Final answer:
Orange, diamond-shaped signs are posted in work zones to give advance warning of lane closings, construction areas, and workers ahead.
Step-by-step explanation:
The type of sign that is posted in a work zone to give advance warning of lane closings, construction areas, and workers ahead is orange, diamond-shaped signs. These signs are specifically designed to alert drivers to the presence of construction zones and potential hazards on the road. They are easily recognizable and serve as an important safety measure for both drivers and workers in these areas.