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We found 14 certification(s) from 5 organization(s) for Highway Maintenance Workers.

Certification Name	Certifying Organization	Type
Traffic Signal Operations Specialist (TSOS)	Transportation Professional Certification Board, Inc.	Specialty
Roadway Lighting Technician Level I	International Municipal Signal Association	Core
Highway Construction Inspection	National Institute for Certification in Engineering Technologies	Core
Mobile Crane Operator Certification	National Center for Construction Education and Research	Core
Certified Guardrail Installer (GI)	American Traffic Safety Services Association	Core
SIGNS SENIOR TECHNICIAN LEVEL III	International Municipal Signal Association	Advanced
Flagger Instructor Training (FIT)	American Traffic Safety Services Association	Core
Certification in Construction Materials Testing - Concrete Level I	National Institute for Certification in Engineering Technologies	Core
Certification in Construction Materials Testing - Asphalt	National Institute for Certification in Engineering Technologies	Core
Signs & Pavement Markings Technician Level I	International Municipal Signal Association	Core