HomeMy WebLinkAboutSUB202100124 Other 2021-07-01 (2)SHIMP ENGINEERING, P.C.
Design focused Engineering
July 1, 2021
Adam Moore
Virginia Department of Transportation
701 Vdot Way
Charlottesville, Virginia 22911
RE: SUB2021-000XX Proffit Road Townhomes South — Road Plan
Turn Lane Warrant Analysis
Dear Mr. Moore,
Please find attached a warrant analysis for Proffit Road Townhomes South. The final site plan proposes
the development of 40 townhome units on Proffit Road, between Pritchett Lane and U.S. Route 29.
The following items are included with this report:
• VDOT 2019 Traffic Data
• ITE Trip Generation Summary
• Warrant Analysis Exhibits
Please note that this analysis includes new trips generated by Proffit Road Townhomes North (SDP2020-
28). The attached analysis shows that a right nor left turn lane is warranted with this development.
If you have any questions, you may contact me at justin(alshimp-engineerine.com or by phone at 434-
953-6116.
Regards,
Justin Shimp
Shimp Engineering, P.C.
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1. VDOT 2019 Traffic Data
The following table provides VDOT 2019 traffic data on the 0.54-mile segment from Pritchett Lane
to U.S. Route 29. The speed limit on this portion of Proffit Road is 35-mph. For further accuracy,
estimated trips generated by the maximum 80-unit townhome development immediately north of the
property, Proffit Road Townhomes North (SDP2020-28) has been added to the 2019 AADT and
accounted for in this warrant analysis.
Proffit Road
2-lane highway
0.54-mile segment
35-m h
AADT 2019
8000
ITE Trip Generation Daily
Total SDP2020-28
564
AADT Total
8564
K
0.11
D
0.543
Peak Hour Total
942
Peak Hour Direction A
512
Peak Hour Direction B
430
2. ITE Trip Generation Summary
ITE
Code
Independent
Variable
AM
PM
Daily
Total
In
I Out
Total
In
Out
Total
Low -Rise
220
40 Units
5
15
20
16
10
26
262
Multifamily
With 40 units proposed, there could be up to 5 trips occurring in the morning peak hour and 16 trips
occurring in the evening peak hour. Based on the directional factor given by the VDOT 2019 AADT,
right and left turns are likely evenly split in the eastern and western direction. Based on the data
above, potential turning movements are highest in the evening, with 8 right tuns and 8 left turns into
the property. The evening scenario was analyzed, when the highest number of turns would occur.
Turns In
Advancing
Opposing
% of Left Turns
Morning Right
3
433
-
-
Morning Left
3
514
433
0.5%
Evening Right
8
520
-
-
Evening Left
8
439
520
2%
3. Warrant Analysis Exhibits
Given the existing background traffic, including Proffit Road Townhomes North, and the new trips
generated by Proffit Road Townhomes South, right and left turn lanes are not warranted with this
development.
WARRANT FOR LEFT -TURN STORAGE LANES ON TWO-LANE HIGHWAY
800
= 700
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500
0
0
400
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d 200
0
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VA ADVANCING VOLUME (VPH)
FIGURE 3-4 WARRANT FOR LEFT TURN STORAGE LANES ON TWO LANE
HIGHWAY
PHV APPROACH TOTAL VEHILIEa PER I R
FIGURE 948 WARRANTS FOR RIGHT TURN TREATMENT (24ANE HIGHWAY)
Appropriate Radius required at all Inteseotiure and EnVances (Cornmercial or Prviale).
LEGEND
PHV - Peak Hour Volume (also Design Hourly Volume equivalent)
Adlus[ment for Right Turns
For posted speeds at or under 45 mph, PHV right turns > 40, and
PHV total < 300,
Adjusted right turns = PHV Right Turns . 20
K PHV is not known use formula_ PIN = ADT x K x D
K = the percent of AADT oocvmng in the peak hour
D = the percent of traffic in the peak direction of lbw
Not- An average of 11 % for K x D Will suffice.
When rW tun f=Mm are mffwded, aee Fbure 3.1 for design Told :
Rev. 1115