Prohibitory signs inform drivers that they should not to a specific behaviour.

General specifications:

- In aluminum or zinc plated steel sheet;
- Reflective sheeting - 3, 7, 10 or 15 years;
- Edge - single or double;
- Thickness -1, 1.5 or 2 mm.

Milimeter dimensions, without border (diameter):
600; 700; 900; 1150.