Sorry, your idea will yield very little results if any.....
When dealing with outside noise(road noise) you need MASS and Height lots of it....
Cinder block wall filled with sand or concrete 8'-10' high at least and as close to the noise source as possible.
Also keep in mind that distance will play a huge role in this as well, the further the wall is from the source the higher chance of sound flanking over the top of the wall.
We have had people use MLV on a wood fence with modest results, but again results can vary.
http://www.soundproofing.org/infopages/flooring.htm