When crossing or entering traffic from a side road in a CMV, why do you need a much larger gap than a car?

1. Commercial vehicles are more visible so they need more room for other drivers to see them
2. CMVs accelerate more slowly and take up more space, so you need a larger gap to safely enter traffic flow
3. CMVs have better brakes so they can afford to take smaller gaps
4. This is only true for vehicles over 80,000 pounds GVW