One of my friends was in a car accident when he was 4 years old. He has been in a wheelchair ever since. He did track in high school, but there was only about 14 other wheelchair track runners in Iowa. So he did have to go in his own heat for most of the season by himself. He pretty much just had to race for time. But he did end up and now owns the state 200 and 400 meter state wheelchair records.
So I can understand why this person would want to compete, but I dont believe it would be safe for her or others. Because track wheelchairs cannot turn corners very well and if she veered out of her lane at anytime, it could endanger her and others.