HomeMy WebLinkAbout5.2 Amador Valley Blvd. Speed Limit 590 -2-o
CITY OF DUBLIN
AGENDA STATEMENT
CITY COUNCIL MEETING DATE: May 29, 1984
SUBJECT Amador Valley Boulevard Speed Limit
EXHIBITS ATTACHED Traffic Engineer ' s report dated May 9 , 1984
Ordinance Establishing Traffic Regulations
RECOMMENDATION tJ/��#"' Acce t Traffic Engineer ' s Report waive the reading and
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adopt ordinance on an urgency basis
FINANCIAL STATEMENT: Minor costs for the posting of signs indicating that
the speed limit is enforced with radar . The cost of a radar unit is
approximatley $2 , 400 . One unit will be purchased with monies received from
Office of Traffic Safety grant upon approval .
BACKGROUND On February 27 , 1984 , the City Council conducted a
public hearing and approved a traffic study of Amador Valley Boulevard. The
study concentrated on the area between Dougherty Road and Village Parkway .
The City Council adopted Ordinance 6-84 , which established vehicle weight
limits and stop signs at the intersection of Penn Drive and Amador Valley
Boulevard. The City Council concurred with the Traffic Engineer ' s
recommendation that the speed limit be retained at 25 miles per hour .
Legal Requirements
The use of radar as an enforcement tool is regulated by the State Vehicle
Code . The current law requires a municipality to conduct an engineering and
traffic study on streets where radar is used to enforce speed limits . The
results of this study are to be used to establish the speed limits . The
surveys and the resulting speed limits are valid for five years . The survey
must include a study of the prevailing speeds, accident records, and
conditions not readily apparent to the driver . Upon approval of this report
by the City Council a copy must be provided to the court which presides over
vehicular citations .
Attached is a report from Chris Kinzel , Traffic Engineer. The report
includes a review of the areas required for an engineering and traffic
survey, under provisions of the vehicle code . This report concludes that a
25 miles per hour speed limit is appropriate and makes the required findings
to justify this limit . The report meets the requirements of the California
Vehicle Code to allow radar enforcement on the portion of Amador Valley
Boulevard which is included in the survey .
The City Council should be aware that an engineering and traffic study is
scheduled to be conducted on approximately 15 streets throughout the City .
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COPIES TO:
ITEM NO .
0
The funding for this study is included in the City of Dublin ' s pending
Office of Traffic Safety grant application . This will result in a
comprehensive document establishing speed limits throughtout the City. It
will also be more efficient to review the streets at one time, given the
requirement of a review every five years if radar enforcement is utilized.
Recommendation
It is recommended that the City Council approve the Traffic Engineer ' s
report and adopt the Ordinance Establishing Traffic Regulations . This
ordinance will take effect immediatley due to its relation to the protection
of vehicular and pedestrian safety.
In . addition, Staff recommends that the City Council authorize the posting of
signs indicating that the speed limit is radar enforced. These signs will
only be posted after radar units are actually being utilized and may be
completed under our existing County maintenance contract. In accordance
with previous City Council direction, staff placed an order for the radar
equipment, and is awaiting delivery.
MEMORANDUM
DATE: May 10, 1984
TO: Richard Ambrose, City Manager
FROM: Chris D. Kin zel
SUBJECT: Amador Valley Boulevard Speed Limit
The California Vehicle Code (CVC) requires that certain studies be
conducted and procedures be followed in order to allow the use of radar
for speed enforcement . We have completed such studies and are
recommending that the City Council enact an ordinance providing for a 25
mile per hour limit on the residential portions of Amador Valley
Boulevard.
Sections 22357 , 22348 and 22358 of CVC allows cities to establish
various speed limits on the basis of an engineering and traffic survey.
Section 627 defines the engineering and traffic survey to include a
study of prevailing speeds, accident records and conditions not readily
apparent to the driver. Section 40802 provides that engineering and
traffic surveys and resulting speed limits are valid for only a five
year period when radar enforcement is utilized.
In preparing these recommendations , TJKM has followed all applicable
provisions and requirements of the California Vehicle Code and the
California Department of Transportation and following the enacting of an
ordinance based on these recommendations , the City of Dublin may enforce
speed limits on portions of Amador Valley Boulevard with the use of
radar.
