| Designator | SEW18a |
| System Type | W-Beam (W) |
| Functional Type | |
| Test Specification | NCHRP Report 350 |
| Test Level | TL-3 |
| Alignment | |
| Energy Category | |
| Median/Roadside | |
| Perm/Temp | |
| Length | |
| Width | |
| Height | 30" [762mm] < H ≤ 33" [838mm] |
| Manufacturer | Road Systems, Inc. |
| Contact | Road Systems, Inc. |
| Drawing Status | Review Complete |
| FHWA Eligibility Letter | cc88.pdf |
| Components | |
| Drawings | SEW18a-b.pdf |
| Other Docs | |
| Archive | |
| External Links |