When changing lanes, you should signal at least 100 feet before you start to change lanes, then check mirrors and look over your shoulder to check your blind spot. Option 2, signaling 100 feet in advance, is the correct choice for maximum safety.
When preparing to change lanes, such as merging into a bike lane, or entering a center lane or a left turn lane, you should always signal at least 100 feet before you begin the lane change. After signaling, you must check your rearview mirror and then turn your head to look over your shoulder to ensure that your blind spot is clear before proceeding with the lane change. This safety practice is crucial in preventing potential accidents and ensuring the safety of all road users, including other cars and bicyclists.
An understanding of vehicle dynamics and stopping distances, based on examples like calculating how long cars take to pass between two points, informs the safe distance required for lane changes. This explanation helps apply practical knowledge for real-world driving scenarios, providing a safer driving environment.
The correct answer for signaling before a lane change is 100 feet, which is option 2. It is essential to always prioritize safety and awareness when operating a vehicle.