Final answer:
A left turn on red is typically permitted from a one-way street onto another one-way street, unless signage indicates otherwise. Traffic signals contribute to pedestrian safety and traffic calming, which must be considered at all intersections.
Step-by-step explanation:
The question relates to traffic laws, specifically about when a left turn on red is permitted. In many jurisdictions, a left turn on red is only permitted in specific circumstances. Typically, one of these circumstances is when a driver is turning from a one-way street onto another one-way street.
This rule is in place to help ease congestion and facilitate smoother traffic flow, assuming that drivers take appropriate care and give right-of-way to other road users and pedestrians. However, signs posted at an intersection always take precedence over general rules. If the signs at an intersection do not permit a left turn on red, or conditions don't allow for a safe turn, it is important to follow the signposted regulations and prioritize road safety.
Pedestrian safety is a significant concern at intersections, and a traffic signal may be installed to allow them to cross at appropriate times, reducing the need to dodge traffic. This is also relevant to the initial question, as the presence of a signal would naturally impact the legality of a left turn on red.
Additionally, traffic signals can play a critical role in calming traffic and making sure vehicles adhere to the speed limit, contributing to the overall safety of an intersection. Understanding and obeying these rules is essential for both pedestrian and vehicular safety.
Therefore the correct option is c. from a one way road to a one way road.