HomeMy WebLinkAbout6.4 SpeedLmtDB WstOfSlvrgtCITY OF DUBLIN
AGENDA STATEMENT
City Council Meeting Date: January 14, 1991
SUBJECT:
Public Hearing: Speed Limit on Dublin Boulevard
(Report by Public Works Director Lee Thompson)
EXHIBITS ATTACHED:
1) Draft Ordinance
2) Report from TJKM
3) Location Map
4) "Speed Trap" section of the California Vehicle
Code (CVC)
RECOMMENDATION: ~~1)2)
3)
4)
5)
Open public hearing.
Receive Staff presentation and public testimony.
Question Staff and the public.
Close public hearing and deliberate.
Waive reading and INTRODUCE ordinance establishing
speed limits on Dub]in Boulevard.
FINANCIAL STATEMENT:
Approximately $500 to post new signs and install
pavement markings. Sufficient funds are budgeted in
the Street Maintenance Operating Budget to cover this
cost.
DESCRIPTION: The City recently approved annexation of the portion
of Dublin Boulevard west of Silvergate Drive. Alameda County has not
established a speed limit on this portion of Dublin Boulevard; hence, the
existing speed limit is the State's "maximum speed" or 55 mph. The City's
Traffic Engineer, TJKM, has conducted a speed survey on this portion of Dublin
Boulevard for two reasons: (1) the intention to establish a lower legal speed
limit, and (2) so that radar can be used for enforcement.
At the same time, TJKM also conducted a speed survey on Dub]in Boulevard
between Donlon Way and Si]vergate Drive. The adopted speed limit on the
Donlon to Silvergate portion of Dub]in Boulevard is 35 mph; however,
conflicting signs and pavement markings had been installed which indicated
both 25 mph and 35 mph for this same section of roadway. In addition, concern
was expressed by both the City Council and some of the residents of Si]vergate
Drive near the Dub]in Boulevard intersection that vehicles traveling at 35 mph
or above on Dublin Boulevard did not slow down for the sweeping curve onto
Silvergate Drive, causing a potential hazard for residents trying to back out
of driveways. The legal speed limit on Silvergate Drive itself is 25 mph.
The Dub] in Boulevard speed survey results were as follows:
85th percentile
50th percentile
range
West of Don]on
41 mph 36 mph 21 - 49 mph
East of Silvergate: E/B 42 mph 36 mph
W/B 44 mph 38 mph
28 - 48 mph
27 - 48 mph
West of Si]vergate: E/B 42 mph 36 mph
W/B 40 mph 35 mph
28 - 48 mph
28 - 45 mph
The 85th percentile speed is the highest speed at which 85% of the traffic
traveled during the period surveyed; in other words, west of Don]on Way, 85%
of the vehicles were traveling at 41 mph or be]ow. The 50th percentile speed
is the highest speed at which 50% of the traffic traveled. A traffic court
judge will typically use the 85th percentile speed as a safe or allowable
speed when reviewing a contested citation un]ess documentation has been
ITEM NO.'~
COPIES TO: TJKM
provided which justifies a lower safe speed. For this reason, a posted speed
limit which is considerably be]ow the 85th percentile speed is generally not
enforceable and may be deemed a "speed trap" (see Exhibit 4).
TJKM recommends retaining the present 35 mph speed limit for Dub]in Boulevard
westerly through the Silvergate Drive intersection. While both the 85th and
50th percentil.e speeds are above 35 mph, the 35 mph speed is appropriate for a
street with intersecting commercial/retail driveways and residential, streets.
The westerly limit for the 35 mph speed is proposed to be defined as
"Si]vergate Drive," as the present 35 mph speed extends to the old "City
Limit," which is approximately 400 feet west of Silvergate Drive.
West of Silvergate Drive, the prevailing speeds are about the same as those
between Don]on and Si].vergate; however, there are no intersecting driveways at
this time other than the road to Valley Christian Center and the driveway of
the single house at the end of the street. It is therefore recommended that
the speed limit for this portion of Dub]in Boulevard be set at 40 mph.
The City Council approved annexation of this portion of Dublin Boulevard in
August of 1990, and LAFCO approved the annexation in July of 1990 subject to
minor corrections being made by the applicant. Staff estimates that the
annexation wi].] become final in approximately two months. The processing time
for an ordinance is also approximately two months. It is recommended that the
City Council. take action on the ordinance at this time so that the ordinance
would become effective on the date that the annexation becomes official or
after the second reading and 30-day posting period for the ordinance have
passed, whichever is later.
Signing that is proposed to be instal.led would include the 25 mph curve
warning sign on the sweeping curve from Dublin Boulevard onto Silvergate Drive
(as discussed at a previous meeting) and standard 40 mph speed limit signs
west of Silvergate Drive.
Staff recommends that the City Council conduct a public hearing, deliberate,
waive the reading, and INTRODUCE the ordinance establishing speed limits on
Dub]in Boulevard west of San Ramon Road.
-2-
ORDINANCE NO. -91
AN ORDINANCE OF THE CITY OF DUBLIN
ESTABLISHING SPEED LIMITS ON DUBLIN BOULEVARD
The City Council of the City of Dublin does ORDAIN as follows:
Section 1.
In accordance with the provisions of Section 6.04.340 of the City of
Dublin Municipal Code, speed limits shall be established as follows:
(a) Dublin Boulevard, from Donlon Way through the Silvergate Drive
intersection: 35 miles per hour.
