HomeMy WebLinkAbout20100119 - VIII-A-3MEMO
To: Honorable Mayor and City Council
From: Tom Montgomery
Date: January i3, 2010
Re: Pleasant Drive and South Frontage Road Intersection -Intersection
Control Evaluation Study Results
The Pleasant Drive and South Frontage Road intersection is part of the
larger Pleasant Drive reconstruction proposed as part 2oio Street Reconstruction
Project. SEH Consulting was hired conduct an intersection control evaluation
study to determine what level of traffic control is warranted at this intersection.
The study is recommending installation of 4-way STOP signs and modifications
to traffic and turning lanes.
Traffic Signals
Although the original Marketplace development west of Pleasant Drive
predicted the need for traffic signals to be installed at the Pleasant Drive/South
Frontage Road intersection; the current SEH study shows existing and project
future traffic volumes will not meet traffic signal warrants.
Roundabout
Roundabout warrants are met with existing traffic volumes, and a
roundabout intersection would move traffic more efficiently with fewer delays
than a 4-way STOP. However, roundabout construction would cost
approximately $500,000 more than a 4-way STOP intersection. Based on the
large incremental cost difference, 4-way STOP control is recommended. I have
enclosed a copy of the roundabout layout for your information.
Existing 2-way STOP Control
Currently, the overall intersection operates at a Level of Service (LOS) A
during peak hours, though some turning movements drop to a LOS C. A LOS D
typically represents the lowest acceptable intersection operation standards. It
would appear that the intersection is functioning quite well with the existing 2-
waySTOP control. However, the crash history shows 25 accidents at this
intersection during the five year period from January 2003 to
December of 200. This translates to an accident rate of
1.1/million vehicles, which is well above the o.2/million vehicle -~ a ~~~~,
average for similar intersections in the metro area. A safety _~t~~ " ~'~
,~
^~ ~ - ~
-a~'
.~
-'~' r„
analysis shows that a 4-way STOP control could reduce the accident rate by
almost 50 % .
Turning Lanes
The traffic models indicated some problems with the existing traffic lanes
both at the South Frontage Road and the Hwy 55 intersections. Queues for both
north and south bound traffic under projected 203o traffic volumes could begin
to exceed the existing lane capacities. The study is recommending expanding the
northbound Hwy 55 intersection right turn lane and southbound South Frontage
Road right turn lane to provide additional capacity (see enclosed drawing).
With the increased width of Pleasant Drive at the South Frontage Road
intersection, the study is also recommending installation of center islands so that
STOP signs can be installed at both the right hand side of the road and on the
center island. A center island is also recommended on the west side of the South
Frontage Road intersection to better channel traffic flow.
Council Action Requested
The recommendations from the SEH study will be incorporated into the
proposed Pleasant Drive reconstruction plans. No Council action is needed at
this time.
m
0
T
n
~i
a ° ~,.~
~.
n
}1 !!~
~#
',y
~.
SS
- `~:
r
r
'' ~ ~ I
J ~ ii~~
v ~ ~p ~'; 'fir 1~~ ~l
~ "gyn. '_
v R
~_ ~ nom,
'~ _ ~ ~t~
'' -
r . ~" `.~
'" " ~~ ..
m ~! - '~
~ ~ ~
~y ~~
~~
~~"~'"
~•
a' ~
0~
V
r1~~0 ~ ~.
.s0
~~
tiF
'~a
tir
~~F
~~
e
M r
~,
i~
? ~ ,
~ ~
R ~ ~ ,~
d
~'
~ k
°i ~ k i~ '~
~ p
J~ f~ I.
r:
L
~& ~
w ~.
U
/ -
z 1• T
C~
~ O ~ ..
LEGEND ~ '
°' ~ 50 0 50 100
Q
Q LANE CONFIGURATION ~ ~ Sale z5 feet
°~ ~
N YIELD YEILO SIGN J
~, a
a ~.
PROJECT : HASTI 110329
° PROPOSED ROUNDABOUT LAYOUT
FIGURE 5
DATE : 11/23/2009 PLEASANT DR. & SOUTH FRONTAGE RD. ICE STUDY
`~ HASTINGS, MINNESOTA
~,
0
a~ _
~ '~:,~` ._ a '~ r~.~i~~,~ ~) v.
.~ ~j ~r + ~. a Ir 1
e..
~" i ~,~ * .
.i ~ ~,
V f
z
y
~, ~ _
~,~ ~ w
. SS
n ~~ ~ , .~
v ~ '~
~ ~ ~~ ~
r
3 S i~
~ a~ _~ -
li
~I
i._ ~~j...._ e
i 9
• ~
a~
~~
i ~ ~ ~
I - d ~ ~ ~ _
/r ~
F
_~
a`w
~ ~ ,~~
d~
.~
~. E t
~~ ~ ~ ,
,~V` ,,~
,, ~ n
M ~ .t ~! ~1
r -
i
'i~~~ 1
~~ ~ ~~ ~ -
^,~7 d
• ~
n ~ ~ y
i~
~!
f~
h
.+
!!
50 0 50 100
LEGEND ~ ~ ' p
m ~r ~~
scale P5 feet
l ANE CONFIGURATION a 3
D PROPOSED ROADWAY ~ ®.e
i ®PROPOSE D M I ~ ~& OVE RL AY Q ~.,
l ~
~ RAISED MEDIANS CURDS ~ ~ ~~ ~~ ~~~~ ~~~~-~ ~ ~ ~ ~ ti
a ~ Q
W -~ ,~
n D CONCRE TE S I DEWAI KS ,, ° ~ ~ ~ ~ * ~~`
PROPOSED LAYOUT FOR TWO-WAY STOP
° PROJECT ; HASTI 110329
~ OR ALL-WAY STOP ALTERNATIVE B FIGURE 7
'~~~ DATE 12/7/2009 PLEASANT DR. & SOUTH FRONTAGE RD. ICE STUDY
HASTINGS, MINNESOTA