If a bus becomes disabled on a roadway at night, flares or reflectors must be placed approximately _________ in front of and behind the vehicle.
- 15 metres (50 feet)
- 30 metres (100 feet) ✓
- 90 metres (300 feet)
- 60 metres (200 feet)
Answer: B. 30 metres (100 feet)
Flares or reflectors must be set out approximately 30 metres (100 feet) in front of and behind the disabled vehicle.
Why this is the answer
The truck handbook's emergency warning device section says that when visibility is limited and you cannot move your commercial vehicle off the roadway in a speed limit zone above 60 km/h, you must place one type of emergency warning device about 30 metres (100 ft.) to both the front and the rear. Limited visibility means the period from half an hour before sunset to half an hour after sunrise, which is the night situation in the question. A bus is a commercial vehicle, so that distance is the one to remember.
Why the other answers are wrong
- A. 15 metres (50 feet) — Fifteen metres (50 feet) is not the distance the handbook gives for warning devices around a disabled vehicle.
- C. 90 metres (300 feet) — Ninety metres (300 feet) is far beyond the spacing the handbook requires to the front and rear.
- D. 60 metres (200 feet) — Sixty metres (200 feet) is double the handbook figure and does not match the required placement.
Remember it
Thirty metres and 100 feet are the same number in different units — lock those two together and you have both front and rear covered.