(b) Dublin Boulevard, from the westerly side of the Silvergate Drive
intersection to the westerly City Limit: 40 miles per hour.
Section 2.
The provisions of Section 1 shall be added to Chapter 14 of the City of
Dublin Traffic Code.
Section 3. Effective Date and Posting of Ordinance
Section l(a) shall become effective 30 days from the date of adoption of
this Ordinance. Section l(b) shall become effective 30 days from the date of
adoption of this Ordinance or upon recordation of Annexation No. 8, whichever
is later. 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, APPROVED AND ADOPTED by the City Council of the City of Dublin
on this day of , 1991 by the following vote:
AYES:
NOES:
ABSENT:
ATTEST:
City Clerk
Mayor
gkmMEMORANDUM
January 8, 1991
TO: Lee Thompson
FROM: David Othling
Chris Kinzel
SUBJECT: Dublin Boulevard Traffic Control Improvements
This memo documents an analysis and observations supporting recommended traffic
control improvements along Dublin Boulevard between Donlon Way and the new
West City Limit in the City of Dublin. This study addresses concerns discussed at
the Traffic Safety Committee meeting on October 30th regarding whether the
existing speed control signing and striping is appropriate and adequate.
This study is based on field observations and radar speed surveys conducted at a
total of three locations on Monday, December 11, 1989 and Wednesday, November 7,
1990.
Road Description
The westbound section of Dublin Boulevard consists of one through lane from
Donlon Way through Hansen Drive. The one through lane section continues
through Silvergate Drive via a left-turn lane and continues to the new West City
Limit. The westbound speed limit is posted as 35 miles per hour (mph) on Dublin
Boulevard from east of Donlon Way until west of Hansen Drive where a
25 pavement marking exists. The 25 marking requires an accompanying sign and
supporting ordinance to legally reduce the speed limit. Since the controlling
ordinance designates 35 mph as the legal speed limit, the prevailing 35 mph legal
limit continues from west of Hansen Drive through Silvergate Drive, where Dublin
Boulevard continues to the west from a free flow left-turn lane. West of Silvergate
Drive, Dublin Boulevard westbound is unposted until the road curves to the right
and a yellow 40 mph curve warning sign is posted. This only indicates an advisory
safe speed and not a legal limit, so the prevailing 35 mph legal limit continues from
the curve to the old West City Limit, a distance of approximately 400 feet. The legal
speed limit between the old and new West City Limit is 55 mph since there is no
controlling ordinance.
4637 Chabot Drive,Suite 214, Pleasanton,California 9i
PLEASANTON•SACRAMENTO•FRESNO.COI y
OCIDA/ 4--,A-1 k t, A
Lee Thompson -2- January 8, 1991
The eastbound section of Dublin Boulevard consists of one through lane from the
new West City Limit through Silvergate Drive via a right-turn lane and widens to a
two through lane section east of Hansen Drive. This two through lane section
continues through Donlon Way. The eastbound speed limit is unposted at the new
West City Limit until the road curves to the left where a yellow 40 mph curve
warning sign is posted. This does not establish a legal speed limit, so Dublin
Boulevard effectively does not have a posted legal speed limit until Silvergate Drive,
where Dublin Boulevard continues to the east from a STOP sign controlled
right-turn lane. East of Silvergate Drive, Dublin Boulevard eastbound is posted at
35 mph.
Observations
1. The 25 mph pavement marking on westbound Dublin Boulevard, west of
Hansen Drive is not accompanied by a speed limit sign and, therefore,
does not legally establish a 25 mph speed limit. It is also not appropriate
as Dublin Boulevard has been designated as a 35 mph road in the
vicinity.
2. The speed limit sign indicating 25 mph on Silvergate Drive is placed on
the westbound Dublin Boulevard to Silvergate Drive right curve curb
radius where sight distance is limited. This may not provide sufficient
distance for vehicles to stop or effectively reduce their speeds prior to
hidden residential driveways on Silvergate Drive.
3. The yellow 40 mph curve warning signs on Dublin Boulevard west of
Silvergate Drive are not appropriate with respect to the prevailing legal
speed of 35 mph in the vicinity and the absence of speed limit signs
between the new West City Limit and Silvergate Drive. Curve warning
signs are advisory only and need to be used in conjunction with standard
speed limit signs to indicate speed limits at or less than the prevailing
speed limit.
Speed Survey
The westbound Dublin Boulevard radar speed survey between Donlon Way and
Silvergate Drive indicated 85th percentile speeds of 41 and 44 mph approaching
Hansen Drive and Silvergate Drive. The speeds ranged from 21 to 49 mph and from
27 to 48 mph at each respective location. The westbound Dublin Boulevard radar
speed survey between Silvergate Drive and the new West City Limit indicated an
85th percentile speed of 40 mph with speeds ranging from 28 to 45 mph.
The eastbound Dublin Boulevard radar speed survey between the new West City
Limit and Silvergate Drive indicated an 85th percentile speed of 43 mph
approaching Silvergate Drive with speeds ranging from 29 to 44 mph. The
eastbound Dublin Boulevard radar speed survey between Silvergate Drive and
Donlon Way indicated 85th percentile speeds of 42 and 41 mph approaching
Hansen Drive and Donlon Way. The speeds ranged from 28 to 48 mph and from
21 to 49 mph at each respective location.
