HomeMy WebLinkAboutSUB201600066 Approval - County 2016-09-13COUNTY OF ALBEMARLE
Department of Community Development
401 McIntire Road, Room 227
Charlottesville, Virginia 22902-4596
Phone (434) 296-5832 Fax (434) 972-4126
Project:
Plan preparer:
Owner:
Applicant/Developer:
Plan received date:
(Rev. 1)
(Rev. 2)
Date of comments:
(Rev. 1)
(Rev. 2)
Reviewer:
(Rev. 2)
Woodlawn Subdivision, ROAD Plan
Clint Shifflett, Timmons Group /608 Preston Ave #200 Charlottesville, VA
22903 [clint.shifflett@timmons.com ; craig.kotarski@timmons.com ]
Marjorie M. Paul /2163 Bonaventura Drive, Vienna, VA 22181
Woodlawn Development, LLC /2180 Owensville Rd, Charlottesville, VA 22901
25 Mar 2016
13 Jun 2016
19 July 2016
2 May2016
18 Jun 2016
13 Sept 2016
John Anderson
Matt Wentland
ROAD Plan (SUB201600066)
Clint,
All comments have been addressed and the road plans have been approved by all agencies.
Note / C 1.0 —Proposed road cross section: 25 mph design speed /shoulder -ditch design /20' paved width /no
parking /80 ADT (8 single-family residential units) qualifies for reduced roadway width per VDOT Road
Design Manual, rev. Apr -2016 /AASHTO Green Book.
Table 2: Geometric Design Standards for Residential and Mixed Use Subdivision Streets (GS-SSAR):
Lower design speeds (and street widths) may be utilized provided they are
designed in accordance with the AASHTO Green Book or AASHTO's Guidelines
for Geometric Design of Very Low -Volume Local Roads (ADT<400). The
designer should coordinate with VDOT in advance of design (e.g. sketch plan
stage) if this alternative criteria is being utilized.
AASHTO, A Policy on Geometric Design of Highways and Streets, 2011, 6" Edition:
Engineering Review Comments
Page 2 of 4
5-6 I A Policy on Geometric Design of Highways and Streets
Table 5-5. Minimum Width of Traveled Way and Shoulders
Metric
U.S. Customary
Design
Speed
(km/h)
Minimum Width of Traveled Way (m)
for Specified Design Volume (veh/day)
Minimum Width of Traveled Way (ft)
Design for Specified Design Volume (veh/day)
under
400
400 to
1500
1500 to
2000
over
2000
Speed under
(mph) 400
400 to
1500
1500 to
2000
over
2000
20
5.4
6.0°
6.0
6.6
15 18
20°
20
22
30
5.4
6.0°
6.6
7.2b
20 18
20°
22
24b
40
5.4
6.0°
6.6
7.2b
25 18
2W
22
20
50
5.4
6.0
6.6
7.2b
30 18
20°
22
24b
60
5.4
6.0°
6.6
7.2b
40 18
2W
22
20
70
6.0
6.6
6.6
7.26
45 20
22
22
24b
80
6.0
6.6
6.6
7.26
50 20
22
22
24b
90
6.6
6.6
7.26
7.26
55 22
22
246
20
100
6.6
6.6
7.2b
7.2b
60 22
22
246
24b
65 22
22
246
20
Allof
speeds
Width of graded shoulder on each side
the road (m)
Width of graded shoulder on each side
All of the road (ft)
0.6 1.5.°-0 1.8 2.4
speeds 2 5" 66E81:::
° For roads in mountainous terrain with design volume of 400 to 600 veh/day, use 5.4-m [18 -ft] traveled way
width and 0.6-m [2 -ft] shoulder width.
ACF&R reauires a minimum 20' Daved width for Fire Rescue ADDaratus. A 20' paved width is provided.
Additional width may be required of similar subdivisions in the future for school bus access. Given limited
number of residential units and roadway length, Engineering does not object to proposed 20' width.
Note:
VDOT Road Design Manual, Rev. Apr. 2016, Table 4, Geometric Design Standard for School Bus Access
Road requires Min. 24' paved width /4' shoulders for 2 -way travel with no parking. Apr -2016 revision to
VDOT Road Design Manual revises standards that may alter county review. Decisions affecting residents'
right to receive public school bus service, including special -needs buses requiring long -interval stationary
idling, require cautionary counterbalance to any tendency to approve design alternatives that do not meet all
relevant VDOT standards. Reduced radius cul-de-sac (less than typical) on a recent project set uneasy
precedent where VDOT standards are concerned. This is to be avoided. In this instance, eight residences
and roadway length (900 -ft, 0.17 Mi) taken with Table 2 options support proposed 20' paved width. Last:
Albemarle County Schools should not be placed in technical advisory position of sharing transportation
routing policy* (changeable) as basis of (permanent) design approval. A 24' width is generally preferable
for a variety of performance and safety reasons. Engineering may in the future request that small volume
street designs reflect Geometric Design Standards for school bus access road, depending on circumstance.
