HomeMy WebLinkAboutNB 1 STOP SIGN INSTALL 12-03-90DATE:
TO:
FROM:
NOVEMBER 26, 1990
WILLIAM HUSTON, CITY MANAGER
PUBLIC WORKS DEPARTMENT/ENGINEERING DIVISION
NEW BUSINESS NO. 1
12-3-90
i t
Inter - Com
SUBJECT: REQUEST FOR STOP SIGN INSTALLATION ON YORBA ST. AT BONNER DRIVE
RECOMMENDATION:
Receive and file.
BACKGROUND:
At a previous City Council meeting Helen Edgar requested that the City consider
the installation of stop signs on Yorba St. at Bonner Drive and as a result of
this request, staff was directed to review the intersection for the requested
installation.
This intersection is within the jurisdiction of the County of Orange with respect
to the northerly and southerly legs of Yorba St. and the easterly leg of Bonner
Dr. The westerly leg of Bonner Dr. is within the jurisdiction of the City of
Tustin. City staff initiated and completed the traffic study on the subject
intersection.
DISCUSSION:
The subject intersection was studied for both a four-way stop sign installation
and a traffic signal installation and it was determined that the subject
intersection did not meet the warrants as established in the State traffic
manual.
Attached are pages 4-38 and 4-39 of the State traffic manual outlining the
warrants for stop sign installations and pages 9-5 through 9-8 and 9-11 through
9-13 outlining warrants for traffic signals.
Due to the intersection not meeting the standard warrants for either a four-way
stop sign or traffic signal installation, it is recommended that no further
action be pursued with the County of Orange on this intersection.
Bob Ledendecker
Director of Public Works/City Engineer
BL:cr
Attachments
"8 SIGNS Traffic Manual
3-1987
POLICY
A STOP sign is not a "cure -air' and is not a substitute
for other traffic control devices. Many times the need
for a STOP sign can be eliminated if the sight distance
Is increased by removing the obstructions.
STOP signs shall not be erected at any entrance to an
intersection when such entrance is controlled by an
official traffic control signal, nor at any railroad grade
crossing which is controlled by automatic signals,
gates, or other train -actuated control devices except
as provided in CVC 21355, Stop Signs. The conflicting
commands of two types of control devices are con-
fusing. If traffic is required to stop when the operation
of the stop -and -go signals is not warranted, the signals
should be put on flashing operation with the red flashing
light facing the traffic that must stop.
Where two main highways intersect, the STOP sign or
signs should normally be posted on the minor street to
stop the lesser flow of traffic. Traffic engineering studies,
however, may justify a decision to install a STOP sign or
signs on the major street, as at a three-way intersection
where safety considerations may justify stopping the
greater flow of traffic to permit a left turning movement
STOP signs should not be installed indiscriminately at
all unprotected railroad crossings. The allowance of
STOP signs at all such crossings would eventually breed
contempt for both law enforcement, and obedience to
the sign's command to stop. STOP signs may only be
used at selected rail/highway grade crossings after
their need has been determined by a traffic engineering
study. Such study should consider approach speeds,
sight distance restrictions, volumes, accident records,
etc. This application of STOP signs should be an interim
use period during which plans for lights, gates or other
means of control are being prepared.
Portable or part-time STOP signs shall not be used except
for emergency purposes. Also, STOP signs should not be
used for speed control.
• Multiway STOP signs
The "Multiway Stop" installation may be useful at some
locations. It should ordinarily be used only where
the volume of traffic on the intersecting roads is approx-
imately equal. A traffic control signal is more satisfactory
for an intersection with a heavy volume of traffic.
Traffic Manual SIGNS 4-39
3-1987
POLICY
Any of the following conditions may warrant a multi -
way STOP sign installation:
1. Where traffic signals are warranted and urgently
needed, the multiway stop may be an interim
ti D measure that can be installed quickly to control
/ traffic while arrangements are being made for
the signal installations.
