Restricted Access Sign - Safety Warning for Construction and Hazard Zones #21557 (License: Personal Use)

The image displays a standardized prohibition sign featuring a bold red circle with a diagonal slash over a black silhouette of a hand halting a figure wearing a hard hat. This visual communicates strict access control in environments like construction sites, chemical plants, or confined spaces where PPE is mandatory. The design follows ISO 3864-1 safety signage conventions for maximum clarity and international recognition.

Commonly used on site entrances, barriers, or equipment to warn against unauthorized entry; matches user intent for safety compliance, OSHA/ISO standards reference, or workplace hazard communication materials.