Brits have been warned they could face a £2,500 fine if they change drivers on long car journeys.
Motorists have been urged to break up their journeys into more manageable chunks, but letting someone else get behind the wheel and stay on the road could land you in hot water.
The official advice is to take a 45-minute break every 90 minutes you drive.
However, if you're traveling in a group, it can be tempting to divide the trip equally so that you can all rest without slowing your progress.
Experts out Hippo leasing have begged drivers not to give in to the urge as they could find themselves on the wrong side of the road law thanks to insurance regulations.
A general assumption might be that as long as all the people taking the trip are insured, all is well.
But things are actually a little more complicated than that.
To hit the road, every driver must be insured to drive the specific vehicle they intend to use.
If you are traveling with a group of friends, it does not matter whether they are insured drive their own car if they are not on your policy.
If you don't follow these rules you could be fined £2,500 if you are stopped.
You can also be struck with eight penalty points on your driver's licenseleaving you almost two-thirds of the way to the 12 needed for a driving ban.
If you already have low-level offenses on your record, this means you will lose your record license for at least six months.
A spokesperson for Hippo Leasing said: “If the car journey is long, it is not unusual for two people to share the driving load and switch destinations halfway through to give each other a break.
“If both drivers are insured to drive the car this is perfectly legal, but if not it could land you with a £2,500 fine and six to eight points on your driving licence.
“So, before you agree to share driving responsibilities, first make sure they are included on your insurance.”
However, there are a few loopholes in the law that could mean avoiding charges.
First of all, you can pay a little extra for temporary insurance.
This covers the driver you want to split the trip with, from just an hour to a month.
And if you don't feel like doing that, you can always make sure their insurance policy includes a Driving Other Cars (DOC) clause.
This allows a motorist to drive any other vehicle in the same driving license category.
Please note that this only includes third party cover, even if their own policy is comprehensive.
DOCs are also not always included, even with comprehensive coverage, so be sure to write one down the next time you renew.
It comes after a new study revealed the UK areas where drivers could be charged up to £250 to park outside their own home.