Hi-vis clothing makes it easier for traffic to identify workers on roadside projects during day and night. Especially in the severe climate when the harsh climate is an issue. High-Visibility apparel decreases the danger of mishaps and improves the safety of the workers overall. 2. Coveralls bibs and trousers are made to protect the workers from chemical, biological, mechanical, thermal, electromagnetic, and electrical hazards. Coveralls are created for high-level protection in risky work environments to protect the employees and workers.