Final answer:
To make a turn, a driver should signal at least 100 feet before the turn in urban areas and even earlier on highways. Traffic signals, where present, provide a clear indication of when it is safe for pedestrians to cross, enhancing pedestrian safety.
Step-by-step explanation:
When planning to make a turn, it is important to signal to inform other road users of your intention. The specific distance at which a driver should signal before making a turn can vary by jurisdiction, but a common rule of thumb is to signal at least 100 feet before the turn, especially in urban or residential areas.
On highways or at higher speeds, signaling earlier is often advisable. As a general safety guideline, signaling well in advance not only helps in preventing accidents but also in maintaining traffic flow and ensuring pedestrian safety.
Regarding the safe distance to cross, a traffic signal would indicate when it is safe to cross the street. Without traffic signals, assessing a safe distance can depend on various factors such as the speed of the vehicles, sight distance, and the width of the roadway. It may be measured in car-lengths, but an exact number is subjective and will vary based on the specific conditions of the roadway and traffic.