In a recent survey carried out by road safety charity Brake and Direct Line, more than half of drivers polled admitted to not taking regular breaks whilst driving on long journeys.
55% of drivers did not follow guidance to take rest breaks every two hours on a long trip.
Plus, 35% of drivers of the 1,000 surveyed said that they often continued a journey despite feeling sleepy.
Brake is calling for more rest areas for drivers and urging the government to advertise to highlight the issue.
The survey comes as many families across the country prepare for driving to summer holiday destinations both in the UK and Europe.
The study also found that 14% of male drivers had driven for six hours or more without a break compared to 3% of female drivers.
Currently there is no maximum driving time for motorists, but HGV drivers must take a break every 4½ hours in adherence to both EU and UK rules.
Breaks are needed for keeping drivers alert and awake, as is getting a good night of sleep the night before a long journey.
The potential to cause an accident from falling asleep at the wheel can be fatal to drivers and other road users.
The RAC Foundation says that fatigue is reported in just 2% of road traffic accidents, but estimates the real figure to be closer to 20%.