HomeMy WebLinkAboutItem 7.2 Speed Limit Stagecoach Rd (2) go
AGENDA STATEMENT
CITY COUNCIL MEETING DATE: August 26, 1985
PUBLIC HEARING
SUBJECT: Establishment of Speed Limit on
Stagecoach Road
EXHIBITS ATTACHED: 1) Ordinance
2 ) Speed Study by TJKM
RECOMMENDATION: 1) Open public hearing
2 ) Receive presentation by Staff and
Traffic Consultant
3 ) Receive public input
4 ) Close public hearing
5 ) Deliberate
6) Waive reading and adopt ordinance
on an urgency basis
FINANCIAL STATEMENT: Minor cost for speed limit signs .
DESCRIPTION: On May 13, 1985, the City Council
adopted a resolution regulating vehicular traffic on
Stagecoach Road. The Council also authorized the City
Traffic Engineer to conduct a speed survey on Stagecoach
Road for the purposes of using radar enforcement.
The Speed survey has been completed by TJKM and recommends :
1 ) The speed limit on Stagecoach Road in the existing
residential area (from Amador Valley Blvd. to a
point 1500 feet north) remain at 25 mph.
2 ) The speed limit on Stagecoach Road from 1500 feet
north of Amador Valley Boulevard to the northern
City limit be 35 mph.
-----------------------------------------------------------------
ITEM NO. COPIES TO:
ORDINANCE NO. -85
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) :
The declared speed limit for the following street segment
shall be established at 25 mph:
a . Stagecoach Road
0
From Amador Valley Boulevard to 1, 500 feet north.
Section 2 . THIRTY-FIVE (35) MILES PER HOUR (MPH) :
The declared speed limit for the following street segment
shall be established at 35 mph:
a. Stagecoach Road
From a point 1, 500 feet north of Amador Valley
Boulevard to the northern City limit.
Section 3 . IMMEDIATE EFFECT
This ordinance shall take effect immediately upon its
enactment because the adoption and immediate effect thereof is
necessary in order to protect vehicular and pedestrian safety.
Section 4 . 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, APPROVED AND ADOPTED by the City Council of the City
of Dublin on this 26th day of August, 1985, by the following
votes :
AYES :
NOES:
ABSENT:
Mayor
ATTEST:
City Clerk
MEMORANDUM
DATE: August 12, 1985
TO: Lee Thompson, City Engineer
City of Dublin
FROM: Ty Tekawa, Principal Associate
TJKM
SUBJECT: Stagecoach Road 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.
Sections 22357, 22348 and 22358 of CVC allows cities to establish various
speed limits on the basis of an 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.
TJKM conducted radar speed studies along Stagecoach Road between Amador
Valley Boulevard and the north city limit (copies of the study analysis are
attached) . Based on these studies, -a review of accident records and a
through field investigation; retention of the 25 mph speed limit is
recommended from Amador Valley Boulevard to 1,500 feet north. The speed
limit northerly from 1,500 feet to the north city limit is recommended to
be 35 mph. The City of San Ramon has recently posted a 25 mph zone between
the city limit line and Alcosta Boulevard. The justification for this
limit was the "residential nature" of Stagecoach Drive in that area.
In preparing these recommendations, TJKM has followed all applicable
provisions and requirements of 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 Stagecoach Road
with the use of radar.
Prevailing Speeds:
Radar speed surveys were conducted on Stagecoach Road on May 22 and
August 2, 1985, summaries of the radar survey for the location are
enclosed. The results are further summarized as follows:
Location on Number of Average 85th
Date Stagecoach Road Direction Vehicles Speed Percentile
5/22 2,500 feet North of North 50 29 35
Amador Valley Blvd. , South 50 29 39
Lee Thompson -2- August 12, 1985
Location on Number of Average 85th
Date Stagecoach Road Direction Vehicles Speed Percentile
8/02 700 feet North of North 54 38 45
Amador Valley Blvd. South 52 34 41
8/02 500 feet South of North 54 37 45
Southlake Drive South 58 37 45
8/02 Stagecoach Road @ North 70 36 44
Craydon Circle South 64 36 46
(San Ramon)
The 85th percentile speed is that speed at or below which 85 percent of the
observed vehicles are travelling. It is a well recognized fact among
traffic engineers that most drivers are able to drive at reasonable speeds
without the benefit of any speed limits, speed signs, or enforcement. The
behavior of traffic is a good indication of the appropriate speed zone
which should apply on a particular highway section. It is generally felt
that at least 85 percent of the drivers operate at speeds which are
reasonable and prudent for the conditions prevailing in each situation.
