| AWM Table: | Bridges |
| Attribute: | Deck Wearing Surface |
| Purpose: | To identify the material used as the top surface layer of a bridge deck. This helps assess skid resistance, ride quality, drainage, durability, and maintenance needs. |
| Value | Description | Photo Example |
|---|---|---|
| Asphalt | A smooth, black bituminous surface used to provide a durable, flexible driving surface on bridges. |  |
| Ballast and rail | Crushed stone ballast supporting railway tracks laid directly on the bridge deck, used for rail transport bridges. |  |
| Chip seal | A surface made by spraying bitumen and then covering it with small aggregate chips, offering a rough texture and skid resistance. |  |
| Cobble | Rounded stones set closely together, typically seen in older or decorative bridge decks. |  |
| Concrete | A hard, durable surface made from poured or precast concrete, often used for long-term performance. |  |
| Gravel | Loose stone aggregate placed as a simple surface layer, typically found on low-volume or temporary structures. |  |
| Masonry | Built from stone or brick materials, often seen on historic or decorative bridges. |  |
| Rail | Steel rails forming the main wear surface, usually for rail bridges where train wheels make direct contact. |  |
| Wood - Deck Plank | Timber planks laid side-by-side across the bridge deck, used for lighter traffic or traditional bridges. |  |
| Wood - Running Plank | Narrow timber strips placed only where vehicle wheels travel, commonly seen on timber bridges. |  |
| Steel | A metal surface deck, often corrugated or plate, used where strength and minimal weight are needed. |  |
| Other | Any surface type not listed above, such as synthetic materials or combinations of multiple materials. | |
| Unknown | The surface material is not recorded or cannot be determined from current data. |
