Free Technology eBooks Online: Highways, Railways, and Bridges

Here is a list of online   Books about Highways, Railways, and Bridges    available for free downloading in various formats  or for online reading:

Nonconventional Concrete Technologies: Renewal of the Highway Infrastructure by National Research Council National Materials Advisory Board (page images and partial HTML at NAP)

The New York Subway: Its Construction and Equipment (1904 edition) by Interborough Rapid Transit Company (illustrated HTML at k2nesoft.com)

Tunneling Under the Hudson River (New York: John Wiley and Sons, 1885) by S. D. V. Burr (illustrated HTML at tmk.com)