Clearly define dangerous areas such as construction zones and welding areas to restrict access to only authorized personnel.

Alert workers to the presence of chemicals, combustible liquids and gases, and other hazardous materials.

Notify workers of electrical hazards such as arc flashes, buried cable, and high-voltage equipment.

Communicate dangers to workers near moving equipment that could cause injury.

These signs can be read when viewed in a rearview mirror.

Identify confined spaces that require authorized permit-only entry.

These signs have a handle for guiding pedestrians and vehicle traffic manually.

Communicate hand signals for directing crane operation.