Therefore, the 85th percentile speed of a spot speed survey is the primary
indicator of a speed limit which might be imposed subject to the secondary
factors of accident experience, traffic volumes, road features or other
special situations.
The 85th percentile speeds on May 22nd were 35 mph for northbound traffic
and 39 mph for southbound traffic. The surveys taken on August 2nd showed
85th percentile speeds northbound at about 45 mph. The southbound 85th
percentile speeds varied from 41 to 46 miles per hour depending on the
section of roadway on which the survey was taken. The May 22nd speeds were
probably lower because some construction was still in progress on
Stagecoach Road. The August 2nd survey was taken when construction was
complete. Note that although San Ramon has , posted it's section of
Stagecoach Road at 25 mph average speed and 85th percentile speed are about
35 mph and 45 mph respectively.
Accident Records:
We are not aware of any accident problems along the portion of Stagecoach
Road north of the existing single family residences.
Conditions Not Readily Apparent to the Driver:
From Amador Valley Boulevard to 1,500 feet north, there is an island
dividing Stagecoach Road from a frontage road along single family
residences. There are openings in this island for access from the frontage
road onto Stagecoach Road which are not readily apparent to the driver.
There is also a crest of a vertical curve in this same area.
Lee Thompson -3- August 12, 1985
Recommendations:
Although 85th percentile speeds recorded within the section of roadway from
Amador Valley Boulevard to 1,500 feet north were 45 mph northbound and 41
mph southbound, it is recommended that the speed limit remain at 25 .mph as
posted. The conditions referred to in the previous paragraph dictate a
limit less than the recorded 85th percentile speed.
The 85th percentile speeds in the area from 1,500 feet north of Amador
Valley Boulevard to the north city limit varied from 35 to 45 miles per
hour. The lower speeds were logged during the May 22, 1985 survey. The
higher speeds occurred during the survey taken on August 2nd. The speed
study analysis sheets show that the 85th percentile speeds in this area are
not within the 10 mph pace (except one, which is at the high end of the
pace) . The 10 mph pace is the range within which the highest percentage of
the observed traffic drives. That pace was 34 to 43 for northbound traffic
and 29 to 38 for Southbound traffic. TJKM recommends a speed of 35 mph in
this section.
To summarize our recommendations, the speed limit from Amador Valley
Boulevard to 1,500 feet north should remain at 25 mph and the speed limit
from 1,500 feet north of Amador Valley Boulevard to the north city limit
should be 35 mph. It is recommended that the City Council enact these
speed limits by ordinance. These speed limits will be effective and
enforceable only after posting of appropriate speed limit signs.
nlc
Attachments
15701
SPOT SAED STUDY ANALYSIS
FOR THE CITY OF DUBLIN '
LOCATION STAGECOACH RD. 700 FEET NORTH OF A ' DOR VALLEY BL.
DEVELOPMENT RESIDENTIAL
DIRECTION NORTHBUND 50th PERCENTILE SPEED 38
DAY OF THE WEEK FRIDAY 85th PERCENTInE SPEED 45 '
DATE 8-2-85 10 MPH PACE SPEED 34 TO 43
TIME OF THE DAY 14: 15 - 15: 15 PERCENT IN PACE SPEED 64
POSTED SPEID LIMIT 25 RANGE 04 SPEEDS 29 TO 50
VEHICLES OBSERVED 54 SKEWNESS INDEX 1. 18
CUMULATIVE SpEED CURVE
SPEED NUM- PERCNT. CUMUL.
