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                        Lighting and Nighttime Visibility


            
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                IMPLEMENTATION TOOLS – SIGN RETROREFLECTIVITY SIGN RETROREFLECTIVITY METHODS TABLE
    

    
    
          Summary of Sign Retroreflectivity Maintenance Methods

A method must be
			implemented and in use
			by January 2014
			EQUIPMENT
			NEEDS
			INSPECTOR REQMTS
			TIME DEMANDSRetro-
			reflectometer
			Inspection Vehicle
			Must Know
			Sheet Type
			Inventory
			Trained
			Age
			At Night
			Must Stop
			At SignsASSESSMENT
			METHODS
			Select Any 1 of These 3Visual Procedures
			Calibration Signs
			Photo: Street Signs, Unleveled Pavement, Yield Sign, Predestrain Crossing Sign
			
			**Any**
			
			**(1)**
			✔
			**Any**
			✔Comparison Panels
			Image: Partial Warning Sign
			
			**Any**
			
			**(1)**
			✔
			**Any**
			✔
			**Only
			✔ Marginal Signs**Consistent Parameters
			Photo: Workers in Car
			
			**PU
			or
			SUV**
			
			**(1)**
			✔
			**60+**
			✔Measured Retro
			Photo: Measured Retro device
			✔
			
			✔
			**(1)**
			**(2)**
			**Any**
			
			**✔****Every Signs**MANAGEMENT METHODS
			Expected Sign Life
			Line Chart: Green Slant Downward Arrow, Orange Bar at lower line of chart
			
			
			✔
			**(1)**Blanket Replacement
			Map: Divided by 6 areas
			
			
			✔
			**(1)**Control Signs
			Image: Control Sign
			**To Check Control Signs**
			
			✔
			**(1)**
			**(2)**
			
			
			**Only
			✔ Marginal Signs**(1) Not required in MUTCD, but might be beneficial
(2) Need training on operation of retroreflectometer
✔ Means "required"
              
      
    
          Last updated: Wednesday, February 1, 2017 U.S. DEPARTMENT OF TRANSPORTATION

**Federal Highway Administration**

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WASHINGTON, DC 20590

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