HomeMy WebLinkAbout14-04 Traffic Impact AnalysisA Traffic Impact Analysis of the
Haggerty Property
Frederick County, Virginia
Patton Harris Rust Associates, pc
Engineers. Surveyors. Banners. Landscape Architects.
PHRA
Located in:
Prepared for:
Dave Holliday
205 North Cameron Street
Winchester, VA
22601
Prepared by:
208 Church Street, S.E.
Leesburg, Virginia 20175
T 703.777.3616
F 703.777.3725
September 22, 2004
OVERVIEW
Report Summary
Methodology
EXISTING CONDITIONS
Patton Harris Rust Associates, pc (PHR +A) has prepared this document to
present the traffic impacts associated with the proposed Haggcrty Property development to
be located southeast of the Route 7 (Berryville Pike)/Valley Mill Road (Route 659)
intersection in Frederick County, Virginia. The proposed project will include a total of
180 single family detached units, 60 apartment units, and 60 townhouses with sole- access
provided along the Eddy's Lane via Valley Mill Road. The development will be built -out
in a single phase by the year 2007. PHR +A has provided Figure 1 to illustrate the location
of Haggerty Property with respect to the surrounding roadway network.
The traffic impacts accompanying the Haggcrty Property development were
obtained through a sequence of activities as the narratives that follow document:
Assessment of background traffic including other planned projects in the area of
impact,
Calculation of trip generation for the proposed Haggerty Property development,
Distribution and assignment of the Haggerty Property generated trips onto the study
area roadway network,
Analysis of capacity and level of service using the newest version of the highway
capacity software, HCS -2000, for existing and future conditions.
PHR +A conducted AM and PM peak hour manual turning movement counts at the
intersections of Route 7 /Valley Mill Road and Valley Mill Road /Eddy's Lane in Frederick
County, Virginia. Additionally, PHR +A counted the eastbound u-tuming volume at the
intersection of Route 7 /Redbud Road since planned improvements would require this
movement to be diverted to the Route 7 /Valley Mill Road intersection in the future. In
order to determine the ADT (Average Daily Traffic) along the study area roadway links, a
conservative "k" factor (thc ratio of PM peak hour traffic volumes to 24 -hour traffic
volumes) of 10% was assumed.
Figure 2 shows the existing ADT and AM /PM peak hour traffic volumes at the
intersections of Route 7 /Valley Mill Road and Valley Mill Road /Eddy's Lane. Figure 3
shows the respective existing lane geometry and AM/PM peak hour levels of service. All
traffic count data and HCS -2000 levels of service worksheets are included in the Appendix
section of this report.
A Traffic Impact Analysis of the Haggerty Property
September 22, 2004
Page 1
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Figure 1
Haggerty Property
Vicinity Map
A Traffic Impact Analysis of the Haggerty Property
September 22, 2004
Page 2
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Figure 2
Existing Traffic Conditions
A Traffic Impact Analysis of the Haggerty Property
September 22, 2004
Page 3
7
No Scale
;J\
h
1 JM
Cl
Unsignalized
Intersection
Unsignalized
Intersection
Weekday AM(Wcckday PM)
*Denotes Critical Unsignalized Movement
LLT
r Figure 3
Existing Lane Geometry and Level of Service
A Traffic Impact Analysis of the Haggerty Property
September 22, 2004
Page 4
Code Land Use
Amount
In
AM Peak Hour
Out Total
In
PM Peak Hour
Out Total
ADT
Red -Bud Run
210 Single Family Detached
300 units
55
165
219
182
107
288
3,000
Total
55
165
219
182
107
288
3,000
Toll Borthers- Eddy's Lane
210 Single Family Detached
80 units
16
49
65
55
32
88
800
Total
16
49
65
55
32
88
800
Other Developments along Channing Drive
210 Single Family Detached
300 units
55
165
219
182
107
288
3,000
230 Townhouse/Condo
130 units
11
53
64
50
25
75
1,131
820 Retail
120,000 SF
107
68
175
339
367
706
7,645
Total
172
286
458
570
498
1,069
11,776
Fieldstone Development
210 Single Family Detached
63 units
13
40
54
45
26
71
630
230 Townhouse/Condo
207 units
16
77
92
73
36
109
1,801
Total
29
117
146
118
62
180
2,431
Chadwell Property
210 Single-Family Detached
30 units
8
23
30
23
13
36
300
Total
8
23
30
23
13
36
300
2007 BACKGROUND CONDITIONS
PHR +A increased the existing traffic volumes along Route 7, Valley Mill Road and
Eddy's Lane using a conservative growth rate of five percent (5 per year through Year
2007. The eastbound u- turning volumes from the Route 7 /Redbud Road intersection were
then diverted to the intersection of Route 7 /Valley Mill Road to account for the planned
improvements described in the Existing Conditions section of this report. Additionally,
PHR +A included all trips relating to specific future "other developments" located along
Charming Drive and Valley Mill Road as obtained from the report titled: A Traffic Impact
Analysis of Fieldstone, by PHR +A, dated November 21, 2003. Based upon the 7 Edition
of the Institute of Transportation Engineers' (ITE) Trip Generation Report, PHR +A has
provided Table 1 to summarize the 2007 "other developments" trip generation. Figure 4
shows the 2007 background ADT and AM /PM peak hour traffic volumes at the
intersections of Route 7 /Valley Mill Road and Valley Mill Road /Eddy's Lane. Figure 5
shows the corresponding 2007 background lane geometry and levels of service. All HCS-
2000 levels of service worksheets are included in the Appendix section of this report.
