Many accident reconstruction firms use accident reconstruction simulator programs to re-enact the entire accident. These programs use reports and videos generated from thousands of vehicles tested in car crashes. The videos help give a better understanding of what should occur in accidents of various angles. It also helps to see if things like road barriers and guard rails are up to the required standards. These reconstructions prove to be very useful in supporting cause or lack of cause in accidents.
If you do not wish to go to a reconstruction firm you can find a free accident reconstruction simulator program download on the internet. These probably will not contain all the features that the ones in firms have, but they will be able to create a basic simulation of the accident. If you were seriously injured in an accident it is recommended that you get your reconstruction done by a professional who has more knowledge.