The SRA was set up last year by the government to work out the best way of bringing Britain's train system up to date.
The plan says how much money will be spent and when we can expect certain improvements to be made - although some are still 10 years away.
Lots of the money will be spent in London, where 70% of all British train journeys start or finish.
New safety system on the way
The first thing to happen will be the introduction of a new safety system for train drivers, to make it much easier to stop bad accidents happening.
By the end of the 10 years the government hopes to have 50% more people using trains, but without the trains being as crowded as they are now.
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