Final answer:
The requirement to signal before turning is tied to traffic laws and the road's speed limit. While an exact speed limit is not specified, for any speed, signaling early, especially when traveling at higher speeds, is essential for safety. Abiding by traffic signals also reduces accidents.
Step-by-step explanation:
The requirement to signal at least 300 feet before you turn is typically regulated by local or state traffic laws. This requirement often depends on the speed limit being driven.
While the information provided does not give an exact speed at which you must start signaling, it is important to note that higher speed limits require longer distances for turning signals due to the increased distance needed to safely slow down and turn.
Therefore, if you are approaching a turn on a road where the speed limit is, for example, 45 miles per hour, you should start signaling well before the 300-foot mark to ensure other drivers are aware of your intent to turn.
Also, speeding through intersections is dangerous and installing a traffic signal could help in reducing accidents by forcing vehicles to slow down. It is crucial to adhere to speed limits, especially in areas with heavy traffic or where accidents have been reported frequently.