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                      

 

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