It's hard to tell what the value of an injury is at the beginning of a case. There should be some understanding of the severity and prognosis of the injury before negotiating with the insurance company.
How much a claimant receives depends on a number of things including the type of injury, treatment, duration of symptoms, and side-effects. There are other things that come into consideration such as pre-existing conditions, lost income, difficulty with maintaining the household, and care costs.
In one example of a case involving moderate whiplash, the claimant was awarded $40,000 in general damages. In another example of a case involving soft tissue injuries and pain and suffering that resulted for several years, the claimant received $45,000.
Every case is different and these are just examples. The value of road injury claims range significantly.