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Traffic Sign Maintenance/Management Handbook, Report No. 2010RIC10, Version 1.1, Minnesota Department of Transportation (October 2010). LMCIT Sign Retroreflectivity Memo and Model Policy, League of Minnesota Cities Final Edition, March 2014). Article IV. Sign Inventory To meet the City's goal of maintaining sign retroreflectivity above certain levels, the City will maintain a sign inventory of all new or replacement signs installed after the effective date of this policy. The inventory shall indicate the type of sign, the location of the sign, the date of installation or replacement, the type of sheeting material used on the sign face, the expected life of the sign, and any maintenance performed on the sign. As to existing signs, the City will perform an inventory of all signs covered by this policy. The City recognizes this process will occur over time subject to the City's monetary and human resources. The City expects to complete its sign inventory by December 31, 2015. The City shall record the above information related to new signs to the extent that such information is known and shall also include a statement on the general condition of the sign. Article V. Removal of Signs In recognition of the fact that excess road signs have been shown to reduce the effectiveness of signage, as well as impose an unnecessary financial burden on road authorities, it is the City's policy to remove signs determined to be unnecessary for safety purposes and which are not required to comply with an applicable state or federal statue or regulation. The removal of signs shall be based on an engineering study and the MN MUTCD. Article VI. Approved Sign Evaluation Method After reviewing the various methods proposed for sign maintenance, the City adopts one or more of the following methods to meet the minimum sign retroreflectivity requirements in the MN MUTCD: Check one or more of the boxes that apply; for example, a city might choose Nighttime Visual Inspection and Expected Sign Life] Nighttime Visual Inspection. The retroreflectivity of the City's signs is assessed by a trained sign inspector following a formal visual inspection procedure from a moving vehicle during nighttime conditions. Signs that are visually identified by the inspector to have retroreflectivity below the minimum levels will be replaced. The City will visually inspect its signs based on the following schedule: Describe how often the City will visually inspect signs. For example, the City