The goal of NEMA TS 4-2016 is to provide the user with safe, dependable, functional, and easily maintained Dynamic Message Sign (DMS) equipment. NEMA TS 4-2016 defines the minimum hardware and functional characteristics of electronically controlled DMS used for displaying messages to travelers. NEMA TS 4-2016 predominantly addresses DMS. Conformance to NEMA TS 4-2016 is defined in Section 11. Portions of NEMA TS 4-2016 may be referenced as part of agency (procurement) specifications. NEMA TS 4-2016 is not intended to be, or is meant to take the place of any application guides for DMS. Items such as sign siting practices, selection of character heights, siting of cabinets and relations between legibility and travel speed, etc. were all considered to be outside the scope of NEMA TS 4-2016.