Table 1: Back Tri Generation
A Traffic Impact Analysis of the Haggerty Property
September 22, 2004
Page 5
r Figure 4
2007 Background Traffic Conditions
A Traffic impact Analysis of the Haggerty Property
September 22, 2004
Page 6
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7
No Scale
O
(B)C
ri c
Suggested
Improvements
(Cc'
Signalized
Intersection
LOS =C(C)
eta B (C)
O
*(D)B
Ric
(0
SITE
rn
Unsignalized
Intersection
40 se
Unsignalized
Intersection
eRYville P
Weekday AM(Weekday PM)
*Denotes Critical Unsignalized Movement
2007 Background Lane Geometry and Level of Service
A Traffic Impact Analysis of the Haggerty Property
September 22, 2004
Page 7
PROPOSED TRIP GENERATION
PHR +A determined the number of trips entering and exiting the site based upon a
total development of 180 single family detached units, 60 apartment units, and 60
townhouses. Using the 7 Edition of ITE's Trip Generation Report, Table 2 was prepared
to summarize the trip generation results for the proposed Haggerty Property development.
Table 2: Proposed Trip Generation
Code
AM Peak Hour PM Peak Hour
Land Use Amount In Out Total In Out Total ADT
Haggerty Property
210 Single Family Detached 180 units 34 102 135 115 67 182 1,800
220 Apartment 60 units 7 27 33 33 18 51 511
230 Townhouse/Condo 60 units 6 28 34 26 13 40 522
Total 46 157 203 174 98 272 2,833
TRIP DISTRIBUTION AND TRIP ASSIGNMENT
The distribution of trips was based upon local travel pattems for the road network
surrounding the proposed site. PHR +A utilized the trip distribution percentages shown in
Figure 6 to assign the Haggerty Property trips (Table 2) throughout the study area
roadway network. Figure 7 shows the respective development generated AM /PM peak
hour trips and ADT assignments.
2007 BUILD OUT CONDITIONS
The Haggerty Property assigned trips (Figure 7) were added to the 2007
background traffic volumes (Figure 4) to obtain 2007 build -out conditions. Figure 8
shows the 2007 build -out ADT and AM /PM peak hour traffic volumes at the intersections
of Route 7/ Valley Mill Road and Valley Mill Road /Eddy's Lane. Figure 9 shows the
respective 2007 build -out lane geometry and AM /PM peak hour levels of service. All
HCS -2000 levels of service worksheets are included in the Appendix section of this report.
CONCLUSION
The traffic impacts associated with the proposed Haggerty Property development
are acceptable and manageable. The intersection of Valley Mill Road /Eddy's Lane will
maintain acceptable levels of service "A" during 2007 build -out conditions. The
intersection of Route 7 /Valley Mill Road will operate with levels of service of "F" during
both the 2007 background and build -out traffic conditions indicating a negligible impact
from the proposcd development. The addition of a traffic signal during would increase the
level of service to "C" or better.
A Traffic Impact Analysis of the Haggerty Property
September 22, 2004
Page 8
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Figure 6
Trip Distribution Percentage
A Traffic Impact Analysis of the Haggerty Property
September 22, 2004
Page 9
r
No Scale
OADT
AM(PM)
Figure 7
Development- Generated Trip Assignments
A Traffic Impact Analysis of the Haggerty Property
September 22, 2004
Page 10
Figure 8
2007 Build out Traffic Conditions
A Traffic Impact Analysis of the Haggerty Property
September 22, 2004
Page 11
No Scale
O
Signalized
Intersection
LOS =C(C)
(B)C
Suggested
Improvements
t
O
�Ie p
*(D)B
4 SITE
to
Unsignalized
w Intersection
A,
Unsignalized
Intersection
Weekday AM(Weekday PM)
*Denotes Critical Unsignalized Movement
F Hit
Figure 9
2007 Build -out Lane Geometry and Level of Service
A Traffic Impact Analysis of the Haggerty Property
September 22, 2004
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