What is the maximum allowable length for a combination vehicle?
- 20 meters (66 feet)
- 23 meters (75 feet) ✓
- 25 meters (82 feet)
- 30 meters (98 feet)
Answer: B. 23 meters (75 feet)
The maximum allowable length for a standard combination vehicle is 23 metres (about 75 feet).
Why this is the answer
The truck handbook sets a general ceiling: no combination of vehicles may be longer than 23 metres, which it gives as 75.5 feet. It then makes an exception for double-trailer rigs that satisfy special conditions for the trailers and tractor. That makes 23 metres the figure to choose for the normal combination limit. The listed 75 feet is a rounded version of the handbook's 75.5 feet, so it matches the bank answer.
Why the other answers are wrong
- A. 20 meters (66 feet) — A 20-metre combination is below the handbook's general 23-metre ceiling, so it is not the maximum.
- C. 25 meters (82 feet) — 25 metres is longer than the handbook's general limit, so it is too high.
- D. 30 meters (98 feet) — 30 metres also exceeds the general 23-metre cap and is not allowed for a normal combination.
Remember it
Think of 23 as the general ceiling; only special double-trailer rigs get extra room.