OSHA standards require such employees to wear high visibility garments in two specific circumstances: when they work as flaggers (1) and when they are exposed to public vehicular traffic in the vicinity of excavations (2). However, other construction workers in highway/road construction work zones are also exposed to the danger of being struck by the vehicles operating near them. for such workers, section 5(a)(1) of the OSH Act, 29 U.S.C. §654(a)(1), also known as the General Duty Clause, requires similar protection.\r\rThe Federal Highway Administration's (FHWA) recent issuance of a final rule (Worker Visibility, 23 CFR Part 634)4 demonstrates the need for all workers who are exposed either to public traffic or to construction vehicles and equipment to wear high-visibility apparel5. Section 634.3 of the Worker Visibility Rule states: All workers within the right-of-way of a Federal-aid highway who are exposed either to traffic (vehicles using the highway for purposes of travel) or to construction equipment within the work area shall wear high-visibility safety apparel. Source: OSHA.