Drivers have been warned they now face unlimited fines and even prison time if they're caught flouting the rules of the Highway Code.
Last week the Highway Code underwent 33 changes - including clearer advice on where to stop in case of an emergency, the importance of not driving in a lane closed by a Red X, and the use of variable speed limits to manage congestion.
And now those behind the wheel are being told they could face spending time behind bars if they don’t get ‘sufficient sleep’.
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Rule 91 has been updated to ensure drivers understand: "Get sufficient sleep before embarking on a long journey.
"If you feel sleepy, stop in a safe place. Do not stop in an emergency area or on a hard shoulder of a motorway."
"Emergency areas and hard shoulders on motorways are not to be used for rest breaks in the event of driver tiredness.
"Information exists in Rule 262 on appropriate places to take a break when travelling on motorways."
The rules of the Highway Code are essential to know to pass your test, but it's also important to keep up to date as they change.
The Highway Code is updated to reflect changes to the law.
A statement from the Driving & Vehicle Standards Agency said: "The changes made as of today (September 14) refer to guidance on smart motorways. A total of 33 existing rules will be amended and two new rules introduced."
