Authoritative roads and driveways — source cluster (agency, extension, manuals)¶
Evidence summary¶
| Field | Content |
|---|---|
| Abstract | Primary-weight index (FHWA, NRCS, Penn State, USFS, BMPs; FHWA pointer where PDF not in vault) for unpaved road geometry, drainage, and erosion—so supporting topic pages and site analyses can cite manuals before forums. |
| Authority mix | Federal manuals + extension/agency PDFs in vault; community sources listed separately in-page. |
| Decision relevance | Informs driveway / internal road maintenance and erosion mitigation framing for 120-acre access and steep terrain discussions—not permit engineering. |
| Canonical wiki links | Rural road and driveway erosion sources · Steep curved hill dirt road — erosion prevention (120-acre farm) · Dirt road erosion — shade, hill, and curve (planning synthesis) |
Key claims (public-safe):
- Drainage-first maintenance (crown, cross-slope, water bars, rolling dips) recurs across NRCS/USFS/Penn State manuals—implementation is site-specific.
- FHWA gravel guide is referenced as a widely cited manual; URL lives on the dedicated FHWA source-note when PDF is absent locally.
Open questions / follow-ups
- County ROW, easement, and stormwater rules still require local lookup.
Purpose: Primary-weight index for unpaved road geometry, drainage, and erosion control—so Rural road and driveway erosion sources and road analyses can cite standards/agency/extension before forums or vendor blogs.
Epistemic: This cluster does not replace a site engineer or county rules for a specific driveway permit.
Federal / widely cited references (official or manual-grade)¶
| Source | Vault |
|---|---|
| FHWA — Gravel Roads Construction & Maintenance Guide | FHWA — Gravel Roads… (official reference) — URL + ingest backlog (PDF not yet in raw/). |
| NRCS — Layman’s Guide to Private Access Road Construction in the Southern Appalachian Highlands (2005 PDF) | laymans-guide-private-access-road-appalachian-nrcs-2005-pdf.md |
| Penn State — Center for Dirt & Gravel Road Studies — crown / cross-slope technical bulletin | penn-state-tb-crown-cross-slope-dirt-gravel-roads-pdf.md |
| USFS — traveled-way surface shape (1997) | usfs-traveled-way-surface-shape-1997-pdf.md |
| Low-volume roads BMP — Chapter 7 roadway drainage | low-volume-roads-bmp-chapter7-roadway-drainage-pdf.md |
| Kentucky EPSC — protect slopes | kentucky-epsc-protect-slopes-guide-pdf.md |
| Ridge to Reefs — management practices for dirt roads (PDF) | management-practices-dirt-roads-culebra-ridge-to-reefs-2015-pdf.md |
Exploratory / community (supporting only)¶
Reddit threads, memoir articles, and vendor marketing captures listed under the same topic hub remain valid for vocabulary and field experience—see per-note confidence: low and Authority lines.
Synthesis¶
Dirt road erosion — shade, hill, and curve (planning synthesis)Steep curved hill dirt road — erosion prevention (120-acre farm)