Report of highway research at Pittsburg, California, 1921 and 1922

The methods and results at the Pittsburg, California, test highway are herein presented for the benefit of those who are interested in the construction of public highways. The present report reflects largely the viewpoint of the engineers who were in comp. The methods and results at the Pittsburg, California, test highway are herein presented for the benefit of those who are interested in the construction of public highways. The present report reflects largely the viewpoint of the engineers who were in complete charge of the tests but it has been to some extent edited by the California Highway Commission and the U.S. Bureau of Public Roads.