(MPH) BER OF TOT. PRCmT. 100%
29 1 1. 85 1. 85 | | | | | 00400000000 /
30 2 3. 70 5. 56 | / | | \ 01 | |
31 2 3. 70 9. 26 / | | ( | 001
32 2 3. 70 12. 96 90% | ----� ----| ----/----| -��-| ----i ----/
33 2 3. 70 16. 67
34 2 3. 70 20. 37
35 4 ' 7. 41 27. 78
36 3 5. 56 33. 33 80% | ----|----/ ----| ----| ��--/ ----|----|
37 6 1- 1. z1 44. 44
38 3 5. 56 50. 00
39 2 3, 70 53. 70
40 9 16. 67 70. 37 70% } ----i ----/ ----| ---�'�---` ----� ----|
41 1 1. 85 72. 22
42 l 1. 85 74. 07
43 4 7. 41 81. 48
44 I 1. 85 83. 33 60% | ----i ----| ----| ----�----/ ----' ----�
45 4 7. 41 90. 74
46 z 1. 85 92. 59
47 0 0. 00 92. 59 | 1 | 1 00 / � |
48 2 3. 70 96. 30 50% / ----! ----| ----� ---� | -----| ----! ----|
49 1 1. 85 98. 15 | | | | 01
50 1 1. 85 100. 00 | | | | * !
51 0 0. 00 100. 00 | | | ( 001 | | |
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
56 0 0. 00 l00. 00 30% / -----i ----| ----|--�-� -----| -----/ ----|
57 0 0. 00 100. 00 | / | | 00
58 0 0. 00 100. 00 | | | | 0
59 0 0. 00 100. 00
60 0 0. 00 100. 00 20% i ----| ----� ----/-�--/ -----/ ----/ ---_|
61 0 0. 00 100. 00
62 0 0. 00 i00. 00
63 0 0. 00 100. 00
64 0 0. 00 100. 00 10% l ----/ ----� ----/ �_--/ ----| ----/ -___/
65 0 0. 00 100. 00 1 / | 00
66 0 0. 00 100. 00 | 0
67 0 0. 00 l00. 00
68 0 0. 00 100. 00 0%
0 10 20 30 40 50 60 70
SPEED (MPH)
SPOT SPEED STUDY ANAL 1�I S
FOR THE CITY OF DUBLIN
LOCATION STAGECOACH RD. 700 FEET NORTH OF A' ADOR VALLEY 81_.
DEVELOPMENT RESIDENTIAL
DIRECTION SOUTHBOUND 50th PERCENTILE SPEED 34
DAY OF THE WEEK FRIDAY 85th PERCENTILE SPEED 41
DATE 8-2-85 10 MPH PACE SPEED 29 TO 38
TIME OF THE DAY 14: 15 - 15: 15 PERCENT IN RACE SPEED 69
POSTED SPEED LIMIT 25 RANGE On SPEEDS 21 TO 47
VEHICLES OBSERVED 52 SKEWNESS INDEX 1. 25
CUMULATIVE SPEED CURVE
- SPEED NUM- PERCNT. CUMUL.
(MPH) BER OF OT. RCvT. 117x`%
21 1 1. 92 1. 92
22 0 0. 00 1. 92 I I I 1 s bb l I I
23 0 0. 0I'D 1. 92 I ! 1 I ! I I I
24 1 1. 92 3. 85 90'l.
25 0 0. 00 3. 85 I I 1 1
26 11 ut. 0!ZI 3. 85 1 ! t ! I I t
27 1 1. 92 5. 77 1 ! t I �► t I I
28 _ 1. 92 7. 69 80%
29 4 7. 69 15. 38 i i I I 00 I 1 t
30 3 5. 77 21. !5 1 ! I I bb 1 I {
31 5 9. 62 30. 77 t i I i b 1
32 4 7. 69 38. 46 70%
33 . 1 1. 92 40. 38 I ! ! I b 1 ! 1 1
34 7 13. 46 53. 85 i I i 1 b l
35 4 7. 69 61.. 54 t I I I b l I !
36 2 3. 85 65. 38 60%37 5 9. 62 75. 00
!c 0 ! I 1 1 ado I 1 ! {
36 _ 1. 9 2 L 76. � 1 ! ! ! ! I I !