Prevailing Speeds : Updated radar speed surveys were conducted in
mid-morning and mid-afternoon periods on Amador Valley Boulevard on
May 8, 1984. Summaries of the radar surveys for the four locations
sampled are enclosed. The results are further summarized as follows:
Average
Location Direction Vehicles Speed 85th%
East of York Westbound 54 29 33
East of York Eastbound 72 31 37
East of Ann Arbor Westbound 59 31 35
East of Ann Arbor Eastbound 59 30 36
A total of 244 vehicles was observed during the survey periods. Only 11
vehicles were observed at speeds of 25 mph or lower. However, only 37
vehicles were-travelling faster than 35 miles per hour. (At other times
of the day, however , a greater population of the vehicles may be
exceeding 35 mph . ) The radar observer noted that a larger portion of
the vehicles were driven by teenaged motorists.
Richard Ambrose -2- May 10, 1984
Accident Records : Accident summaries for the past two and a half years
were reviewed. there does not appear to be a serious accident problem
along the street although the presence of relatively high volumes of
"through" traffic in a residential district with numerous driveways and
parked vehicles indicates a potential accident problem if high speed
traffic is not abated.
Conditions Not Readily Apparent to the Driver : This is the primary
factor which indicates the need for a 25 mph zone. Due to the numerous
driveways , parked vehicles , intersections and crosswalks , prevailing
travel speeds should be kept to a minimum. Since the roadway is used as
an arterial and serves through traffic, these conditions are not readily
apparent to many motorists .
Recommendations : It is recommended that the City Council enact an
ordinance limiting the speed of travel to 25 miles per hour, in both
directions of travel , on Amador Valley Boulevard between 200 feet east
of Village Parkway and 200 feet east of Stagecoach Drive. Such limits
will be effective only after the position of appropriate speed limit
signs at these locations .
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Attachments : Four speed survey summaries
SPOT SPEED STUDY ANALYSIS
FOR THE CITY OF DUBLIN
LOCATION AMADOR VALLEY EAST OF YORK
DEVELOPMENT RESIDENTL.
DIRECTION WESTBOUND 50th PERCENTILE SPEED 29
DAY OF THE WEEK. TUESDAY 85th PERCENTILE SPEED 33
DATE 5-8-84 10 MPH RACE SPEED E6 TO 35
TIME OF THE DAY 2: : 15PM PERCENT IN PACE SPEED 92
POSTED SPEED LIMIT 25 RANGE OF SPEEDS 25 TO 37
VEHICLES OBSERVED 54 SKEWNESS INDEX 1. 33
CUMULATIVE SPEED CURVE
SPEED NUM- PERCNT. CUMUL.
(MPH) BER OF TOT. PRCNT. 100'/• ••••••••••••••-�
25 1 1. 85 1. 85 ► I I I • t t I i
26 7 12. 96 14. 81 I I I I • I I I I
27 7 12. 96 27. 78 I I I { •• I 1 1 I
28 6 1 1. 1 1 38. 89 90% 1 --1 I I -•=t I I I
29 9 16. 67 55. 56 1 1 t I • f { I I
30 6 1 1. 1 1 G6. 67 I I i i •• I I I I
31 3 5. 56 72. 22 I 1 I I • I 1 I I
32 4 7. 41 79. 63 80% 1 1 1 I • I I I I
33 3 5. 56 85. 19 1 1 I I• I t I I
34 4 7. 41 92. 59 1 1 1 10 1 I 1 t
35 1 1. 85 94. 44 1 1 1 10 1 I I 1
36 2 3. 70 98. 15 70% i I f-•• I I I !
