Why do you need extra space to the side of a combination vehicle compared to a single vehicle when a car is merging nearby?

Pick an answer

1. A combination vehicle actually has smaller blind spots than a single vehicle because of its extra convex mirrors
2. The trailer's length and width leave less margin for a merging vehicle to misjudge, and the driver has larger blind spots to cover
3. Side space only matters for parking, not for merging traffic
4. Merging traffic always yields automatically to larger vehicles

Correct!

Not quite. The correct answer is highlighted.