SPOT SPEED STUDY ANALYSIS
FO=' THE CITY OF DUBLIN
LOCATION DUBLIN BLVD W/0 DONLON WAY DEVELOPMENT COMM
DIRECTION BOTH 50th PERCENTILE SPEED 36
DAY OF THE WEEK MONDAY 85th PERCENTILE SPEED 41
DATE 12/11/89 10 MPH FACE SPEED 30 TO 39
TIME OF THE DAY 1 : 35-2: 10 PM PERCENT IN PACE SPEED 64
POSTED SPEED LIMIT 35 F:ANi3E OF SPEEDS 21 TO 49
VEHICLES OBSERVED 121 SFEWNESS INDEX 0. 93
CUMULATIVE SPEED CURVE
SPEED NUM- PERONT. C:UMUL.
( MPH ) BEE: OF TOT. F'RCNT. 1007. +21 2 1 . 65 1 . 65 * : :
22 0 1 0. ()0 1 . 65 * 1 : :
iJ - 1 . 65 J. .i 1 1 1 I I 1 I I
24 2' 1 65 4. 96 90% 1 1 1 ---- ' ---- ' -- ' ---- ' ---- :
5 1 .65 6. 61 : : : : : * : : :
26 0 0. 00 6. 61 : * : :
27 0 o. 0(:1 6. 61 : * :
2. 48 9. 09 80% 1 / 1 1 --- ' ---- ' ---- '
C 1 I 1 1 1 1 1
�'� 7 J. 7'J 14. SO 1 1 1 1 * I I 1 1
"1 JJ (fin 1 1 1 1 1 1 1 1
30 6 4. 96 1' . 83 1 1 1 1 * 1 1 1 1
31 4 3. 31 23. 14 : : : * 1 : : :
3:' S 4. 13 27. 27 i7 70% I ---- 1 ---- 1 ---- 1 ---* 1 1 I I
._,_ 6 4. '3I- .Ji, LJ 1 I 1 1 * I 1 1 1
�"1 ` ."1 1 I 1 1 1 1 I 1
,J 4 J 4. 13 3 6. J 6 1 1 1 1 * 1 1 1
35 14 11 . 57 4/ . 93 : : : : * 1 : : ■
36 8 6. 61 54. 55 6O% : ---- : ---- : ---- : --*- : ---- : ---- : ---- :
37 9 7. 44 61 . 98 : : : : * : : : :
38 7 5. 79 67. 77 : : 1 : * : : : :
39 14 11 . 57 79. 34 : : : : * : : : :
40 6 4. 96 84. 31) 507. : ---- : ---- : ---- : --*- : ---- : ---- : ---- ;
41 4 3. 31 87. 60 1 : : : * : : : :
42 3 2. 48 90. 08 : : : : * : : : :
43 6 4. 96 95. 04 : : : : * : : : :
44 1 0. 83 95. 87 407.. : ---- : ---- : ----: -*-- : ---- : ---- : ---- :
45 2 1 . 65 97. 5: : : : 1 I I 1 1
1 1
46 1 0. 83 90. 35 : : : : * : : : :
47 0 0. 00 98. 35 : : : : * : : : :
48 1 0. 33 99. 17 30 : ---- : ---- : ---- : *--- : ---- : ---- : ---- :
5i 0 (_), (10 100, 00 : : : : * : : : :
52 0 0. 00 100. 00' 20;: : ---- : : ----*---- : ---- : ---- : ---- :
56 0 0. 00 100. 00 107. :---- : ---- : ---* : ---- : ---- : ---- : ---- :
57 0 i), c:)0 10(:>. 00 : : : *x : : : : 1
58 0 0. 00 100. 00 : : : * : 1 : : :
5':,1 0 0. 00 100. 00 : : : ** : : : :
60 0 0. 00 1011. 00 (l% +********** •- +
61 0 (:). i)':) 100. 00 O 10 20 30 40 50 60 70
SPEED ( MPH )
SPOT SPEED STUDY ANALYSE
FOR THE CITY OF DUBLIN
LOCATION DUBLIN DL. W/O SILVER6ATE DEVELOPMENT RESIDENTIAL
DIRECTION EASTBOUND 50th PERCENTILE SPEED 38
DAY OF THE WEEK WEDNESDAY 85th PERCENTILE SPEED 43
DATE 11/07/90 10 MPH PACE SPEED 35 TO 44
TIME OF THE DAY 12: 35-12: 55 PM PERCENT IN PACE SPEED 82
POSTED SPEED LIMIT 40 RANGE OF SPEEDS 29 TO 44
VEHICLES OBSERVED 34 SKEWNESS INDEX 1 . 00
CUMULATIVE SPEED CURVE
SPEED NUM- PERCNT. CUMUL.
