Table 2
Total Noise Barrier Area By Material Type
Through 2007
| Material | Square Feet (Thousands) |
|---|---|
| Concrete/Precast | 83,186 |
| Block | 35,156 |
| Concrete/Unspecified | 14,318 |
| Wood/Post & Plank | 5,953 |
| Metal/Unspecified | 4,742 |
| Berm Only | 4,322 |
| Wood/Glue Laminated | 3,701 |
| Absorptive | 3,629 |
| Wood/Unspecified | 3,055 |
| Other | 1,812 |
| Brick | 1,279 |
| Precast Concrete | 924 |
| Concrete/Cast-in-place | 565 |
| Conrete/Unspecified | 565 |
| Conc/Precast | 384 |
| Concrete Precast | 207 |
| Conrete/Precast | 183 |
| Concrete/Block | 80 |
| Other (Concrete posts, Recycled Plastic Panels) | 23 |
| Other (Polyethylene) | 17 |
| Other (Manufactured Product) | 17 |
| Wood (Unspecified) | 15 |
| Transparent | 10 |
| Other (Plexiglass) | 4 |
| Total | 164,147 |
Table 2 lists the distribution of barriers by type of material. Earth (berm), masonry block (block), brick, concrete, metal, wood, other materials (e.g., polyurethane) and combinations of materials have all been used to construct barriers.
