In car accident cases, there are typically relatively "good" settlements on ankle injury cases. For our purposes here, "good" is defined as the probability of getting a reasonable settlement offer before filing a lawsuit.
Why are ankle injury cases easier to settle than other accident claims? But the most obvious explanation is the nature ankle injuries. With neck and back injuries, which are common car accident injuries, people with the exact same radiological findings can have very different manifestations of pain. Given this, insurance companies tend to assume the lowest level of pain in these types of cases.
In contrast, ankle injuries are far less often the result of degenerative changes and are usually caused by trauma, rarely leading to concerns about preexisting injuries or arthritic changes. Just as importantly, they are typically objective injuries we can see on a radiology report. It also helps in reaching a value of an ankle injury for settlement purposes that the treatment of ankle injuries is generally not as involved as other car accident injuries which decreases the extent of the "you should not have gotten so much treatment" arguments from the insurance company.
Four years ago, the Maryland Injury Lawyer Blog reported on ankle verdicts and settlements in Maryland. You can find those here. A recent Jury Verdict Research study found that the average ankle injury verdict is $290,130 ($90,000 is the median). Maryland's median - again, four years ago - was right on par with the national average at $88,000.
I think this is useful data in determining an appropriate value for an ankle injury settlement. That said, all average verdict data is of questionable usefulness in a given case and ankle injury data is probably even less useful than most other types of car accident injuries. You can drive a truck though the difference in settlement value between a hairline ankle fracture and a crush injury. So, as always, take the ankle verdict data with a grain of salt.