What is the benefit of a space cushion around your vehicle?
- Other drivers can cut in front of you, improving the flow of traffic.
- If another driver makes a mistake, you have time to react. ✓
- It inflates to protect you from injury in the case of a collision.
Answer: B. If another driver makes a mistake, you have time to react.
A space cushion gives you enough time to react if another driver makes a mistake.
Why this is the answer
The handbook ties safe following distance to reaction time. It says tailgating blocks your view and leaves too little time if the car ahead brakes suddenly, while following at a safe distance gives you enough time to react when another driver makes a mistake. That is the point of a space cushion: it preserves room to see and respond. The handbook also suggests easing off the accelerator when someone merges in too closely, which restores space ahead.
Why the other answers are wrong
- A. Other drivers can cut in front of you, improving the flow of traffic. — Letting other drivers cut in is not the benefit described; the handbook treats a close merge as something to handle by easing off the accelerator to create space again.
- C. It inflates to protect you from injury in the case of a collision. — A space cushion is following distance and room around the car, not an inflating safety device, and the passages do not describe anything that inflates.
Remember it
Think of the cushion as your reaction room: more following distance means more time to respond.
Official handbook: California Driver Handbook (DL 600), Section 8: Safe Driving, p. 57