| Designator | STG12a |
| Type | Guardrail-to-Guardrail (G) |
| System 1 | Median Steel-Backed Timber Guardrail |
| System 2 | Stone-Faced Median Barrier |
| Test Specification | AASHTO MASH 2016 |
| Test Level | TL-3 |
| Drawing Status | As Submitted |
| Perm/Temp | Permanent |
| Contact | Center for Collision Safety and Analysis (CCSA) |
| Manufacturer | Non-Proprietary |
| FHWA Eligibility Letter | |
| Components | |
| Drawings | STG12a_Drawing_20230511.pdf |
| Other Docs | |
| Archive | |
| External Links |
Median Steel-Backed Timber Guardrail to Stone-Faced Median Barrier Transition
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