Final answer:
The question is about allowing drivers to make a protected or unprotected left turn. Traffic signals can be installed to regulate left turns and provide pedestrians with appropriate crossing times.
Step-by-step explanation:
The question is about allowing drivers to make a protected or unprotected left turn.
This topic falls under the subject of Social Studies as it involves traffic laws and regulations that affect drivers and pedestrians on the road.
In order to ensure pedestrian safety at intersections, traffic signals can be installed to regulate left turns and provide pedestrians with appropriate crossing times.