39 1 1. 92 18. 85
40 1 i. 92 80. 77 50%
41 3 5. 77 86. 54
42 1 1. 92 88. 46
43 2 . 3. 85 92. 31 ! ! I I b I I ► 1
44 1 1. 92 94. 23 40%
45 1 i. 92 96. 15 I 1 i 10 I ! I I
46 1 1. 92 98. 08 ! I I 10 1 ► I
47 1 i. 92 10IZ{. 0IZI I I 10 t I I
48 IZI 0. 00 100. 00 30%
49 0 0. 00 100. 00 I I I b I I ! {
50 0 0. 00 100. 00 I 1 I b I I 1
I
51 0 0. 00 100. 01z! I I I b ! f I
52 0 0. 00 100. 00 20%
53 0 0. 00 100. 00
54 0 0. 00 1 IZI IZI. !Z10
55 0 0. 00 100. 00
56 0 0. 00 1 IZI o. IZI 0 !0%
57 IZI 0. 00 100. 00
58 0 0. 00 10o. 00 1 1 i bb I I 1 I
1
59 0 0. 00 100. 0 i i i bb 1 I I i
60 111 0. 00 100. 00 ti'% �-�I►+Irb�b+�bbb�bb
IZI 10 20 30 40 50 60 70
SPEED (MPH)
SPOT SPEED STUDY ANALYSIS
FOR THE CITY OF DUBLIN
LOCATION STAGECOACH RD. 500 SOUTH 04 SUUTALAKE DR.
DEVELOPMENT RESIDENTIAL
DIRECTION NORTHBOUND 50th PERCENTILE SPEED 37
DAY OF THE w'EEK FRIDAY 8Sth PERCENTILE SPEED 45
DATE 8-2-85 10 MPH PACE SPEED 31 TO 40
TIME OF THE DAY 1i :35 - 12:30 PERCENT IN PACE SPEED 62
POSTED SPEED LIMIT 25 RANGE OF SPEEDS 24 Q 55
VEHICLES OBSERVED 54 SKEWNESS INDEX 1. 18
CUMULATIVE SPEED CURVE
SPEED NUM- r ERCNT. CUMUL.
(MPH) DER OF TOT. PRCNT. 100%
24 1 1. 85 1. 85 I I I I 1 0060 1 I
25 0 0. 00 1. 85 I f I I I *of I I
26 0 0. 00 1. 85 ! f i t I 00 1 I I
87 0 01. 00 1. 85 90%
28 1 1. 85 3. 70 I i 1 1 0 I 1 !
29 0 0. 00 3. 70 l ! 1 10
30 2 3. 70 7..41 I I 1 f 10 I I 1
31 4 7. 41 14. 81 80%
32 4 7. 41 22. 88 1 1 1 1
I 1 I
VV J
5. 56 27. 78 1 1 1 1 10
34 4 7. 41 35. 19 t I E i i o I I i
35 2 3. 70 38. 89 70%
36 5 9. 2E 48. 15 I I i I of
37 4 7. 41 55. 56 I I I I # 1 I 1 I
38 5 9. 26 64. 81 I i I i qra� t I I I
39 0 0. 00 64. 81 60•l.
40 3 5. 56 70. 37
41 0 0. 00 70. 37
42 1 1. 85 72. 22 1 I I 1 qb t I I I
43 2 3. 70 75. 93 50%
44 3 5. 56 81. 48 1 1 ! 1 00
45 4 7. 41 88. 83 I I t I I I I I
46 2 3. 70 92. 59
47 2 3. 70 96. 30 40%
48 0 0. 00 96. 30
49 1 1. 85 98. 15 i t 1 100 1 ! 1 !
50 0 0. 00 98. 15 I 1 I 1 * 1
51 0 0. 00 98. i5 30% i I I I i i I
52 0 0. 00 98. 15 i ! 1 10 1 ! I I
53 0 0. 00 98. 15 I ! I 10 i I I 1
54 0 0. 00 98. 15 t I I I o 1
55 1 1. 85 100. 00 20%
56 0 0. 00 100. 00
57 0 0. 00 100. 00
58 0 0. 00 100. 00
59 0 0. 00 100. 00 10%
60 0 0. 00 100. 00 ! I 1 �► I I i !
