Which factor makes it harder to gauge a motorcycle's speed due to its size?

• A. They are louder
• B. They are smaller in size
• C. They have less maneuverability
• D. They use different lanes

Answer: (B)

Smaller size makes it harder to judge how fast something is moving because your brain relies on visual cues to estimate speed. When an object is tiny, there are fewer obvious reference points and less detail to compare with, so the change in its size as it gets closer (the angular size) is harder to read. A motorcycle presents a much smaller image on your retina than a car, and often there aren’t nearby objects to compare it with, which can make it feel like it’s farther away or moving slower than it actually is. The other options don’t affect speed perception in the same way: loudness is an audio cue and doesn’t reliably indicate speed; maneuverability describes handling, not speed perception; and lane choice is about position, not how fast an object appears to be moving.