We've been warned about the penalties for speeding and drink driving, but you can also be fined for playing music too loud or driving too slowly.

Here are some Queensland road rules you might not know you're breaking.

Sleeping in a vehicle while drunk (even with the car turned off)

If you are in control of a vehicle while under the influence of alcohol you have committed an offence. This can include situations where you are sleeping in the vehicle.

Playing loud music

While pushing your cars stereo to its limits may seem like a fun idea, it can burn a hole in your pocket. If you ignore a verbal warning or instructions from police to turn the volume down, you may be slapped with a hefty fine.

Flashing lights to warn other drivers of speed cameras

Warning other drivers isn't prohibited (not specifically) but using your high-beam lights to warn others within 200m is an offence and it could dazzle the approaching driver.

Driving too slowly

Drivers everywhere know they can be fined for speeding, but motorists can also be potentially fined for driving too slowly. Driving too far below the speed limit is an offence as it can be considered obstructing the path of other road users.

Being an inattentive driver

If you're trying to eat, drink, fix your makeup or are just distracted from the road, you can be fined for failure to drive with due care and attention.

Passenger holding a baby while you drive

The driver is responsible for ensuring everyone in the car is safely secured. All children under the age of seven are required to use an appropriate child restraint.

Riding in the tray of a ute

It is an offence for anyone to ride in the back of a ute. Drivers must make sure your passengers do not travel in any part of the vehicle that is not designed for passengers. The passenger carrying area must be an enclosed part of the structure of the vehicle.

Driving with animals

It is an offence to drive with an animal in your lap or to drive when you don't have proper control of your vehicle. The road rules do not specifically require an animal to be restrained while travelling inside a vehicle. However,It is recommended that drivers restrain animals inside their vehicle for the safety of the animal and occupants of the vehicle. If an animal is carried in the tray of a ute, or in a trailer, it is classed as a load and must be safely restrained.

Failing to use lights

You must have your headlights, tail-lights and number plate lights on when you drive at night or in bad weather that causes reduced visibility (such as heavy rain).If you are driving during the day in fog or in other bad weather with reduced visibility, you may drive with your front fog lights on, with or without your headlights.You must not use fog lights in clear weather conditions, whether it is day or night.

Dirty number plates

Cars get dirty, it's a fact of life, but drivers must ensure their number plates are always readable or face a hefty fine.

Parking on a footpath

While it's tempting to get your car off the road in narrow streets, it's a fineable offence to park on a footpath as it is hazard for pedestrians.