61 0 0. 00 100. 00 i I I dad I 1 t j
62 0 0. 00 100. 00 I I ! �►c� 1 I I I I
63 0 0. 00 100. 00 0'/. +���► $�,�,�,��,�,�
0 10 20 30 40 50 60 70
SPEED (MPH)
SPOT SPEED STUDY ANALYSIS
FOR THE CITY OF DUBLIN
LOCATION STAGECOACH RD. 500 FEET SOUTH O1- 8(JUTHLAKE DR.
DEVELOPMENT RESIDENTIAL
DIRECTION SOUTHBOUND 50th PERCENTILE S:,tED 37
DAY OF THE WEEK FRIDAY 85th PERCENTILE SPEED 45
DATE 8-2-85 10 MPH PACE St-'SEED 34 TO 43
TIME OF THE DAY 11 :35 - 12:30 PERCENT IN PACE SPEED 62
POSTED SPEED LIMIT c5 RANGE O:- S:,EEDS 25 TO 51
VEHICLES OBSERVED b8 SKEWNESS INDEX 1. 11
CUMULATIVE SPEED CURVE
SPEED NUM- PERCNT. CUMUL.
(r1.--'H) B E R OF TOT. P;;CNT. 100%
25 1 1. 72 1. 72 i i I I I 000000000 i
26 0 0. 00 1. 72 1 ! 1 I t 001 1 1
27 0 0. 00 1. 7E I I ! i I 0 1 1 1
28 3 5. 17 6. 90 90% I t t I I -0-I 1 t
29 .: 5. 17 12. 07 1 I ! I 1 00 1 1 1
30 1 1. 72 13. 79 1 1 ! I 1 0 1 1 1
31 2 3. 45 17. 24 1
32 2 3. 45 20. 69 80%
33 0 0. 110 20. 69 t 1 I 1 I0 I I f
34 4 6. 90 27. 59 I I 1 1 00 I I I
35 5 8. 62 36. 21
36 7 12. 07 48. 28 70% I i I I -0 ► I I
37 3 5. 17 53. 45 t 1 ! ! 0 1 1 1
38 4 6. 90 60. 34 1 1 J I 00 1 1 1
39 3 5. 17 65. 52 I t I I 01 1 I I
40 2 3. 45 68. 97 60%
41 4 6. 90 75. 86 I t I I 01 1 I i
42 1 1. 72 77. 59 i f I I 01 1 I I
43 3 5. 17 82. 76 f 1 1 1 001 1 t I
44 1 1. 72 84. 48 50% t I 1
45 2 3. 45 87. 93 I t f ! 0 1 I I I
46 2 3. 45 91. 38 I I 1
47 3 5. 17 96. 55
48 1 1. 72 98. ::8 40'/. I i : -�►-i I I I
49 0 0. 00 98. 28 1 1 1
50 0 0. 00 98. 28 I I I I 00 1
51 1 1. 72 100. 00 I I ! 10 1 t 1
52 0 0. 00 100. 00 30% t I i 1 -0-I I t i
53 Il 0. 00 100. 00 1 I t 1 0 f I ! I
54 0 11. 1'11 100. 0121
55 11 0. 00 100. 00 t I I 10 I ! t I
56 0 0. 00 100. 00 20% 1 -1 -i -1-1 1
57 0 0. 00 100. 1i0 i I I
58 0 0. 00 100. 00 1 t 1 4r0 1 I 1 I
59 0 0. 00 100. 010 1 I I 0 1 I I I
611 0 0. 00 100. 00 10% 1 0 1 1 I
61 0 0. 00 100. 00 f I I 01 i I ► I
62 0 0. 00 100. 00 I t 1 01 i i I I
63 0 0. 00 100. 00 I I I 01 I I I !
64 0 0. 00 1110. 00 0% �000ap00000�►000a
0. 10 20 30 40 50 60 70
S:-'EED (MPH)
SPOT SPEED STUDY ANALYSIS *
FOR THE CITY OF DUBLIN
LOCATION STAGECOACH RD. @ CRAYDON CIR.