37 1 1. 85 100. 00 1 I I • I ! i {
38 0 0. 00 100. 00 1 I 1 • i I I I
39 0 0. 00 100. 00 1 I I • { I i i
40 0 0. 00 100. 00 60% { I I 1 I I r
41 0 0. 00 100. 00 I I I • J I I
42 0 0. 00 100. 00 I I I •• I I I t
43 0 0. 00 100. 00 1 I I •I I I I I
44 0 0. 00 100. 00 50% t I I-•I I I
45 0 0. 00 100. 00 1 I I •{ I i I I
46 0 0. 00 100. 00 1 I I •i I I I f
47 0 0. 00 100. 00 1 I I •I J 1 I I
48 0 0. 00 100. 00 40% { i I -• I I 1 I I
49 0 0. 00 100. 00 1 I I •t
50 0 0. 00 100. 00 1 I I •1
51 0 0. 00 100. 00 I I I •1 J I 1 1
52 0 0. 00 100. 00 30
53 0 0. 00 100. 00 I I I ••I I I I I
54 0 0. 00 100. 00 1 1 I • I I I I I
55 0 0. 00 100. 00 1 I I • I I I I f
56 0 0. 00 100. 00 20% I I I -•-I 1 I I i
57 0 0. 00 100. 00 1 I I • I I I I
58 0 0. 00 100. 00 1 I t • I I ! ! I
59 0 0. 00 100. 00 1 I I • I I I I I
60 0 0. 00 100. 00 10% I I I -•-I I I I I
61 0 0. 00 100. 00 1 I I • I 1 1 t
62 0 0. 00 100. 00 1 I I • I I I I I
63 0 0. 00 100. 00 I I I • I I I I . I
64 0 0. 00 100. 00 0X �•••••••••••• A
0 10 20 30 40 50 60 70
SPEED (MPH)
SPOT SPEED STUDY ANALYSIS
FOR THE CITY OF DUBLIN
LOCATION AMADOR VALLEY EAST OF YORK
DEVELOPMENT RESIDENTL.
DIRECTION EASTBOUND 50th PERCENTILE SPEED 31
DAY OF THE WEEK. TUESDAY 85th PERCENTILE SPED 37
DATE 5-8-84 10 MPH PACE SPEED E7 TO 36
TIME OF THE DAY : :23-3: 15PM PERCENT IN FACE. SPEED 81
POSTED SPEED LIMIT 25 RANGE OF SPEEDS 25 TO 41
VEHICLES OBSERVED 7E SKEWNESS INDEX 1. 27
CUMULATIVE SPEED CURVE
SPEED NUM- PERCNT. CUMUL.
(MPH) BER OF TOT. PRCNT. 100'/. -�
25 2 2. 78 2. 78
E6 0 0. 00 2. 78 I I I I •• i I I
27 4 5. 56 8. 33 1 1 i I • I I I I.
E8 6 8. 33 16. 67 90%
29 9 12. 50 29. 17 1 1 I I 001 1 I I
30 6 8. 33 37. 50 1 1 I I • I 1 I {
31 14 19. 44 56. 94 1 1 I I • I I i f
3E 3 4. 17 61. 1 1 80% 1
1 1. 39 62. 50 1 1 1 1 a• I I I I
34 8 11. 11 73. 61 1 1 1 1 a I I I I
35 3 4. 17 77. 78 1 1 1 1 • I I 1 f
36 5 6. 94 84. 72 70%
37 3 4. 17 88. 89 1 1 1 1 4 I t I I
38 5 6. 94 95. 83 1 1 1 • I I I {
39 1 1. 39 97. 22 I I i I �P• I I I {
40 1 1. 39 98. 61 605 I I i 1 • I I I I
41 1 1. 39 100. 00
42 0 0. 00 100. 00 I I I a* I 1 I 1
43 . 0 0. 00 100. 00 I I I • I 1 I I
44 0' 0. 00 100. 00 50% I i I -�► I I J I
45 0 0. 00 100. 00 I I I a I I 1 t
46 0 0. 00 100. 00 I i I • I f t I
47 0 0. 00 100. 00 I I I • I 1 I I
48 0 0. 00 100. 00 40% 1
49 0 0. 00 100. 00 1 I I • I 1 i I
50 0 0. 00 100. 00 1 I ! • I I I i
51 0 0. 00 100. 00 1 I I • I I I I
52 0 0. 00 100. 00 30%
53 0 0. 00 100. 00 I I 1 •• I ! I 1
54 0 0. 00 100. 00 I I I • I I I I I
55 0 0. 00 100. 00 I I I • I I 9 I
56 0 0. 00 100. 00 20% 1 I I -• I I 6 I I
57 0 0. 00 100. 00 1
58 0 0. 00 100. 00
59 0 0. 00 100. 00
60 0 0. 00 100. 00 10% I
61 0 0. 00 100. 00 1 I I •• I I f 1 I
62 0 0. 00 100. 00 1 1 I • I I I I I
63 0 0. 00 100. 00 1 I f • I 1 1 i I
64 0 0. 00 100. 00 0% L•••••••••••••
0 10 E0 30 40 5Z Eto 727
SPEED (MPH)
SPOT SPEED STUDY ANALYSIS
FOR THE CITY OF DUBLIN
LOCATION AMADOR VALLEY EAST OF ANN ARBOR
DEVELOPMENT RESIDENTL.
