More than half of all motorists have begun a trip having a row with their partners or a family member, according to a new survey.
Continental Tyres, which carried out the survey, said a relaxing holiday often turns into a stressful experience for people when things don't go according to plan.
Motorists have an average of three arguments throughout the journey and around 15% end up more stressed after their holiday than before.
Getting lost on unknown routes and disagreements over directions are among the leading causes of in-car spats, a survey of 2,000 people revealed.
Faults with the car account for nearly one-fifth (18%) of the problems during a holiday trip.
Continental spokesman Tim Bailey said: "The anticipation of a great and much-needed holiday builds expectations - and when problems occur, stress levels rise.
"What really creates tension is when something happens that better planning would have avoided."
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