2. An accident problem, as indicated by five or more
reported accidents within a 12 month period of
a type susceptible to correction by a multiway
'L�s D stop installation. Such accidents Include right-
and
ightand left turn collisions as well as right-angle
collisions.
Act APP�o,; Nes
00 fol
iZBq i a 3 y 5 k4i
?o1 03 681 f� 639 �55��37
3. Minimum traffic volumes
(a) The total vehicular volume entering the inter-
section from all approaches must average at
✓��� least 500 vehicles per hour for any 8 hours of
an average day, and
yt•1 ASO S RE�T— Z307,�r' �Qt'r'ieD, '� / .
78 9 t a.3 �it� l�jd"7i
15 3
Iva �� �l E� � �I X%r✓S �Dt-t �
/V Q
The combined vehicular and pedestrian
volume from the minor street or highway must
average at least 200 units per hour for the
same 8 hours, with an average delay to minor
street vehicular traffic of at least 30 seconds
per vehicle during the maximum hour, but
When the 85 -percentile approach speed of
the major street traffic exceeds 40 miles per
hour, the minimum vehicular volume warrant
is 70 percent of the above requirements.
so y .? 5 4 ✓yEs
� OC) 1( '�v � _ y O /U O
• Yield Signs
The YIELD sign (R1-2) assigns right of way to traffic
on certain approaches to an intersection. Vehicles
controlled by a YIELD sign need stop only when nec-
essary
eo-essary to avoid interference with other traffic that
R1=2 is given the right of way.
--------� The YIELD sign shall be a downward pointing, equi-
YIELo lateral triangle having a red border band and a white
interior and the word YIELD in red inside the border
band. The standard size shall be 36 x 36 x 36 inches.
\\� • Warrants for YIELD Signs
Standard 36" The YIELD sign may be warranted:
1. On a minor road at the entrance to an intersection
where it is necessary to assign right of way to the
major road, but where a stop is not necessary
at all times, and where the safe approach speed
on the minor road exceeds 10 miles per hour.
2. On the entrance ramp to an expressway where an
acceleration lane is not provided.
CITY OF TUSTIN
BY DATE d SUBJECT �"� � SHEET NO. —L_ OF—L_
CHKD. BY DATE FILE NO.
V) �cn
J
1-zz
Q
O�
OC
ag �y
.,.E e a 2
Z9,:�2
S
o .
?o
0�
� o
RZ
s N
I
1�
S C
MOT - r'U ft L c
SEG ��-__�__.
/LOTS 1o /Jo h<C-166-ev '
Traffic Manual RAFFIC SIGNALS AND LIGHTii-4G 9-5
12-1986
Figure 9-1 A
TRAFFIC SIGNAL WARRANTS
CALC DATE
r
CHK DATE
DIST CO RTE PM
Major St: Critical Approach Speed mph
Minor St: 72 Critical Approach Speed` mph
Critical speed of major street traffic 2 40 mph -------------------
_ oR RURAL (R)
In built up area of isolated community of< 10,000 pop. --------- ❑
❑ URBAN (U)
WARRANT 1 —Minimum Vehicular Volume
100% SATISFIED YES ❑
NO
150 Feet
80% SATISFIED YES ❑
NO
MINIMUM REQUIREMENTS
(80% SHOWN IN BRACKETS)
U R U I R
APPROACH
/
1 2 or more
LANES Q'
'�
a
Hour
Both Apprchs.
