This sign means:

A divided highway ends.
A one-way street begins.
A one-way street ends.
A divided highway begins.
The Correct Answer and Explanation is :
The sign you are referring to indicates that a divided highway begins. This means that drivers are about to enter a section of the road where there is a physical barrier or median separating traffic moving in opposite directions.
Divided highways are designed to improve safety by reducing head-on collisions. They typically have barriers such as concrete dividers or wide medians to separate the flow of traffic. This sign serves to alert drivers that the road they are on is about to change, with lanes separated by a barrier.
When you encounter a “divided highway begins” sign, it is important to stay in your lane and be mindful of the road changes ahead. The opposite of this sign, indicating that a divided highway ends, would typically feature a sign showing the division ending, and traffic lanes will merge into one, requiring more cautious driving.
This type of sign is common in areas where high-speed traffic is expected, such as highways or major roads leading to cities.