Does the MUTCD (Manual of Uniform Traffic Control Devices) refer to the ANSI/ISEA 107 standard?
Yes, in at least 2 places in the 2003 edition. Section 6D for worker safety and also 6E for flagger safety. The worker safety section requires a minimum ANSI-ISEA107 garment, chosen by a safety professional or competent person who would evaluate risks and hazards and then pick a garment that would best serve the safety of the workers. On the flagger standard the minimum is a Class II garment with flaggers working at night to consider a class III. Remember this is a minimum standard and other states and jurisdictions may require something additional. See this document for details: http://mutcd.fhwa.dot.gov/pdfs/2003/Ch6A-E.
