Johnson finished 15th in points with a best finish of tenth at Road America .
One notable driver to compete in the championship was Michael Johnson of Flint , Michigan who is a paraplegic , having lost use of his legs in a motorcycle racing accident .
Michael Johnson finished 15th in points with a best finish of tenth at Road America .
One notable driver to compete in the championship was Michael Johnson of Flint , Michigan who is a paraplegic , having lost use of his legs in a motorcycle racing accident .