; however, it was decided that the county was not properly staffed to inspect such a large amount of roadway. The measured retroreflectivity method was also quickly rejected for a similar reason.
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From page 24... ...
It was agreed that the city needed to take additional action if it was going to meet the 2015 and 2018 compliance dates. At the time, the city did not have a functioning sign inventory system, but it did have detailed records of blanket replacements in each of the six regions.
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From page 25... ...
When the new retroreflectivity rules became official, MoDOT originally implemented a blanket replacement method as a means to address compliance. However, the department switched to visual nighttime inspections in late 2009/early 2010 because of the possible waste from early sign replacement that could occur and the desire to extend the sign service life of the signs as long as possible.
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From page 26... ...
Method review MoDOT has used both assessment and management methods to maintain its sign population. The visual nighttime inspection assesses sign retroreflectivity and confirms compliance with the MUTCD minimum levels.
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