Do your employees work near vehicular traffic? Then they must wear high visibility clothing so that they can be seen by motorists. The ANSI/ISEA 107-2004 standard is the first uniform, authoritative guide for the design, performance specifications, and use of high-visibility and reflective clothing for employees. This standard was modeled after the European standard EN471 by ANSI (American National Standards Institute) and ISEA (International Safety Equipment Association).

The Occupational Safety and Health Administration has recently taken a greater interest in high visibility clothing and the work situations in which it should be worn. There have been organizations that have already been cited under 29CFR 1910.132 for not having their workers wear clothing that ensured their conspicuity and/or visibility. In the citations, OSHA named compliance with the ANSI/ISEA 107-2004 standard for high-visibility safety clothing as a method to ensure visibility of workers from all directions under adverse lighting conditions.

Nighttime construction has heightened the probability that workers will be struck by a motor vehicle. Crews working between 6 p.m. and 6 a.m. are three times more likely to be struck, and 25% of all fatal accidents occur during this time period.