I am not familiar with this reference, as I perform building and foundation design, not bridges.
I may purchase the 17th edition (which is readily available) and take a risk. For someone who is familiar with this reference: Were there significant changes between the 16th edition(with interims...
The Structural Design Standards for the Fall 2003 Structural PE Exam lists as a reference the AASHTO Standard Specifications for Highway Bridges, Sixteenth Edition, 1996, with interims through 2000.
I will gladly accept any help in finding a copy. Thanks in advance.