HomeMy WebLinkAboutSDP200500083 Correspondence 2006-05-01�uA'i
�rkGSN1A
County of Albemarle
Department of Community Development
Memorandum
To: Bill Fritz, designated Agent for Current Development
From: Glenn Brooks, designated County Engineer for Current Development
Date: 26 July 2005
Subject: Private street standard for streets serving non - residential, non - agricultural, attached
residential, multi -unit residential and combined residential and non - residential uses.
As the designated County Engineer for Current Development, this is my recommendation for an alternative
private street standard according to Subdivision Ordinance section 14 -412B; (referenced from 18- 32.7.3 and
14 -233)
B. Private streets serving non - residential, non - agricultural, attached residential, multi -unit residential
and combined residential and non - residential uses. Each private street authorized to serve non - residential, non-
agricultural, attached residential, multi -unit residential and combined residential and non - residential uses under
sections 14 -232 or 14 -233 shall satisfy Virginia Department of Transportation standards or an alternative standard
deemed adequate by the agent, upon the recommendation of the county engineer, to be equivalent to or greater
than the applicable standard in the design standards manual, so as to adequately protect the public health, safety or
welfare. The agent may require minimum travelway widths to provide for on- street parking upon a determination
that the provisions for off - street parking may be inadequate to reasonably preclude unauthorized on- street parking.
The recommended alternative standard is;
- Maximum Grade: 10%
-Minimum Sight Distance: 100 ft.
- Minimum Horizontal Curvature: as necessary to maintain sight distance
- Minimum Vertical Curvature: crest K = 5, sag K = 15
- Minimum Width, curb face to curb face: 20' without parking, or 24' travelway parking dimensions as
required by the Zoning Ordinance.
- All other applicable standards are to be per VDOT Subdivision Street requirements, such as guardrail and
pavement design requirements. Clear zone requirements and recommended speeds are not deemed
applicable. Turnarounds are not necessary in parking areas where adequate space has been provided for
backing, and three -point turns, and emergency vehicle access as indicated by the Fire /Rescue Department.
Minimum curb radii at intersections are to be 12.5' feet according to VDOT standards.
This standard is meant to match the standards from the Zoning Ordinance used for parking areas and
travelways (section 18- 4.12.15). We have discussed this reasoning many times in the past, essentially that an
accessway deemed safe and convenient for the intended use remains safe and convenient regardless of
whether it is subdivided or not, calling it a travelway or a street.
We now have a number of site plans under review which require this policy clarification, and there is no
guidance currently available in the Design Manual as referenced in the Subdivision Ordinance adopted last
month. Should this standard be deemed adequate by the Agent, it is recommended it be included in the
Design Manual upon the next revision.
File: street stnd multifam GEB.doc