HomeMy WebLinkAbout2007/02/13 Item 3
CITY COUNCIL
AGENDA STATEMENT
~f::. CITY OF
-- - - - (HULA VISTA
2/13/07 Item~
ITEM TITLE:
Ordinance Establishing the Speed Limit on First
A venue betwe~n Palomar Street and Quintard Street at 25 mph.
Ordinance Establishing the Speed Limit on First
A venue betwe~n Quintard Street and the southern terminus of
First Avenue at 25 mph.
SUBMITTED BY:
REVIEWED BY:
CITY ENGINEER../J /;""
INTERIM ClTY MANAGER }I
4/5THS VOTE: YES
NO X
BACKGROUND
Based on provisions of the Californi~ Vehicle Code, pursuant to authority under the
Chula Vista Municipal Code, and at the direction of the City Engineer, the following
Engineering and Speed Surveys have b~en performed:
.
First Avenue between Palomar ~treet and Quintard Street;
First Avenue between QuintardiStreet and Southern Terminus of First Avenue.
.
Based on the results of these Surveys, the establishment of a speed limit of 25 mph is
recommended.
ENVIRONMENTAL REVIEW
The Environmental Review Coordil(lator has reviewed the proposed project for
compliance with the California Enviropmental Quality Act (CEQA) and has determined
that the project qualifies for a Class I l:ategorical exemption pursuant to Section 153301
(c) (Existing Facilities) of the State c1EQA Guidelines because the streets are existing
facilities. Thus, no further environmental review is necessary.
RECOMMENDATION
That Council adopt the Ordinances:
3-1
Date, Item~
Page 2 of5
. Establishing the speed limit ,on First Avenue between Palomar Street and
Quintard Street at 25 mph.
. Establishing the speed limit on First Avenue between Quintard Street and the
southern terminus of First Avenue at 25 mph.
BOARDS/COMMISSION RECOMMENDATION
The Safety Commission, at their i meeting of November 9, 2006, voted five
Commissioners to two, to concur with $taff s recommendation to establish the speed limit
on First Avenue between Palomar Stre~t and the southern terminus of First Avenue at 25
mph.
DISCUSSION
In July 2006, staff received a phone qall from Mr. Sam Pritchard who resides at 1324
First Avenue. Mr. Pritchard was conc~rned about excessive speeding on First Avenue in
the vicinity of Prospect Street, especiapy when Castle Park Middle School is in session,
and requested the installation of all-wa~ stop control measures at the intersection of First
Avenue and Prospect Street (see Atta~hment I for Location Map). In response to Mr.
Pritchard's request, staff researched th~ traffic patterns of the intersection and determined
that, based on volume data and accidedt history, the intersection does not warrant all-way
stop control. In addition, it was detetInined that stop signs at the intersection of First
Avenue and Prospect Street would no~ result in the outcome desired by Mr. Pritchard.
However, it was determined that the ~otential for a speeding problem exists along First
Avenue, thus the street segment wasj further analyzed to determine a solution to the
problem. Currently these portions of,First Avenue do not have speed limit signs. The
following table shows the existing con4itions for First Avenue:
Physical Conditions
Segment Limits
Len th/Width
Classification
ADT ear
Exist. Seed Limit
85' % Seed
Number of Lanes
Stri in
On-Street Parkin
Land Use
Horizontal AIi nment
Palomar Street to Quintard Street
0.25 mi. / 40'curb to curb
Residential Collector
1,211 2006)
None
32 m h
Two Lanes (One er direction)
None
Allowed
Residential
Tan ent
A crest ve1tical curve, located 220' south of Palomar Street,
with a +11.50% to -2.50% grade change over 80' along the
cent rline accommodates a 31 m h desi seed
Vertical Alignment
Accident Rate:
Se ment / State Av
6.03/1.95 (per million vehicle miles)
3-2
Special Conditions
Date, Item~
PaQe 3 of 5
I Direct re*dential driveway access; adjacent to Castle Park
Middle School
Segment Limits Quintard Street to Southern End
LenethfWidtb 0.24 mi.! 40'curb to curb
Classification Residential Collector
ADT (Year) 1,211 (2006)
Exist. Speed Limit . None
85'h% Speed 25 mnh
Number of Lanes Two Lanes (One per direction)
Stripine None
On-Street Parkin!! . Allowed
Land Use . Residential
Horizontal Alienment Tan2:ent
A sag verttical curve, located 190' south of Quintard Ave.,
Vertical Alignment with a -4.00% to +2.50% grade change over 80' along the
cent~rline accommodates a 31 mnh desirn sneed
Accident Rate: No reported collisions over a three-year study period
Seement! State Av!!.
