Answer :
Final answer:
A diamond-shaped sign warns drivers that a divided highway is beginning, signaling the need to be alert for the road split and oncoming traffic.
Explanation:
The shape of a sign that warns you a divided highway is beginning is typically a diamond. This sign usually features an image of a highway with a divider, indicating that the road ahead splits into two separate directions.
It is crucial for drivers to recognize this sign as it informs about the changing road layout, requiring them to adjust their driving accordingly and watch for oncoming traffic in the newly-formed opposite lanes.
