Final answer:
Signal at least 100 feet before turning left across traffic to inform other road users and enhance safety, with traffic signals further managing vehicle and pedestrian traffic flows.
Step-by-step explanation:
When preparing to turn left across oncoming traffic, it is essential to signal your intent to turn well in advance to inform other road users of your intended actions. While laws may vary by jurisdiction, a common recommendation is to turn on your left turn signal at least 100 feet ahead in city driving.
This allows other drivers and pedestrians to anticipate your movement and ensures everyone's safety. Not only does signalling reduce the likelihood of collisions, but it also enhances pedestrian safety, giving individuals on foot the signal they need to understand vehicle movements. For instance, a traffic signal installation demonstrates how it can effectively manage the flow of both vehicle and pedestrian traffic, enhancing safety for all. Signalling intentions and traffic signals are parts of broader traffic safety measures designed to protect everyone using the road.