Colorado Revised Statutes Title 43 Transportation § 43-5-308 Flagpersons–definition
(2)(a) Only a trained person may provide temporary traffic control or direction within any highway, road, or street maintenance or construction work area as a flagperson.
(b) The department shall authorize public and private entities to conduct flagperson certification training and shall develop and provide, at cost, examination and training materials that authorized entities must use in conducting flagperson certification.
(c) While directing traffic, a flagperson shall wear high-visibility garments and display an official hand signal device prescribed in the state traffic control manual adopted by the department pursuant to section 42-4-104, C.R.S ., or its supplement.
(d) A flagperson shall abide by the Colorado manual of uniform traffic control devices and shall not use any device that might distract the flagperson’s vision, hearing, or attention while directing traffic.
(3) As used in this section, “flagperson” means a person:
(a) Eighteen years of age or older;
(b) Trained by an entity authorized by the department;
(c) Employed by the department, a department contractor, a political subdivision of the state, or a contractor of a political subdivision; and
(d) Acting in his or her official capacity while performing work within a temporary traffic control zone.
All flaggers on CDOT projects must possess a Flagger’s Certification Card in accordance with the Standard Specifications. Specifications require that all flaggers on CDOT projects be properly certified, having successfully passed the Department’s minimum training requirements within two years of starting work on the project. Note that CDOT does not certify non-CDOT employees for flagging duties. The certification requirements include reviewing the latest edition of the CDOT Flagger’s Training Manual, viewing a flagger training video, and obtaining a passing score of at least 85 percent on a Flagger Proficiency Test, which must be administered by a Registered Flagger Proctoring Agency.”
Check out CDOT’s Flagger Program for more information about flagger certification.