What is the required side clearance when passing two-wheeled vehicles?

Answer: C — 1.5 meters

The correct answer is based on safety regulations that aim to protect vulnerable road users, particularly those on two-wheeled vehicles such as motorcycles and bicycles. The required side clearance of 1.5 meters ensures that there is ample space between vehicles passing each other. This distance is crucial because it helps to prevent any accidental contact that could occur due to the movement of the two-wheeled vehicle or the passing vehicle. A clearance of 1.5 meters is a standard that provides a buffer zone, making it safer for both the cyclists or motorcyclists and the drivers of larger vehicles. Additionally, maintaining this distance can help in accommodating various road and weather conditions that may affect the stability and maneuverability of two-wheeled vehicles. Keeping this required clearance serves not only legal requirements but also promotes responsible driving practices, ensuring the safety of all road users.