Major Street
500
(400)
35
(2 )
600
(480)
1420
(336)
/ „�
(�
OS
90-5
/
(p�kl
6�
n
q15
8/ 10
Highest Apprch
Minor Street*
15010
(120)
)
200
(160)
140
(112)
* NOTE: Heavier left turn movement from Major Street included when LT -phasing is proposed ❑
WARRANT 2 — Interruption of Continuous Traffic
100% SATISFIED YES ❑
NO
80% SATISFIED YES ❑
NO M
MINIMUM REQUIREMENTS
(80% SHOWN IN BRACKETS)
U R U I R 1'
a
APLPRES H 1 2 or more i �� (1� a�� ��
A`� Hour
Both Apprchs. 750 X525 900 /t� / 7/� 'w/// n3QMajor Street (600) (720} 1(630)
504(� ii C/ 7 /
Highest Apprch 75 153) 100-1 70
Minor Street* (60) ) (80) 1 (56) 5 /2
*NOTE: Heavier left turn movement from Major Street included when LT -phasing is proposed ❑
WARRANT 3 - Minimum Pedestrian Volume 100% SATISFIED YES ❑ NO ❑
80% SATISFIED YES ❑ NO ❑
MINIMUM REQUIREMENTS
(80% SHOWN IN BRACKETS)
U R
Both Apprchs. No Median 600 420 Hour
Major Street 1(480) (336)
Volume Raised 1000 700
4' Median (800) (560)
1 1
Ped's On Highest Volume 150 105
X -Walk Xing Major Street (120) (84)
IF MIDBLOCK SIGNAL PROPOSED ❑
MIN. REQUIREMENT
DISTANCE TO NEAREST ESTABLISHED CRWLK
FULFILLED
150 Feet
N/E ft S/W ft
Yes ❑ No ❑
The satisfaction of a warrant is not necessarily justification for a signal. Delay, congestion, confusion or other
evidence of the need for right of way assignment must be shown.
TS -10A
Traffic Manual TRAFFIC SIGNALS AND LIGHTING 9-7
1i -19N
Figure 9-1 C
TRAFFIC SIGNAL WARRANTS
WARRANT 8 -Combination of Warrants SATISFIED YES ❑ NO A
REQUIREMENT
WARRANT ✓
FULFILLED
TWO WARRANTS
SATISFIED
80%
t - MINIMUM VEHICULAR VOLUME
YES ❑ NO
2 - INTERRUPTION OF CONTINUOUS TRAFFIC `
3 - MINIMUM PEDESTRIAN VOLUME N
WARRANT 9 - Four Hour Volume
Approach Lanes
SATISFIED* YES ❑ NO X
2 or0- J5ef� i
One more �Q-c\/a' X96/ 6'1 Hour
Both Approaches , Major Street
✓
OG,
l jqQ
Highest Approaches , Minor Street
�/
Highest Approaches , Minor Street
';5
' �J
*Refer to Fig. 9-2A (URBAN AREAS) or Figure 9-2B (RURAL AREAS) to determine if this warrant is satisfied.
WARRANT 10- Peak Hour Delay SATISFIED YES ❑ NO
1. The total delay experienced for traffic on one minor street approach controlled by a STOP
sign equals or exceeds four vehicle -hours for a one -lane approach and five vehicle -hours
for a two-lane approach; and
2. The volume on the same minor street approach equals or exceeds 100 vph for one
moving lane of traffic or 150 vph for two moving lanes; and
YES ❑ NO EJ
YES ❑ NO ID
3. The total entering volume serviced during the hour equals or exceeds 800 vph for
intersections with four or more approaches or 650 vph for intersections with three approaches.
YES X NO ❑
WARRANT 11 - Peak Hour Volume
Approach Lanes
SATISFIED* YES ❑ NO C4
2 or e 1 /
One more Awl�/ h� /Hour
Both Approaches , Major Street
OG,
l jqQ
Highest Approaches , Minor Street
�/
';5
' �J
*Refer to Fig. 9-2C (URBAN AREAS) or Figure 9-2D (RURAL AREAS) to determine if this warrant is satisfied.
The satisfaction of a warrant is not necessarily justification for a signal. Delay, congestion, confusion or other
evidence of the need for right of way assignment must be shown.
