Almost three in four motorists have run into difficulty driving abroad, according to a survey.
As many as 16% have driven on the wrong side of the road while on a foreign trip, the poll by insurance company Aviva found.
And 5% have had an accident either driving overseas or while on a holiday in the UK.
Based on responses from 1,000 drivers intending to drive in the UK or abroad this summer, the survey also revealed that 28% have misread or misunderstood foreign road signs.
The biggest concern for those driving abroad is lack of familiarity with the route (28%), while in the UK the major worry is volume of traffic.
The British weather is seen as a major obstacle to 12% of those touring at home.
Tiredness and boredom affects drivers more in the UK than overseas. As many as 58% admitted to getting lost either in the UK or abroad.
On average, drivers estimate they will drive 250 miles to reach their destination and will be behind the wheel for five hours. Once arrived, motorists will cover, on average another 125 miles on day trips or driving between locations.
As many as 70% were unable to predict their journey times and distances very accurately, suggesting they may not be fully prepared for their trip.
Nigel Bartram, senior motor underwriter at Aviva, said: "Most of us will be jumping into a car when we go off on holiday this summer and will cover hundreds of miles in pursuit of a well-earned break.
" However, while we might favour driving over queuing in airports, despite the high petrol costs, it is not without its hazards."