A farm tractor is approaching you at dawn with its headlights switched on. What must you reckon with?

The selected answer is correct because it encompasses critical aspects of safely interacting with farm tractors on the road.

1. Farm tractors often have large work equipment attached that may not be visible, making it unpredictable when they are in motion. This highlights the importance of caution when approaching.

2. Although the headlights are on, it isn’t always easy to gauge the width of the tractor, especially in low visibility conditions like dawn. This is crucial for ensuring safe passing distances.

3. Tractors can pull wide trailers, which adds to the complexity of assessing their dimensions and maneuvers on the road.

Understanding these points is essential according to German traffic laws, as they emphasize the need for awareness and caution when driving near agricultural vehicles, preventing accidents and ensuring road safety.