Why is it more diffcul to judge a motorcyke speed and distance?

Judging a motorcycle's speed and distance is more challenging than for larger vehicles due to its smaller size and profile, which can create a visual illusion of being further away or moving slower. Additionally, motorcycles often maneuver through traffic or change lanes quickly, making it harder to estimate their velocity accurately. The lack of a fixed frame of reference, such as the size of a car or a person, further complicates perception. These factors combined can lead to difficulty in accurately assessing their speed and distance on the road.