Final answer:
The sign depicted in the question is a triangle with a downward-facing arrow and the text 'Steep Downgrade.' It is used to indicate a section of road that has a significant slope or incline.
Step-by-step explanation:
The sign depicted in the question is a triangle with a downward-facing arrow and the text 'Steep Downgrade.'
It is typically used to indicate a section of road that has a significant slope or incline.
When driving on a steep downgrade, it is important for motorists to use caution and control their speed to avoid accidents.
This sign is commonly seen on mountainous or hilly roads where there are sharp grade changes.