Ref. Road Design Manual, Apr -2016, Appendix B(1)/SSAR, Eff. July 1, 2009, pg. B(O-18 -image below:
(Rev. 1) Acknowledged.
Engineering Review Comments
Page 3 of 4
GEOMETRIC DESIGN STANDARDS FOR SCHOOL BUS ACCESS ROAD
The minimum pavement widths for school bus access roads, by section type.
One Way
Rural (Shoulder)
Urban (Curb and Gutter)
Pavement
16 feet
22 feet (2)
Shoulder
4 feet (1)
-
Parking
Prohibited
8 feet additional per parking lane
Minimum Turning Radius
45 feet
45 feet
Two Way
Rural (Shoulder)
Urban (Curb and Gutter)
Pavement
24 feet
24 feet (2)
Shoulder
4 feet (1)
-
Parking
Prohibited
8 feet additional per parking lane
Minimum Turning Radius
45 feet
45 feet
Note: (1) Without Guardrail: with Guardrail add 3 feet.
(2) Minimum 30 feet Right of Way as required.
TABLE 4 — SCHOOL BUS ACCESS ROAD'
* "Elementary school students are allowed to walk up to 0.3 miles to the bus stop" (Craig Kotarski, Timmons, October
07, 2015 7:05 PM email to County, re. 20 lot subdivision ROAD Plan —per Jim Foley, Albemarle County schools director
of transportation)
2. C1.0 —Recommend extend stone base 12" beyond edge of pavement. (Rev. 1) Addressed. Applicant
response: "VDOT has approved the proposed section as shown. With this in mind, we have not extended
the stone base."
3. C2.0 —Show stream buffer. (Rev. 1) Addressed.
4. C4.0 /C4.1 —Revise these sheet titles to: Site Layout. ROAD Plans cannot approve Site Plans. (Rev. 1)
Addressed.
5. C4.0 /C4.1 —Show outline of grass channels and extended detention; retain channel /detention labels; show
permanent SWM facility easements. Remove other SWM facility/BMP details. Instead, reference
WP0201600021. Design revision to WPO plan should not require revision to ROAD Plan. (Rev. 1)
Partially Addressed. Applicant response d. 9 -Jun 2016: "The ditch and stilling basin details are necessary
for VDOT review as they are adjacent to the public right-of-way and VDOT maintained culverts."
Engineering accepts this position, and re -states request that any remaining SWM facility BMP details be
removed from ROAD Plans. For example, show SWM #1 as single line outline. Ref. WP0201600021.
(VDOT has no authority or jurisdiction to review or approve this SWM facility.) (Rev. 2) Addressed.
6. C4.0 —Curve Table: it is unclear whether curve 1 is near cul-de-sac and curve 2 near Woodlands Road.
This seems to be the case, but please clarify. Show PC/PT for each curve on/with roadway CL stationing.
(Rev. 1) Partially Addressed. Show PC/PT for each curve on/with roadway CL stationing. (Rev. 2)
Addressed.
7. C4.0/C4.1 —Provide: traffic control (stop, speed limit, no parking) and street name signs. (Rev. 1)
Addressed.
8. C4.0/C4.1 —Stilling basin A B weir calculation details: Recommend label culvert outfall protection /stilling
basin floor elevation. Culvert A: 561', Culvert 13: 542'. (Rev. 1) Addressed.
9. C4.0/C4.1 —Note (Weir Calculations): I(100) =5.3 in/hr as opposed to 5.8 in/hr —conservative approach
does not require revision. (Rev. 1) Acknowledged. Unchanged.
10. C4.1 —Lot 6: Confirm with ACF&R that 12.6% and 9.4% grades will not impede fire/rescue access (newer
units). Concern with recent project that tow hook (13- 1/8" hook -to -ground clearance) may drag pavement.
(Rev. 1) Addressed. Ref. ACF&R email to Applicant: 6/16/2016 10:43 AM; no concerns expressed. No
portion of Lot 6 driveway exceeds 16%.
Engineering Review Comments
Page 4 of 4
11. C5.0 —Provide VDOT CD -1 at Woodlawn Road, station 17+25, station 18+25, approximately. (Rev. 1)
Addressed.
12. C5.0 —Recommend revise profile to read Woodlawn Road. (Rev. 1) Addressed.
13. C6.0 —Note (Culvert A B calculations): I(25) =4.5 in/hr as opposed to 4.8 in/hr —does not require revision.
(Rev. 1) Addressed. Unchanged.
14. Recommend include SUB201600066 in ROAD Plan title. (Rev. 1) Not addressed; recommend include
SUB201600066 in ROAD Plan title, if possible, in support of unpredictable plan retrieval, identification,
inspection, or bonding needs, or to help clarify and support administrative tracking and reporting tasks.
(Rev. 2) Addressed.
Thank you.
SUB 20600066—Woodlawn—RP-080816rev2