Final answer:
Visual checks before lane changes are made to spot vehicles in blind spots and ensure road safety. They also help to prevent sudden moves and uphold lane discipline.
Step-by-step explanation:
The reason for making visual checks to the left or right before changing lanes is primarily to ensure there are no vehicles in your blind spot. Blind spots are areas around your vehicle that cannot be seen through your mirrors. Making these checks is a critical safe driving practice to prevent collisions.
Additionally, checking for obstacles or pedestrians is essential for overall road safety, especially in areas where pedestrians may be present. Maintaining proper lane discipline helps in preventing unnecessary or sudden lane changes that can lead to accidents. Therefore, a visual check before changing lanes is necessary for the safety and efficiency of all road users.
These principles apply whether you're driving near a busy intersection, tollbooths, or open highways. Situational awareness is key as driving behavior may be influenced by several factors, including the presence of law enforcement or changes in traffic patterns, as indicated by the installation of new traffic signals for improved safety.