| Comparison of Standards for Rural Area Roads and Driveways | PROPOSED | |||||||||||
| County review before construction | minimum easement width (ft) | surface material* | minimum surface width | minimum shoulder width (ft) | maximum grade | vertical alignment Kc, Ks | maximum horizontal curvature (ft) | sight distance minimum (ft) | turnaround required | drainage | minimum clearance vert., horz. (ft) | |
| driveway | Yes | n/a | n/a | 10 | n/a | 16% | n/a | n/a | n/a | n/a | 10yr + *** | 14, 10 |
| 2-5 lots | Yes | 30 | >7% paved, <7% gravel | 14 | 3 | 16% | 5, 15 | 40 | 100 | Yes | 10yr | 14,10 |
| 6 or more lots | Yes | 40 | paved | 18 | 4 | 16% or 10%** | 10, 20 | 95 or 120** | 125 | Yes | 10yr | variable, 26'+ |
| * paved refers to prime and seal, not asphalt. | ||||||||||||
| ** the second value refers to VDOT rolling terrain, the first to mountainous terrain, which is usually allowed | ||||||||||||
| *** drainage requirements from Water Protection Ord. section 17-320 for stream crossings; bridge, arch or box, with mitigation | ||||||||||||
| **** a 16% grade is typically used as a maximum in design | ||||||||||||
| changes are highlighted | ||||||||||||
| Road standards from Sub. Ord. section 410 and 412 | ||||||||||||
| Driveway standard from Zoning Ord. section 4.6.6 | ||||||||||||