DEVELOPMENT RESIDENTIAL
DIRECTION NORTHBOUND 50th PERCENTILE SPEED 36
DAY OF THE WEEK FRIDAY 85th PERCENTILE SPEED 44
DATE 8-2-85 10 MPH PACE SPEED 30 TO 39
TIME 04 THE DAY 9:55 - 11 :30 PERCENT IN PACE SPEED 61
POSTED SPEED LIMIT 25 RANGE OF SPEEDS E8 O 49
VEHICLES OBSERVED 70 SKEWNESS INDEX 1. 25
CUMULATIVE SPEED CURVE
SEED NUM- PERCNT. CUMUL.
(!KPH) BER OF 707. PRCiNT. 11210 lh�i9��{►4�+�IIA-t
28 1 1. 43 1. 43
29 2 2. 86 4. 29
30 3 4. 29 8. 57 ! I 1 I { I t I
31. 4 5. 71 14. 29 90%
32 6 8. 57 22. 86 I I t 1 I f I !
33 3 4. 29 27. 14
34 3 4. 29 31. 43 I ! I ! 10 1 ! I
35 10 14. 29 45. 71 80%
36 4 5. 71 51. 43 ! I ! I I I
37 5 7. 14 58. 57 t I 1 I ! ! I
38 2 2. 86 61. 43 I
39 3 4. 29 65. 71 70% 1
40 2 2..86 68. 57 1 I I I ► I I
41 3 4. 29 72. 86 ! I I I +a I I I I
42 6 8. 57 81. 4
43 2 2, w 84. 29 60/
44 3 4. 29 88. 57
45 2 2. 86 91. 43
46 2 2. 86 94. 29 I 1 1 f I ! I I
47 0 0. 00 94. 29 50%
48 2 2. 86 97. 14
49 2 2. 86 100. 00
50 0 0. 00 100. 00
51 0 Q1. 00 100. 00 40%
52 0 0. 00 100. 0121
53 0 0. 00 100. 00
54 0 0. 00 100. 00
55 0 0. 00 100. 0121 3121'/-
56 0 0. 00 100. 00
57 0 0. 00 0 100. 00
58 0 0. 00 100. 00 I ! I �► ! I I I
59 0 0. 00 100. 00 20
6121 0 0. 00 1010. 00
61 0 0. 00 100. 120 ! I ! 4p 1 I I t
62 0 0. 00 100. 00
63 0 0. 00 100. 00 10% I i ! -�6► ! !
64 0 0. 00 100. 00 i i I 00 1 i 1 1
65 0 0. 00 100. 00 I ! I 01 t 1 1 1
66 0 0. 00 100. 00 00 I I I 01 i I 1 1
67 Q1 0. 00 100. 00 0% L*000000000000#
0 10 20 30 40 50 60 70
SPEED (MPH)
SPOT SPEED STUDY ANALYSIS
FOR THE CITY OF DUBLIN
LOCATION STAGECOACH RD. @ CRAYDOiN C I R.
DEVELOPMENT RESIDENTIAL
DIRECTION SOUTHBOUND 50th PERCENTILE SPEED 36
DAY OF THE WEEK 'RIDAY 85th PERCENTILE SPEED 46
DATE 8-2-85 10 MPH :=DACE SPEED 31 TO 40
TIME OF THE DAY 9:55 - 11 :30 PERCENT IN PACE SPEED 67
POSTED SPEED LIMIT 25 RANGE OF SPEEDS 29 TO 52
VEHICLES OBSERVED 64 S EWiNESS INDEX 1. 44
CUMULATIVE SPEED CURVE
SPED NUM- r ERCNT. CUMUL.
