HomeMy WebLinkAboutZMA201600022 Study 2016-12-14PROJECT MANAGEMENT
SHIMCIVIL ENGINEERING
LAND PLANNING
ENGINEEKINGa
December 12, 2016
Mr. Adam Moore, P.E.
Mrginia Department of Transportation
Regarding: Avon Street Ext. Multi -Family
Left- Turn Warrant Analysis
Mr. Moore,
Please find enclosed a left -turn warrant analysis for the addition of Avon Street Extended Multi -Family at Avinity
Drive. Our conclusions are based off of the previous study by Ramey Kemp &Associates, Inc. Because the
increase in traffic was for this development is minimal, we did not see the need to run the Synchro analysis
performed with the prior study.
The following items are included with this report:
• Warrant Analysis Exhibit
• 0l1SS Trip Generation Reports
• ITE Trip Generation Summary
• Level -of -Service Summary from Ramey Kemp & Associates
Our analysis shows that no expansion of the left turn lane is warranted for this project.
If you have any questions you may contact me at kendra ashirrp-engineedrig.com or Justin Shimp, P.E. may be
reached at: justin@3hirrp-engineering.com or by phone at 434-953-6116.
Best Regards,
Kendra Patrick
Shimp Engineering, P.C.
—-------------------------- 309(503) Legend
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Avon 5t. Ext. Multi -family SHIMPENNYEERIY6 P.C.
Warrant Ana 1, I sExhibit G ENGINEERING-L4ADPL 4NNING -PROJECT MANAGEMENT
December 12, 201G
40 0 40 80 120 201 E. MAIN ST. SUITE M PHONE: (434) 227-5140
CHARLOTTESVILLE, VA 22902 JUSTIN®SHIMP-ENGINEERING.COM
Scale: 1 "=40'
Avinity Drive
OTISS Report
Apartment
(220)
Average Vehicle Trip Ends vs: Dwelling Units
On a: Weekday
Number of Studies: 88
Avg. Numberof Dwelling Units: 210
Directional Distribution: 50% entering. 50% exiting
Average Rate Range of Rates Standard Deviation
6.65 127 - 12.50 168
Data Plot and Equation
All calculated values are based on the selected Private Data Set.
800
700
600
Soo
r
c
w
n
a
400
a
L
d
a 300
i
200
100
0
X = Number of Dwelling Units
X Actual Data Points o Omitted Data Points Fitted Curve - - - - - - Average Rate
To zoom into the graph, drag the mouse to select the desired area.
To zoom out, right -click in the graph.
Avinity Drive
OTISS Report
Apartment
(220)
Average Vehicle Trip Ends vs: Dwelling Units
On a: Weekday,
A.M. Peak Hour of Generator
Number of Studies: 83
Avg. Number of Dwelling Units: 230
Directional Distribution: 29% entering, 71 % exiting
Average Rate Range of Rates Standard Deviation
0.55 0.10-1.08 0.18
Data Plot and Equation
All calculated values are based on the selected Private Data Set.
40
30
F-
1
10
0
X
...................................:.................X
/,/"x
24
X
X = Number of Dwelling Units
X Actual Data Points o Omitted Data Points Fitted Curve • - - - - - Average Rate
To zoom into the graph, drag the mouse to select the desired area.
To zoom out, right -click in the graph.
Avinity Drive
OTISS Report
Apartment
(220)
Average Vehicle Trip Ends vs: Dwelling Units
On a: Weekday,
P.M. Peak Hour of Generator
Number of Studies: 85
Avg. Number of Dwelling Units: 229
Directional Distribution: 61 % entering, 39% exiting
Trip Generation per Dwelling Unit
Average Rate Range of Rates Standard Deviation
0.67 0.10 - 1.64 0.23
Data Plot and Equation
AN calculated values are based on the selected Private Data Set.
s0
40
N
r
nu .L 30
v
a
m
a
u 20
1'
10
0
.`
x
..................
...........................................
/-,
.................... .....
X.....................
X......................
/ x
...............
................................ X.......
•
.................................................:............X..................
1
24
X = Number of Dwelling Units
X Actual Data Points o Omitted Data Points Fitted Curve • — — — — — Average Rate
To zoom into the graph, drag the mouse to select the desired area.
To zoom out, right -click in the graph.
Updated Proposed Traffic -Weekday
ITE Trip Generation~ 9th Edition
AM
PM
Weekday
Peak
Peak
Land Use
Daily Traffic
Hour
Hour
(ITE Code)
Size
(vpd)
(vph)
(vph)
Enter
Exit
Enter
Exit
Enter
Exit
Single -
Family
39
Homes (210)
homes
221
221
9
28
28
17
Townhomes
147
(230)
homes
476
476
13
61
58
29
*Apartments
(220)
24 apts
80
80
4
10
10
7
Total
777
777
26
99
96
53
Percent Increase
11%
11%
18%
11%
12%
15%
I 71'
The table above shows the updated ITE Trip Generation for Avinity Drive. These values were further broken into left
and right turns (shown in the Warrant Analysis Exhibit) based on the ratio of left to right turns from the previous study.
Table 4
bevel -of -Service Summary tilr Avan Street at AYinity Drive R"nsignaIized)
AM PEAK HOUR
PM PEAK HOUR
CONDITTON
LANE
GROUP
Lane
Queue
Overall
Lane
Queue
Overall
LOS
(a)
D � Y)
LOS
{R]
(Delay)
'hr[3LlR
B
51
B
3
Existing 2014
T
Traffic Conditions
NBB
N/A
N/A
A
'-
S8T
-
-
-
-
WBUR
B
B
3
No -build 2016
Traffic Conditions
NBT
NA
'
NIA
SBL
A
SBT
WBUR
B
=I1
a
Build 2016
NBT
-
z
NIA
z
NJA
Traffic Conditions
BR
SBL
SBT
Lcvcl of service for minor appmaclL
HCM tntnhodology does not provide lane group or overall LOS, delay, and queue lengths for major si m" through move hots or
ngjr[ tarns at unsigoalim-d inten&-tions.
The table above is from a Traffic Impact Analysis report by Ramey Kemp & Associates, Inc. As shown, the queue for
a southbound left turn is at most an average of/4of a car. The existing left turn lane is in excess of 150 feet. Because
the increase in trips resulting from the new apartment complex is only 110/c,18%, we can conclude that there is no
need for an expansion of this turn lane.