A warning sign on a construction site is sign that uses a distinct format to alert people of potential hazards.

Warning signs on construction sites come in many types:
- Beware of falling objects
- High voltage
- Slippery surface when wet
- Noise hazard
- Construction traffic
- Pinch point hazard (areas where body parts can be crushed)

Construction sites often contain various types of mandatory signs. Design-wise, they appear as a blue circle with white text displaying the instruction that needs to be adhered to. Unlike prohibited signs that restrict actions and warning signs that highlight dangers, mandatory signs focus on specific actions that must be taken for safety reasons.

A prohibited sign on a construction site is a specific type of safety signage that uses a universal format to clearly communicate actions or behaviors that are not allowed within the construction zone.Prohibition signs are red with a red line across the symbol, signalling danger and warning anybody not to proceed further.

Fire equipment signs on construction sites are a vital part of the overall fire safety strategy. These signs play a crucial role in directing people to the location of fire equipment in case of an emergency.

Safe condition signs on construction sites are like positive reinforcements in the safety signage system. Safe condition signs follow a globally recognized design. They consist of a green rectangle or square with a white symbol or pictogram, and sometimes additional text.