b1b4170c_cal_Agencies___FHWA_HRT_07_042__Reported_Impacts
[Agency/Location] North Carolina DOT (11) [Comments] The report contains a good summary of information on sign inventory and management systems. A lot of options considered in the development of NCDOT strategy. Useful critiques of estimating tools. Good long-term life-cycle cost analyses. [Implications] Recommendations suggest a large impact on the State, but the bulk of the costs are associated with putting a comprehensive SIMS in place. Less than 10% of their signs estimated to need replacement. [Reported Impacts] 
The agency undertook an extensive analysis of current sign practices and options available. It was estimated that there are over 3.2 million signs on the streets and highways in the States. Estimates of sign condition were generated from sample studies. Less than 10% of the State’s signs were believed to be below the minimum levels. The State already conducts regular night sign inspections. After considering a broad range of alternatives, it was recommended that the State undertake a comprehensive sign inventory and develop a full-function SIMS. Price over $4 million.
Maintaining Traffic Sign Retroreflectivity: Impacts on State and Local Agencies - FHWA-HRT-07-042