( MPH) BER OF TOT. PRCNT. 100% +---- - ************+
29 1 2. 94 2.94 | : | | | * | | |
30 1 2. 94 5. 88 | | | | | * / | (
31 0 0. 00 5. 88 | | | | | * | | |
32 1 2. 94 8. 82 90% | ---- | ---- | ---- | ---- | -*-- | ---- | ---- |
33 2 5. 88 14. 71 � | | | | * | | |
34 1 2. 94 17. 65 | | | | | * | | |
35 7 20. 59 38. 24 | | | | | * | | |
36 1 2. 94 41 . 18 80% | ---- | ---- | ---- | ---- | *--- | ---- | ---- |
37 2 5. 88 47. 06 | | | | | * | | |
38 5 14. 71 61 . 76 | | | | * | | |
39 0 0. 00 61 . 76 | ' | | * | | |
40 5 14. 71 76. 47 70% | ---- | - -- | ---- | ----*---- | ---- | ---- |
41 0 0.00 76. 47 | | ' | * | | |
42 2 5. 88 82. 35 | | | | * | | |
43 3 8. 82 91 . 18 | | | | * | | | '
44 3 8. 32 100. 00 60% | ---- � ---- | ---- | ---* � ---- | ---- | ---- |
45 0 0. 00 100. 00 | | | | * | | | |
46 i 0. 00 ; 00. 00 / | | | * | | | |
47 0 0. 00 100. 00 | | | * | | | |
48 0 0. 00 100. 00 50% | ---- | - | ---* | ---- | ---- | ---- |
49 0 0. 00 100. 00 | | | | * | � | |
50 0 0. 00 100. 00 � | | : * | | | |
51 0 0. 00 100. 00 | | | | * | | | |
52 0 0. 00 100. 00 40% | ---- | ---- | ---- | --*- | ---- | ---- | ---- |
53 0 0. 00 100. 00 | | | | * | | | |
54 0 0. 00 100. 00 | | | ( * | | | |
55 0 0. 00 100. 00 | | | 1 * | | | |
56 0 0. 00 100. 00 30% | ---- | ---- | ---- | -*-- | ---- | ---- | ---- |
57 0 0. 00 100. 00 | | | | * | | | |
58 0 0. 00 100. 00 | | | | * | | | |
59 0 0. 00 100. 00 | | | | * | | | |
60 0 0. 00 100. 00 20% | ---- | ---- | ----| -*-- | ---- | ---- | ---- |
61 0 0. 00 100. 00 | | | | * | | | |
62 0 0. 00 100. 00 | | | | * | | |
. ,
63 0 0. 00 1.-.0. 00 | ' | | * | | | |
64 0 0. 00 100. 00 10% | ---- | ---- | ---- | *--- | ---- | ---- | ---- |
65 0 0.00 160. 00 � | | : * | | | |
66 0 0. 00 100. 00 ( � | | * | | | |
67 0 0. 00 100. 00 | | | * | | | |
68 0 0. 00 100. 00 0% +* ***********-------- -------+
69 0 0. 00 100. 00 0 10 20 30 40 50 60 70
SPEED `MPH)
SPOT SPEED STUDY ANALYSI
FOR THE CITY OF DUBLIN
LOCATION DUBLIN BL. E/O SILVERGATE DEVELOPMENT RESIDENTIAL
DIRECTION EASTBOUND 50th PERCENTILE SPEED 36
DAY OF THE WEEK WEDNESDAY 85th PERCENTILE SPEED 42
DATE 11/07/90 10 MPH PACE SPEED 29 TO 38
TIME OF THE DAY 12: 05-12: 30 PM PERCENT IN PACE SPEED 64
POSTED SPEED LIMIT 25 RANGE OF SPEEDS 28 TO 48
VEHICLES OBSERVED 50 SKEWNESS INDE.: 1 . 07
CUMULATIVE SPEED CURVE
SPEED NUM- PERCNT. CUMUL.
(MPH) BER OF TOT. PRCNT. 100% +------- ----------***********+
28 2 4. 00 4. 00 | | | | | * | | |
29 3 6. 00 10. 00 | | | | | * | | �
30 3 6. 00 16. 00 | | | | | * | | |
31 : 6. 00 22. 00 90% | ---- | ---- | ---- | ---- | *--- | ---- | ---- |
32 1 2. 00 24. 00 | } | | | * | | |
33 3 6. 00 30. 00 | | | | * | | |
34 2 4.00 34. 00 | | | | * | | |
35 3 6. 00 40. 00 80% | ---- | ---- | ---- | ----*---- | ---- | ---- |
36 5 10. 00 50. 00 | | | | * | | |
37 2 4. 00 54. 00 | | | | � | | | |
38 7 14. 00 68. 00 | | | | * | | | |
39 2 4. 00 72. 00 70% | ---- | ---- | ---- | ---* | ---- | ---- | ---- |
40 3 6. 00 78. 00 | | | | * | | | |
41 2 4. 00 32. 00 | | | | » | | | |
42 3 6. 00 88. 00 | | | | * | | | | '
43 0 0. 00 U8. 00 60% | ---- | ---- | ---- | --*- | ---- | ---- | ---- |
44 3 6.00 94. 00 | | | | * | | | |
45 0 0. )0 1'4 . U(..) | | | ■| * | | | |
46 2 4. 00 98. 00 | | | | * | | � |
47 0 0. 00 98. 00 50% | ---- | ---- | ---- | --*- | ---- | ---- | ---- |
48 l 2. 00 100. 00 | | | | '4- | | | |
49 0 0. 00 100. 00 | | | | A- | | | |
50 0 0.00 100. 00 | | | | * | | | |
51 o 0.00 100. 00 40% | ---- | ---- | ---- | -*-- | ---- | ---- | ---- |
52 0 0. 00 100. 00 | | | | * | | | |
