This widely used model is coupled with an expansive commentary that explains the reasoning behind every provision, instructs on applying the model to particular circumstances, and provides alternative and optional provisions to address a variety of situations. Users can easily customize the document to handle different trail types and uses. Download both the model and the commentary.
The 1st, 2nd, 3rd, and 4th editions were originally published in 2007, 2008, 2010, and 2018 respectively. The 4th edition was last updated in 2022.