DIRECTION WESTBOUND 50th PERCENTILE SPEED 31
DAY OF THE WEEK TUESDAY 85th PERCENTILE SPEED 35
DATE 5-8-84 10 MPH PACE SPEED 27 TO 36
TIME OF THE DAY 10: 45-11 : 23AM PERCENT IN PACE SPEED 81
POSTED SPEED LIMIT 25 RANGE OF SPEEDS 24 TO 42
VEHICLES OBSERVED 59 SKEWNESS INDEX 1. 27
CUMULATIVE SPEED CURVE
SPEED NUM- PERCNT, CUMUL.
(MPH) BER OF TOT. PRCNT. 100'/- •ap•a•p•pp•--�
24 1 1. 69 1. 69 I I I I • ► i I
25 2 3. 39 5. 08 f 1 I i a•• I I I
26 1 1. 69 6. 78 1 f I I a l I I I
27 5 8. 47 15. 25 90% I I I
28 3 5. 08 20. 34 1 1 1 1 •• I I I I
29 5 8. 47 28. 81 1 t 1 I • t I I I
30 9 15. 25 44. 07 1 1 1 I • I 1 I I
31 8 13. 56 57. 63 80'/. I I I I -•--i I I I
32 4 6. 78 64. 41 I I I 1 •• I I I t
33 4 6. 78 71. 19 I I I 1 •" 1 I I 1
34 4 15. 78 77. 97 I I I 10
35 5 8. 47 86. 44 70% I I I I • f I I I
36 1 1. 69 88. 14 1 I I I• 1 I I I
37 2 3. 39 91. 53 I I I • I I I I
38 3 5. 08 96. 61 I I I a• I t I I
39 0 0. 00 96. 61 60% 1
40 0 0. 00 96. 61 1 I I a I I I I
41 1 1. 69 98. 31 1 I I • I i I I
42 1 1. 69 100. 00 1 I I • { I I I
43 0 0. 00 100. 00 50%
44 0 0. 00 100. 00 1 I I • I I I !
45 0 0. 00 100. 00 1
46 0 0. 00 100. 00 1 I I •• I I I
47 0 0. 00 100. 00 40%
48 0 0. 00 100. 00 1 I I •I t I I I
49 0 0. 00 100. 00 t 1 t • I I I I I
50 0 0. 00 100. 00 1 I l •i 1 I I I
51 0 0. 00 100. 00 30'/.
52 0 0. 00 100. 00 I I I •I I I I i
53 0 0. 00 100. 00 I 1 I • I 1 I I I
54 0 0. 00 100. 00 I I I •I I I I 1
55 0 0. 00 100. 00 20% I I I -•• I 1 I i i
56 0 0. 00 100. 00 I f I • ! I I I i
57 0 0. 00 100. 00 I I I o f I I 1 !
58 0 0. 00 100. 00 I i i • I 1 t
59 0 0. 00 100. 00 10% 1 I I -•-i I i f !
60 0 0. 00 100. 00 i I I • { I I I I
61 0 0. 00 100. 00 1 I I •• I I 1 I I
62 0 0. 00 100. 00 I I I • I t t 1 I
63 0 0. 00 100. 00 0% �a•••a•••••••
0. 10 20 30 40 5ti E_
SPEED (MPH)
SPOT SPEED S'fUDY ANALYSIS
F013 THE CITY OF DUBLIN
LOCATION AMADOR VALLEY EAST OF ANN ARDOR
DEVELOPMENT RESIDENTL.