53 0 0. 00 100. 00 | | | : * | | | |
54 0 0. 00 100. 00 | | | | * | | | |
55 ".0. 00 100. 00 30% | ---- | ---- | ---- | *--- | ---- | ---- | ---- |
56 0 0. 00 100. 00 | | | | * | | | |
57 0 0. 00 l00. �0 | | | | * | | | (
58 0 0. 00 100. 00 | | | * | | | |
59 0 0. 00 100. 00 20% | ---- | ---- | ----*---- | ---- | ---- | ---- |
60 0 0. 00 100. 00 | | , * | | | |
61 0 0. 00 100. 00 | | | * | | | |
62 0 0. 00 100. 00 | | | * | | | | | '
63 0 0. 00 100. 00 10% | ---- | ---- | + | ---- | ---- | ---- | ---- |
64 0 0. 00 100. 00 | | | * | | | | |
65 0 0. 00 100. 00 | | | * | | | | |
66 0 0.00 100. 00 | | | * | | | | |
67 0 0. 00 100. 00 0% +*************----- -----+
68 0 0. 00 100.00 0 10 20 30 40 50 60 70
SPEED (MPH)
SPOT SPEED STUDY ANALYST
FOR THE CITY OF DUBLIN
•
LOCATION DUBLIN BL. E/O SILVERGATE DEVELOPMENT RESIDENTIAL
DIRECTION WESTBOUND 50th PERCENTILE SPEED 38
DAY OF THE WEEK WEDNESDAY 85th PERCENTILE SPEED 44
DATE 11/07/90 10 MPH PACE SPEED 32 TO 41
TIME OF THE DAY 12: 05-12: 30 PM PERCENT IN PACE SPEED 64
POSTED SPEED LIMIT 25 RANGE OF SPEEDS 27 TO 48
VEHICLES OBSERVED 50 SKEWNESS INDEX 1 . 00
CUMULATIVE SPEED CURVE
SPEED NUM- PERCNT. CUMUL.
(MPH) BER OF TOT. PRCNT. 100% +---- -------------* ********+
27 1 2.00 2. 00 | | | | | * | | |
28 0 0. 00 2. 00 | | | | | * | | :
29 2 4. 00 6.00 | | | | | * | | |
30 4 8. 00 14. 00 90% | ---- | ---- | ---- | ---- | -*-- | ---- | ---- |
31 1 2. 00 16. 00 | | | | | * | | |
32 2 4. 00 20. 00 | | | | | * | | |
33 2 4. 00 24. 00 | | | | | � | | |
34 2 4. 00 28. 00 80% | ---- | ---- | ---- | ---- | *--- | ---- | ---- |
35 3 6. 00 34. 00 | | | | * | | |
36 4 8. 00 42. 00 | | | | * | | |
37 3 6. 00 48. 00 | | | | * | | |
38 5 10. 00 53. 00 70% | ---- | ---- | ---- | ----*---- | ---- | ---- |
39 3 6. 00 64. 00 | | | | * | | |
40 5 10. 00 74. 00 | | | | * | | |
41 3 6. 00 80. 00 | | | | * | | | | '
42 1 2. 00 82. 00 60% | ---- | ---- | ---- | ---*1 ---- | ---- | ---- |
43 1 2. 00 84. 00 | | | | * | | | |
44 1 2. 00 26. 00 | | | | * | | | |
45 3 3. 00 92. 00 | | | | *| | | |
46 1 2. 00 ',7:4. 00 50% | ---- | ---- | ---- | ---* | ---- | ---- | ---- |
47 2 4. 00 98. 00 | | : | *| | | |
48 1 2. 00 100. 00 | | | | * | | | |
49 0 0. 00 100. 00 | | | | * | | | |
50 0 0. 00 100. 00 40% | ---- | ---- | ---- | --*- | ---- | ---- | ---- |
51 0 0. 00 100. 00 | | | | * | | | |
52 0 0. 00 100. 00 | | | | * | | | |
53 0 0. 00 100. 00 | | | | * | | | |
54 0 0. 00 100. 00 30% | ---- | ---- | ---- | -*-- | ---- | ---- | ---- |
55 0 0. 00 100. 00 I | | | * | | | |
56 0 0. 00 100. 00 | | | | * | | | |
57 0 0. 00 100. 00 | | | � * | | | |
58 0 0. 00 100. 00 20% | ---- | ---- | ---- | *--- | ---- | ---- | ---- |
59 0 0. 00 100. 00 | | | | * | | | |
60 0 0. 00 100. 00 | | | | * | | | |
61 0 0. 00 100. 00 | | | * | | | | '
62 0 0. 00 100. 00 10% | ---- | ---- | ----*---- | ---- | ---- | ---- |
63 0 0.00 100. 00 | | | * | | | |
64 0 0. 00 100. 00 | / | * | | | |
65 0 0. 00 100.00 • | | | * | | | | |
66 0 0. 00 100. 00 0% +************* --------------+
67 0 0. 00 100. 00 0 10 20 30 40 50 60 70
SPEED (MPH)
'
SPOT SPEED STUDY ANALYSI
FOR THE CITY OF DUBLIN
LO' TION DUBLIN EL. W/O SILVERGATE DEVELOPMENT RESIDENTIAL
DIRECTION WESTBOUND 50th PERCENTILE SPEED 35
DAY OF THE WEEK WEDNESDAY 35th PERCENTILE SPEED 40
DATE 11/07/90 10 MPH PACE SPEED 28 10 37
TIME OF THE DAY 12: 35-12: 55 PM PERCENT IN PACE SPEED 74
POSTED SPEED LIMIT 40 RANGE OF SPEEDS 28 TO 45
VEHICLES OBSERVED 35 SKEWNESS INDEX 1 . 25
CUMULATIVE SPEED CURVE
SPEED NUM- PERCNT. CUMUL.
