Summary of Sign Retroreflectivity Maintenance Methods

A method must be implemented and in use by January 2014				EQUIPMENT NEEDS				INSPECTOR REQMTS		TIME DEMANDS
				Retro- reflectometer	Inspection Vehicle	Must Know Sheet Type	Inventory	Trained	Age	At Night	Must Stop At Signs
ASSESSMENT METHODS	Select Any 1 of These 3Visual Procedures	Calibration Signs			Any		(1)	✔	Any	✔
		Comparison Panels			Any		(1)	✔	Any	✔	Only ✔ Marginal Signs
		Consistent Parameters			PU or SUV		(1)	✔	60+	✔
	Measured Retro			✔		✔	(1)	(2)	Any		✔ Every Signs
MANAGEMENT METHODS	Expected Sign Life					✔	(1)
	Blanket Replacement					✔	(1)
	Control Signs			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"