The Manual on Uniform Traffic Control Devices is available, free of charge, online at the Federal Highway Administration website. The site not only has the latest 2003 edition, but goes back as far as the 1993 revisions. You should be able to find the right edition to address any pending or potential claim for a roadway that is dangerously unmarked. Compliance with the MUTCD is necessary, but not always sufficient. The MUTCD and the law still require reasonableness by a contractor or highway planner.
The MUTCD is incorporated by reference into the regulations of the Tennessee Department of Transportation. Therefore, violation of the MUTCD is negligence per se.