(MPH) BER OF TOT. PRCNT. 100% +----------------------************+
28 2 5. 71 5. 71 | | | | / * | | |
29 1 2. 86 8. 57 | | | | | * | � |
30 2 5. 71 14. 29 | | | | | * | | |
31 1 2. 86 17. 14 90% | ---- | ---- | ---- | ---- | *--- | ---- | ---- |
32 2 5. 71 22. 86 | | | | ** | | |
33 3 8. 57 31 . 43 | | | | * | | | |
34 3 0. 57 40. 00 | | | ( * � | | |
35 .4 11 . 43 51 . 43 80% | ---- | ---- | ---- | ---* | ---- | ---- | ---- |
36 6 17, 14 68. 57 | | | | * | | | |
37 2 5. 71 74. 29 | | | | * � | | |
38 1 2. 86 77. 14 | | | | * � | | |
39 0 0. 00 77. 14 70% | ---- | ---- | -- -- 1 --*- | ---- | ---- | ---- |
40 4 ' 11 . 43 88. 57 | | | | * | | | |
41 0 0. 00 88. 57 | | | | * | | | |
42 Cl 0. 00 88. 57 | | | | * | | | | ,
43 1 2. 86 91 . 43 60% | ---- | - - -- | ---- | -*-- | - --- | ---- | ---- |
44 0 0. 00 91 . 43 | | | | * | | | |
45 3 8. 57 100. 00 | | | | * | | | |
46 0 0. 00 100. 00 | | | | * | | | |
47 0 0. 00 100. 00 50% | ---- | ---- | ---- | -*-- | ---- | ---- | ---- |
48 0 0. 00 100. 00 | | | | * : | | |
49 0 0. 00 100. 00 | | | I * | | | |
50 0 0.00 100. 00 | | | | * | | | |
51 0 0. 00 100. 00 40% | ---- | ---- | ---- | -*-- | ---- | ---- | ---- |
52 0 0. 00 100. 00 | | | | * | | | |
53 0 0. 00 100. 00 | | | | * : | | |
54 0 0. 00 100. 00 | | | � * | | | |
55 0 0. 00 100. 00 3O1 | ---- | ---- | ----| *--- | ---- | ---- | ---- |
56 0 0. 00 100. 00 | | � | * | | |
57 0 0. 00 100. 00 | | | | * | | |
58 0 0. 00 100. 00 | | | | * | | |
59 0 0. 00 100. 00 20% | ---- | ---- | ----*---- | ---- | ---- | ---- |
60 0 0. 00 100. 00 | | | * | | |
61 0 0. 00 100. 00 | | | * | | |
62 0 0. 00 100. 00 | | | * | | | | | '
63 0 0. 00 100. 00 10I � ---- � ---- � ---* | ---- | ---- | ---- | ---- |
64 0 0. 00 100. 00 � | | * | | | | |
65 0 0. 00 100. 00 | | | *| | � | |
66 0 0. 00 100. 00 | | | * | | | | |
67 0 0. 00 100. 00 0% +*************------------- -_+
68 0 0. 00 100. 00 0 10 20 30 40 50 60 70
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Div. 17` ' Div. 17 — ray— y �voUh
y
nd none of ", fined Notice as Co rint
ie arrest , :' 40618. Wheneve oof of correction of violation is not received by the
tten noh� issuing agency in accordance with Section 40610, the issuing agency may
ion and to ,
�.�' deliver the signed promise to the court having jurisdiction of the violation � r
'. In lieu of r x with a certification that no proof of correction has been received. If prepared
)fficer may on a form approved by the Judicial Council, the promise under Section
.40610, together with the certification under this section, shall constitute a y
in shall l complaint to which the defendant may enter a plea, and upon which a x
issued be issued if the complaint is verified. c ,
:` warrant may P
lowing Added Ch. 1350,Stats. 1978. Operative July 1, 1979. 1 : ^.
i
CHAPTER 2.5. ADMINISTRATIVE ADJUDICATION OF I ,
orrect the ,1 TRAFFIC SAFETY VIOLATIONS
(Added Ch.722,Stats. 1978. Effective January 1, 1979) i
exist, the I (Repealed Ch. 722,Stats. 1978. Operative July 1, 1984) 1, `,<
le,and the < (Repealed Ch. 1116,Stats. 1933. Operative July 1, 1985) 1' _x ar+
,=•:12-,
to correct CHAPTER 3. ILLEGAL EVIDENCE l -.fli -,,
n addition ink-',4-
Lion, shall Article 1. Prosecutions Under Code l; :x441
and proof t Vehicle and Uniform Used by Officers ' 405,-,- ,. .y. �'
x3' + �
40800. Every traffic officer on duty for the exclusive or main purpose of 1, f ti � �
ve fee for ` E..
enforcing the provisions of Division 10 or 11 of this code shall wear a full 1, , , 'i-
)lation for distinctive uniform, and if the officer while so on duty uses a motor vehicle, I d. ':.�;,r ,;'1„ -
it must be painted a distinctive color specified by the commissioner. 1 ; f ' er
se. This section does not apply to an officer assigned exclusively to the duty I` ,, 4..
