HomeMy WebLinkAboutOB 1 MEDIAN OPENING 12-02-91OLD BUSINESS NO. 1
12-2-91
A G E NN"' D A
inter -Com '
DATE: NOVEMBER 25, 1991
TO: WILLIAM A. HUSTON, CITY MANAGER
FROM: PUBLIC WORKS DEPARTMENT/ENGINEERING DIVISION
SUBJECT: FEASIBILITY STUDY TO PROVIDE - A MEDIAN OPENING ON TUSTIN RANCH
ROAD AT PALERMO
RECOMMENDATION
The pleasure of the City Council.
BACKGROUND
At their meeting of November 18, 1991, the City Council directed
staff to submit a report for the council meeting of December 2,
1991 which investigates the possible construction of a left turn
pocket within the existing raised median on Tustin Ranch Road at
Palermo for access into the Almeria Development.
A report investigating such a median opening had previously been
prepared by City staff at the request of the City Council. That
report had been presented to the City Council at their meeting of
December 17, 1990 and was received and filed by a unanimous vote of
4 to 0. A copy of that report has been attached for reference.
DISCUSSION
The report previously prepared for this matter would still be
relevant including the typical construction costs that could be
expected with such an endeavor. Currently, no City funds have been
appropriated in the 1991-92 budget for this work. If the City
Council were to approve of such a project, then detailed plans and
specifications would have to be prepared, and the project put out
to a formal public bidding process for actual construction.
It should be noted that Assessment District (A.D.) funds are being
utilized on the Tustin Ranch Road median at Auto Center.Drive to
accommodate the extension of Tustin Ranch Road to the south.. This
use is considered part of the initial construction for the overall
East Tustin A.D. planned infrastructure improvements.
1-17
Robert S. Ledendecker
Director of Public Works/
City Engineer
RSL:kIb:LFTTURN
Attachment
/ -.")
Dana R. Kasdan�
Engineering Servic s Manager
- GATE:
TO:
FROM:
SUBJECT:
1 17_q o
DECEMBER 11, 1990
WILLIAM A. HUSTON, CITY MANAGER
Inter - Com
PUBLIC WORKS DEPARTMENT/ENGINEERING DIVISION
FEASIBILITY STUDY TO PROVIDE A MEDIAN OPENING ON TUSTIN
RANCH ROAD AT PALERMO
RECOMMENDATION:
The pleasure of the City Council.
BACKGROUND
The City Council at their November 19, 1990, requested staff to
investigate the feasibility of cutting the raised median on Tustin
Ranch Road at Palermo to provide an opening for left turn access
into the Peters Tract (South of Irvine Boulevard).
A traffic impact study was conducted to determine the traffic and
circulation impacts associated with the Peters Tract. This tract
consists of 118 single family detached homes and is located on
Tustin Ranch Road between Irvine Boulevard and Parkcenter Lane.
Two access locations are provided for the tract, one at Palermo
from Tustin Ranch Road and the other one off Parkcenter Lane via
Monterey Street/Triburon Way. .
Irvine Boulevard is a six -lane Major Arterial roadway located to
the north of the Peters Tract. This arterial currently services
traffic volumes on the order of 34,000 per day. Tustin Ranch Road
also has six lanes of traffic and is classified as a Major Arterial
roadway. Presently, this roadway services daily traffic volumes of
3,000 vehicles per day. Parkcenter Lane is a local collector with
current daily traffic volumes of 11200 vehicles per day.
FINDINGS
The traffic generation potential of the Peters Tract is expressed
in vehicle trip ends, where a trip end is a one-way vehicular
movement either entering or departing the tract. The traffic
generation rates shown herein are based on data published by the
Institute of Transportation Engineers and assumes full occupancy o
the tract. For the purpose of assessing the overall impact of the
tract, trip generation rates and distribution assignments have been
used for a "worst case" analysis. Table 1 presents the traffic
generation relative to the existing Peters Tract.
Page 2
TABLE 1
TRIP GENERATION PROJECT TRAFFIC
DAILY AM PEAK HOUR PM PEAK HOUR
2 -WAY INBOUND OUTBOUND INBOUND OUTBOUND
Units RATE/TRIPS RATE/TRIPS RATE/TRIPS RATE/TRIPS RATES/TRIPS
Single 10.062/1,188 .204/24 .55/65 .633/75 .372/44
Family
Detached
Homes
118 Units
* DATA SOURCE is ITE- Trip Generation, 4th Edition, 1987.
As shown in the table this project area generates a total of 1,188
vehicles trips per day, evenly divided between inbound and outbound
movements. During the AM peak hour, a total of 89 trips would be
generated (24 inbound- 65 outbound) while the PM peak hour would
generate an estimated total of 119 trips (75 inbound- 44 outbound) .
