What vehicles must stop at all railroad crossings?
- Pickup trucks
- School buses and passenger buses carrying passengers ✓
- Motorcycles
- Vehicles towing a trailer
Answer: B. School buses and passenger buses carrying passengers
School buses and passenger buses carrying passengers must stop at all railroad crossings.
Why this is the answer
The handbook's railroad-crossing section lists which vehicles must stop every time: school buses, whether or not they have passengers, other buses with passengers on board, and vehicles carrying explosives or flammable cargo. That list matches the choice naming school buses and passenger buses carrying passengers. The passage does not place pickup trucks, motorcycles, or vehicles towing a trailer in that required-stop group. So the stopping rule is tied to those bus types and the hazardous-cargo vehicles, not to the other choices.
Why the other answers are wrong
- A. Pickup trucks — Pickup trucks are not listed in the passage's railroad-crossing stopping rule.
- C. Motorcycles — Motorcycles are not included in that required-stop list.
- D. Vehicles towing a trailer — Vehicles towing a trailer are not named in the passage as vehicles that must stop at all railroad crossings.
Remember it
Use the passenger clue: a school bus or a bus carrying passengers means a full stop at the tracks.