Final answer:
Construction signs are temporary and convey messages to drivers about ongoing construction work, potential hazards, and changes in road conditions.
Step-by-step explanation:
In the context of road signs, 'construction signs are temporary', 'obey the signs for safety', and 'slow down' are common messages conveyed by construction signs.
These signs are typically used to alert drivers of ongoing construction work, potential hazards, and changes in road conditions.