Stop Sign
Octagonal red traffic sign requiring vehicles to come to a complete stop.
International · 1915 – present
ISO
ISO develops and publishes international standards covering almost every industry. ISO 7010 specifically governs safety signs.
11 symbols in this standard
Yield Sign (Give Way)
Triangular traffic sign requiring drivers to yield right-of-way.
International · 1950 – present
No Entry
Circular red sign prohibiting entry to a road or area.
International · 1968 – present
Pedestrian Crossing
Warning sign indicating a pedestrian crossing ahead.
International · c. 1930 – present
Skull and Crossbones
Universal symbol for poison, toxic substances, and mortal danger.
International · c. 1400 CE – present
Biohazard Symbol
Symbol warning of biological substances that pose a threat to living organisms.
International · 1966 – present
Radiation Warning Symbol (Trefoil)
International symbol warning of ionizing radiation hazards.
International · 1946 – present
High Voltage Warning
Warning symbol indicating the presence of high-voltage electrical hazards.
International · c. 1970 – present
Emergency Exit (Running Man)
ISO 7010 safety sign indicating the direction of emergency exits.
International · 1979 – present
Degree Celsius (°C)
Unit symbol for temperature in the Celsius scale.
International · 1742 – present
Universal Recycling Symbol
International symbol indicating recyclable materials or recycling facilities.
International · 1970 – present