Ise. of investigating and securing evidence in reference to any theft of a vehicle 9 + ° ;
t or failure of a person to stop in the event of an accident or violation of Section 8I ; E .1
23109 or in reference to any felony charge, or to any officer engaged in a. P,., tr 7'.
serving any warrant when the officer is not engaged in patrolling the ∎ 4 r , � '
highways for the purpose of enforcing the traffic laws. I 3elivered Amended Ch. 202, Stats. 1961. Effective September 15, 1961. r a ti,. t...
Speed Trap Prohibition i "' h. F r`;h ,
40801. No peace officer or other person shall use a speed trap in arresting, i :; �,�' O ;
or participating or assisting in the arrest of, any person for any alleged ;; 1 """IV-,
violation of this code nor shall any speed trap be used in securing evidence
ificate of as to the speed of any vehicle for the purpose of an arrest or prosecution l'li$ °,
tor. P Y P P prosecution
under this code. 11v, 4ri,
Speed Trap� ,,
40802. A "speed trap" is either of the following: t :E, '.
ilteCof a (a) A particular section of a highway measured as to distance and with ;I:
Y boundaries marked, designated, or otherwise determined in order that the
nal1eged speed of a vehicle may be calculated by securing the time it takes the vehicle ]
to travel the known distance. ,
(b) A particular section of a highway with a prima facie speed limit '
tified as I I
violation provided by this code or by local ordinance pursuant to paragraph (1) of ;1
'r 20.3 of subdivision (b) of Section 22352, or established pursuant to Section 22354, il; �'`
1.2. 22357,22358, or 22358.3, which speed limit is not justified by an engineering $1
ified as and traffic survey conducted within five years prior to the date of the alleged ,
violation, and where enforcement involves the use of radar or other
•
deputy electronic devices which measure the speed of moving objects. The ,$ t,
provisions of this subdivision do not apply to local streets and roads. ",
trtment, For f urposes of this section, local streets and roads shall be defined by the ( '
cement latest functional usage and federal-aid system maps as submitted to the
Federal Highway Administration. When these maps have not been I .
submitted, the following definition shall be used: A local street or road
primarily provides access to abutting residential property and shall meet the h:
following three conditions: 1'
(1) Roadway width of not more than 40 feet. I 'at.: i Ptil i
lokft
PéT
i r , p ' , '■ Py`a f ry m°� 4. )' : t 's,a§ V #"' V` EE LEA " se (Ct 4,, mei,
"R ry,
III ,
I. Ii
1I!' ; § 40802 -800— Div. 17
1 11
. ' i � ' (2) Not more than one-half mile of uninterrupted length. Interruptions
'-;i 14 i, shall include official traffic control devices as defined in Section 445.
'1 (3) Not more than one traffic lane in each direction.
,li This section shall remain in effect only until January 1, 1993, and as of that
' ; ;1;. `i date is repealed, unless a later enacted statute, which is enacted before ,
f i`E1 January 1, 1993, deletes or extends that date.
,` ;III
Amended Ch. 1346,Stats. 1972. Effective March 7, 1973.
• �l j) Amended Ch. 203,Stats. 1973. Effective Jul. 9, 1973,by terms of an urgency clause.
\ ,t I Amended Ch. 1210,Stats. 1978. Effective January 1, 1979.
` Repealed Ch. 1210,Stats. 1978. Operative January 1, 1982. i
'i;1! Amended Ch. 357,Stats. 1981. Effective January 1, 1982.
i ''Repealed Ch. 357, Stats. 1981. Operative January 1, 1987.
r s i l;; Amended Ch. 833,Stats. 1986. Effective January 1, 1987.
Ii . }
NOTE: This section remains in effect only until January 1, 1993, at which time + ,
t,' ,� �� it is repealed and the following section becomes effective.
'I i 40802. A "speed trap" is either of the following
{is (a) A particular section of a highway measured as to distance and with t
•
ti 1 i boundaries marked, designated, or otherwise determined in order that the 1
LT speed of a vehicle may be calculated by securing the time it takes the vehicle f.
I to travel the known distance. 1
i+ i'' (b) A particular section of a highway with a prima facie speed limit 1 c
f , provided by this code or by local ordinance pursuant to paragraph (1) of t
,. 'i;!' subdivision (b) of Section 22352, or established pursuant to Section 22354, 1
22357, 22358, or 22358.3, which speed limit is not justified by an engineering c
, and traffic survey conducted within five years prior to the date of the alleged p t
„it,i violation, and where enforcement involves the use of radar or other
electronic devices which measure the speed of moving objects.