TS -10C
Traffic Manual dAFFIC SIGNALS AND LIGHTh.s 9-11
12-1986
* 7
I_
Z
a
m ccW W
N C
�Da
mJ�
Cf O Q
izD
O�-
O
O O 0
O O 0
Nt CY) N
HdA—H3VOdddb 3wn1OA HOIH
133d1S UONIW
0
O
0
v
O
O
to
0
0
It
O
0
a
W
U
Q
O
cc
IL
a
Q
S
to
U_
O
H
O
H
W
W
CC
1--
U)
cc
O
= W
a J
d O
Q 0
J
W O
W S
Cr_ Co
CO �
frX
O
W
Q O
Cc J
L _
W~' Ld
2 CO
O _w wLLJ
>--� Z
OCLCL
O
(n a 3:
T m _Z
Cr
W ZQ
Q
W d
JZ
Ui
I J Q
Qcc W
O.a:
w
ii O Q
a. O z
Q
f -
>a:
0
m O
w
O
z
W
Z
Q
J
N
z
Z
esj
w
n
1!1
J
J
Q
w
O
2
cc
Co
w
z
O
N
J
cn
W
O
W
z
ccO
W
Q
N
Q
O
N
O O 0
O O 0
Nt CY) N
HdA—H3VOdddb 3wn1OA HOIH
133d1S UONIW
0
O
0
v
O
O
to
0
0
It
O
0
a
W
U
Q
O
cc
IL
a
Q
S
to
U_
O
H
O
H
W
W
CC
1--
U)
cc
O
= W
a J
d O
Q 0
J
W O
W S
Cr_ Co
CO �
frX
O
W
Q O
Cc J
L _
W~' Ld
2 CO
O _w wLLJ
>--� Z
OCLCL
O
(n a 3:
T m _Z
Cr
W ZQ
Q
W d
JZ
Ui
I J Q
Qcc W
O.a:
w
ii O Q
a. O z
Q
f -
>a:
0
m O
w
O
z
Traffic Manual
Z
Q
Fn
D W W
N X
C) = Q
moa
W
0
Nd
W
CL
TRAFFIC SIGNALS AND LIGI IG 9-13
12-1986
O o 0 0
CO N O
HdA—H3VOaddd 3wn1OA HJIH
133d1S UONIW
O
0
O
0
N
r
O
O
T
O
O
O
I
I
O
O
LO
O
0
O
O
m
Q
w
0
C
J
a
a
0
W
Z
w
W
0
Q
J
CO
`~`^^
vJ
W
I
r
0
F
cc
SZ
I L
W
Z
0
w O
J
J
0 LL
to
-J
r
0 2
W
�-
Z
CL
z
_J
Q >O
Q
J Z
J
,
CO)
a.0
0
LULU
z
_U.
CO
Q
�
0
Q
=z
Q �
U-) Z
O �w
� U
Q
�
/
/Y
coq:
O
w W
z 0 -
Cr. =
J Q
m
t/1 CoW
w
.�
oc
0CC
0
'Q w
N
O
2U)
J
a: Q
W
Cy
CL
O
z
~
Q
Q
_ q:
o
J
W
W
O
z
m
Q
O
N
O o 0 0
CO N O
HdA—H3VOaddd 3wn1OA HJIH
133d1S UONIW
O
0
O
0
N
r
O
O
T
O
O
O
I
I
O
O
LO
O
0
O
O
m
Q
w
0
C
J
a
a
0
J
w
W
0
Q
CO
`~`^^
vJ
W
I
T
0
F
cc
SZ
I L
w
Co Q
0
w O
J
W
0 LL
~
0 2
W
cc D
Z
CL
CO �
_J
Q >O
W W
J Z
a.0
0
m
_U.
CO
�
0
>
J
=z
Q �
U-) Z
O �w
� U
Q 0
0
coq:
J
w W
z 0 -
Cr. =
J Q
F-
t/1 CoW
w
Q
0CC
0
'Q w
2U)
J
a: Q
0
CL
O
O z
~
>
Q
_ q:
o
O
W
F-
O
z
CN,
� 40.
C, C,
ov"
0
13
19
a/so/,;F0
,2,. 00 0 0
81
93?
6,2S
- -� 3%
0-1
/0100
IJ
3-37
-2-?6
C20
6100
73y_
eo
Oct
03
0
CN,
� 40.
C, C,
ov"
0
13
19
a/so/,;F0
,35
81
93?
6,2S
- -� 3%
0-1