If you are involved in a single vehicle collision there are still things that need to be examined by you.
What was the cause of the collision? Obviously if you feel asleep at the wheel or were texting on your phone then you don't have a claim against anyone other than your own stupidity.
However if your wreck was caused by a mechanical failure of the vehicle then there may be a potential product liability lawsuit against the manufacturer. There have been a lot of cases in the past ten years involving one vehicle collisions including Firestone tire blowouts and Ford Explorer roll over cases.
If a one vehicle wreck involves a death or permanent injuries it is worth your time to contact an attorney about the case to discuss it. The injuries may have been the result of something other than human error.
Oftentimes there is a history of these type of problems in a vehicle. It is important to contact an attorney very early in the process in these cases because the vehicle will need to be preserved so that the appropriate experts can analyze it.