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RE: Golf Course Bridge Design & AASHTO

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   >Do not use AASHTO at all. It is specifically for highway
   >bridges...I would favor using a uniform live load (someone else
   >mentioned this), and the ASCE 7 with ACI 318 Appendix C, and/or AISC
LRFD 2nd
   > Edition.

After thinking about ASSHTO's more conservative allowable stress
requirements (at least in the books I own-still waiting for the Standard
Specifications for Highway Bridges) I looked into LRFD's 2nd ED. Code of
Standard Practice for Steel Buildings and Bridges.  1.4 States the

In the absence of other instructions, the following provisions govern, as

Standard Specifications for Highway Bridges of the American Association of
State Highway and Transportation Officials
Specifications for Steel Railway Bridges...
Structural Welding Code...

I understand this as directions to use AASHTO.  Although the statement, "In
the absence of other instructions" is vague and probably could be
interpreted in any way.