(,n!PH) BER OF TOT. PRLN f. i00% 00060001
29 1 1. 56 1. 56
30 1 1. 56 3. 13
31 4 6. 25 9. 38
32 2 3. 13 12. 50 90%
33 5 7. 81 20. 31
34 3 4. 69 25. 00
35 15 23. 44 48. 44 I I ! I ! 00 I I f
36 1 1. 56 50. 00 60%
37 3 4. 69 54. 69 ! I I i 100 t I t
38 4 6. 25 60. 94 I ! { ! 1 * I I
39 1 1. 56 62. 50
40 5 7. 81 70. 31 70%
41 2 3. 13 73. 44
42 1 1. 55 75. 00 r I I I I I
43 3 4. 69 79. 69
44 0 0. 00 79. 69 60%
45 2 3. 13 82. 81
46 2 3. !3 85. 94
47 3 4. 69 90. 63 i ! 1 I Qdti► I I I i
48 1 1. 56 92. 19 50%
49 2 3. 13 95. 31
50 2 3. 13 98. 44 1 ! I I aM ! I I I
51 0 0. 00 98. 44 ! ! ! I de t I I I
52 1 1. 56 100. 00 40%
53 0 0. 00 i0o. 00
54 141 0. 00 100. 00
55 0 0. 00 100. 00
56 QI 0. 00 100. 00 30'i. I ! I I -�►-I 1 f I
57 0 0. 00 100. 00 t I 1 I •d t I i I
58 0 0. 00 100. 00
59 0 0. 00 100. 00 f ! I I I ! I
60 0 0. 00 100. 00 20%
61 0 0. 00 i 0o. 00
62 0 0. 00 100. 00
63 0 0. 00 100. 00
64 lzi rZl. 00 100. 00 10%
65 0 0. 00 100. 00 I I ! �4► I ! t
66 0 0. 00 100. 00 I I ! t ! 1 !
67 0 0. 00 100. 00 I ! ! +b ! f 1 I
68 0 0. 00 100. 00 0%
0 10 20 30 40 50 60 70
SEED (MPH)
SPOT SPEED STUDY ANALYSIS
FOR THE CITY OF DUBLIN
LOCATION STAGECOACH RD. 5500 FEET NORTH OF AMADOR VALLEY RD.
DEVELOPMENT RESID. /OPEN
DIRECTION NORTHBOUND 50th PERCENTILE SPEED 29
DAY OF THE WEEK. WEDNESDAY 85th PERCENTILE SPEED 35
DATE 5-L.L.-85 10 MPH PACE SPEED 26 TO 35
TIME OF THE DAY 11 :40-12:50PM PERCENT IN PACE SPEED 72
POSTED SPEED LIMIT 25 RANGE OF SPEEDS 21 TO 47
VEHICLES OBSERVED 55 SKEWNESS INDEX 1. 41
CUMULATIVE SPEED CURVE
SPEED NUM- PERCNT. CUMUL.
(MPH) BER OF TOT. PRCNT. 100%
21 3 5. 45 5. 45 I I I I I ••+++••••o I
22 ib 0. 00 5. 45 I I I I I + I I I
23 0 0. 00 5. 45 I I I I ++• I I I
24 2 3. 64 9. 09 90%
25 2 3. 64 12. 73 I I I I • ! I I I
26 6 10. 91 23. 64 I I ( 1 •• I 1 I I
27 5 9. 09 32. 73 I I I I • I I 1 I
28 5 9. 09 41. 82 80% I I-1-i
29 6 14. 55 56. 36 1 1 1 1 • I I I I
30 2 3. 64 60. 00 1 1 1 1 •+ 1 I I I
.:,1 3 5. 45 65. 45 1 1 I I • I t I I
3
5. 45 70. 91 70%
33 3 5. 45 76. 36 1 1 1 I • f I I I
34 1 1. 82 78. 18 1 1 1
35 4 7. 27 85. 45 1 1 1 • I I I I
36 1 1. 82 87. 27 60% 1 -1 -1
-• i I I I
37 2 3. 64 90. 91 I I I o I I I I
38 1 1. 82 92. 73 I I I •• I I 1 I
39 Q1 0. 00 92. 73 I I I + I t I I I
40 0 0. 00 92. 73 50. 1-1 -1
41 1 1. 82 94. 55 1 1 1 •I I I 1 I
42 1 1. 82 96. 36 1 1 1 • I I i I I
43 1 1. 82 98. 18 1 1 1 •I I I 1 I
44 0 0. 00 98. 18 40% 1 -1 -1
I I I I I
45 lzi 0. 00 98. 18 I I I •I 1 f I I
46 Ql 0. 00 98. 18 I I I • I I ( I I
47 1 1. 82 100. 00 I I I ••I f I I I
48 izi 0. 00 100. 00 30Y 1-1 -1
-•-I I I I 1
49 0 0. 00 100. 00 1 I I • I I I I I
50 Qi 0. 00 100. 00 I I I • I I I I I
J1 0 0. 00 100. 00 I I I • I I I I I
52 0 0. 00 100. 00 20% 1-1 -1
-•-I I I I
f
53 0 0. 00 100. 00 I I I • I I I I I
54 0 0. 00 100. 00 1 I I + I I I 1 1
55 0 0. 00 100. 00 1 I I •• I I I I 1
56 0 0. 00 100. 00 10% 1
57 0 0. 00 100. 00 1 1 I • I I I I i
58 0 0. 00 100. 00 1 I I •• I I I I I
59 0 0. 00 100. 00 1
60 0 0. 00 100. 00 0% L•••••••++••
0 10 20 30 40 50 60 70
SPEED (MPH)
SPOT- SPEED STUDY ANALYS,z
FOR THE CITY OF DUBLIN
LOCATION STAGECOACH RD. 2500 FEET NORTH OF AMADOR VALLEY RD.
