Collisions are more likely to happen when:
- All vehicles are traveling at about the same speed.
- One lane of traffic is traveling faster than the other lanes.
- One vehicle is traveling faster or slower than the flow of traffic. ✓
Answer: C. One vehicle is traveling faster or slower than the flow of traffic.
Collisions are more likely when one vehicle is traveling faster or slower than the flow of traffic.
Why this is the answer
The handbook's list of common collision causes includes a vehicle whose speed is above or below the traffic flow. That tells you the risk comes from a vehicle whose speed does not match the traffic around it. The passage does not list uniform speeds or a faster lane as causes; it names a vehicle moving faster or slower than the flow. So the choice that matches the handbook is the one about one vehicle's speed differing from traffic.
Why the other answers are wrong
- A. All vehicles are traveling at about the same speed. — All vehicles traveling at about the same speed is not listed as a collision cause in the passage; the passage points to a vehicle whose speed differs from traffic flow.
- B. One lane of traffic is traveling faster than the other lanes. — A single lane moving faster than other lanes is not the same as the handbook's listed cause, which describes one vehicle going faster or slower than the flow of traffic.
Remember it
Watch the speed gap, not just your own speed: a vehicle out of step with traffic is the one the handbook flags.