How to protect a roadside plant

Question

Actually, we are planting ten trees every day beside roads in our town, so we need your suggestions on how to protect them from animals and humans.

Answer 1

These articles provide many suggestions for protecting urban and roadside trees:

http://depts.washington.edu/dislc/UrbanTrees/Components.htm
http://www.extension.umn.edu/garden/landscaping/implement/protecting_trees.html