<p>In 1992, the U.S. Federal Highway Administration (FHWA) initiated an effort with the American Iron and Steel Institute (AISI) and the U. S. Navy (Navy) to develop new high-performance steels (HPS) for bridges. The driving force for this project was the need to develop improved higher strength, improved weldability, higher toughness steels to improve the overall quality and fabricability of steels used in bridges in the United States. It was furthermore established that such steels should be "weathering". By this is meant the ability to perform without painting under normal atmospheric conditions.</p>
The railroads of the United States; their history and statistics comprising the progress and present condition of the various lines with their earnings and expenses. To which are added a synopsis of the railroad laws of the United States, and an article on the comparative merits of iron and steel rails