DIRECTION EASTDOUND 50th PERCENTILE,- SPEED :o
DAY OF THE WEEK TUESDAY 85th PERCENTILE SPEED 36
DATE 5-8-84 10 MPH PACE SPEED 28 TO 37
TIME OF THE DAY 10: 45-11 : 2:3AM PERCENT IN RACE STEED 76
POSTED SPEED LIMIT 25 RANGE OF SPEEDS 2'0 TO 40
VEHICLES OBSERVED 59 SKEWNESS INDEX 1. 17
CUMULATIVE SPEED CURVE
SPEED NUM- PERCNT. CUMUL.
(MPH) DER OF TOT. PRCNT. 100%
20 2 .s. 39 3. 39 t I I 1 •••a••••$••I i
1 0 0. 00 3. 37 9 1 1 1 1 001 1 I t
0 0. 00 3. 39 1 1 1 1 • I I I t
23 1 1. 69 5. 08 90% I I -1 -1
24 1 1. 69 6. 78 I I I I • i i I i
25 1 1. 69 8. 47 I I I i �• I i I I
26 2 3. 39 11. 86 I l I I • i I I f
37 5. 08 16. 95 80% I I I I-•-I I I I
28 6 10. 17 27. 12 I I I I •a I l I I
a9 5 8. 47 35. 59 I I I 10 1 I I I
30 12 c0. 37 4 5J. 93 I I I 1 • 1 I 1 I
31 5 8. 47 64. 41 70% I f I f • I 1 f 1
�9 67. 80 1 1 1 a• I I t I
33 3 5. 08 72. 88
34 J . . 08 77. 97 I i 1 • I I I I
35 71 :,. 08 83. 05 60% i I 1
36 2 3. 39 86. 44 1 1 I • I I I 1
37 4 6. 78 93. 22 f I I •• I I I I
�8 2 39 96. 61 1 I I • I I I I I
39 0 0. 00 96. 61 50% I -1.-1
40 2 3. 39 100. 00 1 I I • I l I I t
41 0 0. 00 100. 00 1 I ! •i I I I I
42 0 0. 00 100. 00 1 I I a l I t I 1
43 0 0. 00 100. 00 40%. 1 { I --• I I I 3 I
44 0 0. 00 100. 00 I I I •t I I I t
45 0 0. 00 100. 00 I
46 0 0. 00 100. 00 1 1 I a l I I I 1
47 0 0. 00 100. 00
48 0 0. 00 100. 00
49 0 0. 00 100. 00 I I i •• I I I I 1
50 0 0. 00 100. 00 1 I I • f I I I {
51 0 0. 00 100. 00 20% 1 -1 -1
--•-I I I f
52 0 0. 00 100. 00 1 I I • i I f I I
53 0 0. 00 100. 00 1
54 0 0. 00 100. 00 1 I I a I f I d
55 0 0. 00 100. 00 10% i 1 Ana-1 I I d
56 0 0. 00 100. 00 I i I • I I i i
57 0 0. 00 100. 00 I I I •• I I i I 1
58 0 0. 00 100. 00 1 I •• t I I 1 1
59 0 0. 00 100. 00 0;G '-�Ira•a••a•••
0 10 20 30 40 50 6'0 ?0.
SPEED (MPH)
ORDINANCE NO.
AN ORDINANCE OF THE CITY OF DUBLIN
ESTABLISHING TRAFFIC REGULATIONS
The City Council of the City of Dublin does ordain as
follows :
Section 1 . TWENTY-FIVE ( 25 ) MILES PER HOUR (mph) .
Article 18 , of the Alameda County Ordinance Code
Title 6 , previously adopted by the City of Dublin, relating to
the. establishment of speed limits , is amended by the addition of
section 6-626 . 6 to read :
6-626 . 6 Amador Valley Boulevard between 200 feet east
of Village Parkway and 200 feet east of
Stagecoach Drive
Section 2 . IMMEDIATE EFFECT
This ordinance shall take effect immediately upon
its enactment because the adoption and immediate effect there of
is necessary in order to protect vehicular and pedestrian
safety.
Section 3 . POSTING OF ORDINANCE
The City Clerk of the City of Dublin shall cause
this ordinance to be posted in at least three ( 3 ) public places
in the City of Dublin in accordance with Section 36933 of the
Government Code of the State of California.
PASSED AND ADOPTED by the City Council of the City of
Dublin on this day of 1984 ,
AYES :
NOES :
ABSENT :
MAYOR
Attest :
By
CITY CLERK