This section shall become operative on January 1, 1993. r
Amended Ch. 357, Stats. 1981. Operative January 1, 1987. 1
Amended Ch. 833, Stats. 1986. Effective January 1, 1987. • C
Ar{ &
Speed Trap Evidence •
s 'j, 40803. (a) No evidence as to the speed of a vehicle upon a highway shall ■ r
.1:, 6.1 be admitted in any court upon the trial of any person for an alleged violation t r
' ! of this code when the evidence is based upon or obtained from or by the t t;
maintenance or use of a speed trap. r
(b) In any prosecution under this code of a charge involving the speed s
, `' of a vehicle,where enforcement involves the use of radar or other electronic t r
devices which measure the speed of moving objects, the prosecution shall is
r: establish, as part of its prima facie case, that the evidence or testimony
presented is not based upon a speed trap as defined in subdivision (b) of
Section 40802. Evidence that a traffic and engineering survey has been
conducted within five years of the date of the alleged violation or evidence
that the offense was committed on a local street or road as defined in E
subdivision (b) of Section 40802 shall constitute a prima facie case that the
evidence or testimony is not based upon a speed trap as defined in r
subdivision (b) of Section 40802. u
Amended Ch. 357,Stats. 1981. Effective January 1, 1982. P
• v,
4? Testimony Based on Speed Trap •'
40804. (a) In any prosecution under this code upon a charge involving
1 ' 1 the speed of a vehicle, any officer or other person shall be incompetent as _ iii
a witness if the testimony is based upon or obtained from or by the a,
maintenance or use of a speed trap.
(b) Every officer arresting, or participating or assisting in the arrest of,of t az
person so charged while on duty for the exclusive or main purpose , C
enforcing the provisions of Divisions 10 and 11 is incompetent as a witness 1.
if at the time of such arrest he was not wearing a distinctive uniform,or was :
q;;t„.. using a motor vehicle not painted the distinctive color specified by the • Ice
commissioner. d
, '' Iii
I(. 'i,d
Div. 17 ` "�I
Div. 17 -801 - § 40831
Il,A
Interruptions i ,•''0:''F:
,
tion 445. This section does not apply to an officer assigned exclusively to the duty j !! ,
of investigating and securing evidence in reference to any theft of a vehicle i; f,
,and as of that or failure of a person to stop in the event of an accident or violation of Section i 1 'I
nacted before 23109 or in reference to any felony charge or to any officer engaged in I,j`
serving any warrant when the officer is not engaged in patrolling the
highways for the purpose of enforcing the traffic laws. j;i`
clause. Amended Ch. 58,Stats. 1961. Effective September 15, 1961. ,F
y Amended Ch. 84,Stats. 1978. Effective January 1, 1979.
Admission of Speed Trap Evidence
40805. Every court shall be without jurisdiction to render a judgment of
conviction against any person for a violation of this code involving the speed
3, at which time of a vehicle if the court admits any evidence or testimony secured in
violation of, or which is inadmissible under this article. i
Police Reports
tance and with 40806. In the event a defendant charged with an offense under this code
t order that the pleads guilty, the trial court shall not at any time prior to pronouncing
i.kes the vehicle sentence receive or consider any report, verbal or written, of any police or ):
traffic officer or witness of the offense without fully informing the defendant
cie speed limit t of all statements in the report or statement of witnesses, or without giving a
aragraph (1) of the defendant an opportunity to make answer thereto or to produce
a Section 22354, witnesses in rebuttal, and for such purpose the court shall grant a
an engineering continuance before pronouncing sentence if requested by the defendant.
to of the alleged Use of Evidence Regarding Departmental Action
radar or other �j.
• 40807. No record of any action taken by the department against a
jests. person's privilege to operate a motor vehicle, nor any testimony regarding 4
the proceedings at, or concerning, or produced at, any hearing held in !
connection with such action, shall be admissible as evidence in any court in tT
1 any criminal action.
? No provision of this section shall in any way limit the admissibility of such
records or testimony as is necessary to enforce the provisions of this code
1 a highway shall �` d
alleged violation relating to operating a motor vehicle without a valid driver's license or when E
I from or by the if the driving privilege is suspended or revoked, the admissibility of such
records or testimony in any prosecution for failure to disclose any matter at `.
olving the speed i such a hearing when required by law to do so, or the admissibility of such
other electronic records and testimony when introduced solely for the purpose of i
prosecution shall .4 impeaching the credibility of a witness. ; �q
ice or testimony Added Ch.804, Stats. 1977. Effective January 1, 1978.
ubdivision (b) of •7 f
survey has been Article 2. Civil Actions
ation or evidence Effect of Convictions I` ',
ad as defined in
acie case that the 40830. In either of the following circumstances a violation of any I
i as defined in provision of this code does not establish negligence as a matter of law, but 1`
p m any civil action under either of the circumstances negligence must be i t-.
I proved as a fact without regard to the violation. The circumstances under '1 %
which this section applies are either: ;
�, PP 1
(a) Where violation of the provision was required by a law of the federal l 'i't.
charge involving I government or by any rule, regulation, directive or order of any agency of 1,::
>e incompetent as it the federal government, the violation of which is subject to penalty under i j '.9
from or by the an act of Congress or by any valid order of military authority. f' ;';-
(b) Where violation of the provision was required in order to comply with , . .i
in the arrest of,oat. 4 any regulation, directive, or order of the Governor promulgated under the ' i `4'
main purppSe °f California Emergency Services Act.
)etent as a Witrie� Amended Ch.438,Stats. 1971. Operative May 3, 1972. i I ,,
or was `
ve uniform,o Effid of Speed Conviction t`
' i
r specified by the s
408.31. In any civil action proof of speed in excess of any prima facie limit
declared in Section 22352 at a particular time and place does not establish : '' .1'
negligence as a matter of law but in all such actions it shall be necessary to : , �'
V
! Y
fi �,9 -'.r.}