Hyundai Elantra HD: One person per belt - Seat belt precautions - Seat belts - Safety system of your vehicle - Hyundai Elantra HD 2006–2010 Owners ManualHyundai Elantra HD: One person per belt

Two people (including children) should never attempt to use a single seat belt. This could increase the severity of injuries in case of an accident.

Injured person
A seat belt should be used when an injured person is being transported. When this is necessary, you should consult a physician for recommendations. ...

Do not lie down
To reduce the chance of injuries in the event of an accident and to achieve maximum effectiveness of the restraint system, all passengers should be sitting up and the front seats should be in an u ...