What is the primary reason for ensuring vehicle headlights are not facing incoming aircraft?

The primary reason for ensuring vehicle headlights are not facing incoming aircraft is to prevent distraction. When vehicle headlights are directed toward approaching aircraft, especially at night or in low visibility conditions, they can create glare that interferes with the pilots' ability to see and properly assess the landing area or runway environment. This distraction can lead to increased risk during critical phases of flight, such as approach and landing.

Maintaining a safe and distraction-free environment for pilots is essential for aviation safety, as it allows them to maintain focus and perform their duties effectively. While energy savings, maintenance costs, and color specifications are important considerations in other contexts, they do not directly address the immediate safety concerns posed by distracting aircraft operators.