The distribution and assignment of project traffic was based on a
review of current peak hour travel patterns. Exhibit 1 shows the
traffic distribution for the Critical AM, and PM peak hours as well
as 24 hour daily volumes. The total trip generation was analyzed
for each access entry point as'a worst case scenario. Exhibit 1
also shows that during the critical PM peak hour, 41 left turns
would be generated if a left turn pocket was to be constructed on
Tustin Ranch Road. The construction of this left turn pocket is
physically possible with the construction cost estimated at $45,100
as shown in Exhibit 2.' A detail sketch of the left turn pocket
design is shown in Exhibit 3. This design would restrict left turns
out of Palermo.
However, it should be pointed out that this left turn would be
uncontrolled which in turn would require a yield to on -coming
traffic. The current volume of traffic on Tustin Ranch Road is
approximately 3,000 vehicles per day. Future traffic projections
shown that this street will increase to 26,000 vehicles in the year
1995 and to 32,000 vehicles by the year 2010. Future traffic
volumes for Irvine Boulevard will exceed 40,000 per day by the year
2010. As soon as the Tustin Ranch Road interchange with the Santa
Ana Freeway is completed, the right turn demand off of Irvine
Boulevard will increase dramatically.
Page 3
This increased demand will utilized the right turn over lapping
green arrow currently installed at the intersection of Irvine and
Tustin Ranch Road. The utilization of this right turn arrow in
combination with future traffic volume demands on Tustin Ranch Road
will create insufficient gaps to allow left turns into Palermo
without excessive delays.
Traffic wishing to enter the Peters Tract can currently enter via
a controlled traffic signal at Parkcenter Lane. This entry adequately
provides access to the project area without the installation of an
additional left turn pocket on Tustin Ranch Road. It is the Staff's
feeling that money required to install the additional left turn pocket
should be used on other priority projects. There is no funding
available in the 1990-91 Budget for this project, and it has been
determined that Assessment District No. 85-1 funding could not be
utilized on this project.
Bob Ledendecker
Director of Public Works/City Engineer
BL: SD: cr
dA.,O- Orr
Sandra Doubleda
Y
Engineering Consultant
010 IRVINE
O p
IO
O
SFr
CIL
&
000�
jQP
BOULEVARDx
— -
V
C ~
;—�— o
�
m
w
I (
cc
N
t
W
U
Q
W
O
>
O
m
_
o
>
VENTIA
cd
le►-
d
0
o
CD o
`
>
rti
a
W
_
m
Q
0 `
= O
W
�
F-
5
N
J~
Z
CARRERA
`
Z
L
40
FZ--
D
O Z1
D
a:F-
�e
�.`
��
�� '►�w
V ZQ
Cf)IJ..
�I/co
l,00 69A
H U
PALERMO
MARSELINA
�
�N
7
r
0
5°'
e
60
SFr
CIL
&
000�
jQP
EXHIBIT 2
CONSTRUCTION COST ESTIMATE
Tustin Ranch Road @ Palermo
Left Turn In Only Median Opening
12/10/90, by Jeff Chen
Description
M
Unit
Quantity Price Cost
TOTAL
Total Construction Estimate
Remove existing type A curb & gutter.
is
is
$4,000
1.
Engineering Design (20%)
Landscape and modify existing systems.
Construction Survey
31000
Inspection
2.
Construct type A curb & gutter
300 if
$20/If
$62000
(12" gutter, 8"cf).
3.
Construct 0.40' A.C.
70 to
$8,0/tn
$52600
4.
Construct 1.65' Class II base
255 to
$20/tn
$5,100
5.
Construct 4" thick stamped concrete
525 sf
$6/sf
$3,150
paving.
6.
Construct mow strip & 6" thick stamped
130 sf
$8/sf
$17040
concrete drive apron and paving.
7.
Construct new striping and install new
is
is
$17500
signs and pavement markers.
8.
Mobilization
Is
Is
$17500
9.
Traffic control & lane closure
Is
Is
$1,500
TOTAL
Total Construction Estimate
$30,000
Contingency (10%)
3,000
Subtotal
$331000
Engineering Design (20%)
69600
Construction Survey
31000
Inspection
2,500
TOTAL $457100
0
U
o
.
N
17—
v
aC
z
w
s
r
eL
v
fl
�
v
0
x
0
+1
-HI
(9
O z
z
Lu
� a
w
0
z
Q Q
w
z
0 • O
� z
Up
Z ~
w
J
Z o
� w
V)
U) O
0-
0 O
ac
CL
Go
X
W
U
N
17—
v
r
x
0
+1
-HI
(9
O z
z
Lu
� a
w
0
z
Q Q
w
z
0 • O
� z
Up
Z ~
w
J
Z o
� w
V)
U) O
0-
0 O
ac
CL
Go
X
W