1. You can now be fined 1.5 times your weekly income for an offence
Previously the limit was one week's wage. The new guideline applies to those travelling more than 20mph over the limit, including anyone doing more than 100mph on the motorway.
2. But there's still a cap on the fines
No matter your income, you can't be fined more than £2,500 for speeding on the motorway and £1,000 for offences elsewhere.
3. And magistrates don't actually have to follow guidelines
According to the Sentencing Council, "sentencing guidelines must be followed, unless a judge or magistrate feels it is not in the interests of justice to do so".
4. No matter what, speeding motorists face three points on their license
Plus a minimum of a £100 fine. The worst offenders can also face up to six points on their license or a 56-day ban on driving.
5. And you can still be banned from driving if you keep speeding
Accumulating 12 or more points over three years can mean getting banned from the road altogether. For newly qualified drivers, the limit is six points in your first two years.
6. The measures are a response to a number of serious incidents
In 2015, 244 people were killed in crashes where the driver was breaking the speed limit.
7. It's been welcomed by motoring associations
The president of the AA and the director of the RAC Foundation are both welcomed the change, though RAC Foundation director Steve Gooding said the cap on fines still means there is not a "level playing field" when it comes to penalties.