No Entry Sign - Meaning, Usage, and Traffic Regulation Guide #3400678 (License: Personal Use)

This is the internationally recognized “No Entry” traffic sign (often designated as R1-1 in the U.S. MUTCD or sign 251 in the UK). It features a bold red circular border with a solid white horizontal bar centered inside, signaling that vehicles are prohibited from entering the roadway ahead. The sign is typically placed at the entrance of one-way streets, restricted zones, or dead-end roads to prevent dangerous or illegal access.

Commonly used by transportation authorities at road entrances, intersections, or private property access points; matches user intent for understanding traffic signage, driving test preparation, road safety education, or municipal compliance guidance.