Several years ago, the US military got together with AIA, CSI, the United States Coast Guard, GSA, NIBS and others to try to work on a standard. It is free, and available here:
I like it, too many layers, but I don't use them all. We use it in my firm, but we do a lot of Dept of Defense work...I wouldn't bank on how "standard" it is.
If you are in PA, USA, using PennDOT's standards as a template will be OK...with the following exceptions:
PennDOT uses 1" = 25' as their standard plan and profile viewport scale. Noone else does, and I have only ever seen one scale with those increments on it, and it was very old.
PennDOT uses Microstation. So make sure your standard hatches, linetypes, fonts and symbols jive with the software you, your consultants and the review agencies use. If that software is AutoCAD, I will tell you from experience that they often do not.
Remember: The Chinese ideogram for “crisis” is comprised of the characters for “danger” and “opportunity.”
-Steve