The aluminum structure of the DP3 noise barrier maximizes durability and minimizes maintenance costs. 

The aluminum used is the same as the one used in the aerospace industry.

That makes the structure solid, flexible and durable.

Several kinds of infills can be inserted into the structure.

The most used infills are :

• The white pine for its high sound attenuation capacity and low cost.
• The aluminum panel for its appearance and longevity.