DEVELOPMENT RESID. /OPEN
DIRECTION SOUTHBOUND 50th PERCENTILE SPEED G9
DAY OF THE WEEK. WEDNESDAY 85th PERCENTILE SPEED 39 `
DATE 5-22-85 10 MPH PACE SPEED 25 TO 34
TIME OF THE DAY 11 :40-12:50PM PERCENT IN PACE SPEED 64
POSTED SPEED LIMIT 25 RANGE OF SPEEDS 20 TO 48
VEHICLES OBSERVED 50 SKEWNESS INDEX 1. 24
CUMULATIVE SPEED CURVE
SPEED NUM- PERCNT. CUMUL.
(MPH) BER OF TOT. PRCNT. 100%
20 1 2. 00 2. 00 1 I I I 1 000000000
21 3 6. 00 8. 00 I I I ! I • I I I
22 1 2. 00 10. 00 I I I I 0• I 1 I
23 0 0. 00 10. 00 90%
24 2 4. 00 14. 00 I I I I • I I I I
25 3 6. 00 20. 00 1 1 1 1 01 1 f I
26 3 6. 00 26. 00 1 1 1 1 •0I I I f
27 3 6. 00 32. 00 80% 1
28 7 14. 00 46. 00 1 1 1 l0• I I 1 1
29 5 10. 00 56. 00 1 1 1 I0 I I I I
30 3 6. 00 62. 00 1 I I t o I I I I
31 1 2. 00 64. 00 70%
32 2 4. 00 68. 00 1 1 1
33 3 6. 00 74. 00 1 1 1 a I I I I
34 2 4. 00 78. 00 1 1 1 0 I I I !
35 0 0. 00 78. 00 60% 1-1-1
36 2 4. 00' 62. 00 1 I I o f I 1 I I
37 0 0. 00 82. 00
38 1 2. 00 84. 00
39 1 2. 00 86. 00 50%
40 2 4. 00 90. 00 I I I 01 1 I I !
41 1 2. 00 92. 00 I 1 1 **I I I 1 I
42 1 2. 00 94. 00 1 1 1 0 1 I I 1 f
43 1 2. 00 96. 00 40/ 1 -1-1
44 1 2. 00 98. 00 1 1 1 • I I I I I
45 0 0. 00 98. 00 1 I I o f I I I I
46 it 0. 00 98. 00 L I I 0 1 I I I I
47 0 0. 00 98. 00 30%
48 1 2. 00 100. 00 I 1 I o 1 I I I I
49 0 0. 00 100. 00 I I I oo I I I I I
50 0 0. 00 . 100. 00 I I l a I I I I 1
51 0 0. 00 100. 00 20'/.
52 0 0. 00 100. 00 ! I l a I I 1 I
. .
0 0 00 100 00 1
53 I I l a I I 1 I 1
54 0 0. 00 100. 00 I I I0o I I I I I
55 0 0. 00 100. 00 10% I I t o I I I I I
56 0 0. 00 100. 00 1 I 00 I I I I I
57 0 0. 00 100. 00 I 1 a I I I I I
58 0 0. 00 100. 00 I I 0 I I I I I
59 Qi 0. 00 100. 00 0- '-0a0ma00000
0 10 20 30 40 50 60 70
SPEED (MPH)