Is it permitted to drive a vehicle when one of the wheels of its trailer or semi-trailer is not in contact with the road (due to the way in which it was connected or loaded to the vehicle)?
- Yes, when loading heavy freight on the rear extension.
- Yes, subject to the approval of a police officer and with proper escort.
- Yes, if the cab is very high and the semi-trailer’s front wheels are lifted.
- Correct answer: No.
Why this is the answer
The correct answer in the official bank: No.
Every wheel of a trailer or semi-trailer must touch the road while driving. A wheel in the air carries no weight and gives no braking, so the other wheels are overloaded, braking weakens and the combination becomes unstable. If the coupling or the loading causes this, fix the hitch or redistribute the load before moving. Police approval or an escort does not make it allowed.