Special Conditions None
Field observations and data reveal that First Avenue from Palomar Street to its southern
end is relatively flat, has no horizon~l curves, and has long segments with little side
friction allowing motorists to sustaiQ moderate speeds for extended periods of time.
While there have only been two recOlided accidents within the last three years between
Palomar Street and Quintard Street, the accident rate is above the state average. As a
result of the field observations and communication with residents living in the area, the
posting of speed limit signs is the appnopriate first step in an effort to reduce speeding in
the area.
Prior to preparing an Engineering and rrraffic Survey for the roadway segment, staff first
researched 25 mph prima facie speed 1imit requirements. Based on the provisions of the
California Vehicle Code (CVC) and Ithe Manual on Uniform Traffic Control Devices
(MUTCD) 2003, the following criteria must be met in order to qualify for a 25 mph
prima facie speed limit:
Roadway must be in a 'Residence District' and
o Upon one side of !the highway, within 0.25 miles, the contiguous
property fronting thbreon is occupied by 13 or more separate dwelling
houses or business s~ctures; OR
o Upon both sides of the highway, collectively, within a distance of 0.25
miles the contigu01.(s property fronting thereon is occupied by 16 or
more separate dwell~ng houses or business structure.
Roadway cannot exceed y, inile of uninterrupted length.
Roadway cannot exceed 40r in width (curb-to-curb).
3-3
Date, Itern~
Page 4 of5
First Avenue between Palomar Street Imd Quintard Street qualifies for a 25 mph prima
facie speed limit because it is 40' wi<ile curb-to-curb, has 18 separate dwelling houses
fronting both sides of the street, and ,S 0.25 miles in length. However, First Avenue
between Quintard Street and the south~rn terminus does not qualify for a 25 mph prima
facie speed limit because this segment: only has eight separate dwelling houses fronting
the street. Although the segment north of Quintard Street qualifies for a prima facie
speed limit of 25mph, speed surveys Were performed for both segments of First A venue
in order to gain more understanding of the reported speeding problem.
The speed surveys were performed in accordance with the CVC, which indicates that the
posting of speed limits be determined ~y an Engineering and Traffic Survey which shall
include: (I) prevailing speeds as detehnined by traffic engineering measurements; (2)
accident records; and (3) traffic/roadsjde conditions not readily apparent to the driver.
The 2003 MUTCD states that speed Ijmits should be established at the nearest (5mph)
increment to the 85th percentile speed, !which is defined as that speed at or below which
85 percent of the traffic is moving, unless engineering judgment recommends otherwise
based on roadway characteristic factob. Speed limits higher than the 85th percentile
speed are not generally considered rea40nable and safe. Limits below the 85th percentile
do not facilitate the orderly movement! of traffic. Speed limits established on this basis
conform to the consensus of those who i drive the street as to what speed is reasonable and
safe, and are not dependent on the ju~gment of one or a few individuals. Only when
roadside development results in a trafflc conflict and unusual conditions, which are not
readily apparent to drivers, may speed l~mits be posted below the 85th percentile speed.
As described above, the speed limit shdluld be established at the nearest 5 mph increment
to the 85th percentile speed. Based o~ this criterion, the 85th percentile speeds on First
Avenue north of Quintard Street (32 mPh) and south of Quintard Street (25 mph) support
speed limits of 30 mph and 25 mph, , respectively. However, in accordance with the
MUTCD, engineering judgment may i~dicate the need for a further reduction of 5 mph in
certain instances. Staff recommends aIlt additional 5 mph reduction in the speed limit for
the segment north of Quintard Street for the following reasons:
. First Avenue between Palomar! Street and Quintard Street is a residential street
I
and qualifies for a prima facie speed limit of 25 mph.
. Castle Park Middle School is l~cated at the northwest corner of First Avenue and
Quintard Street.
. An accident rate of 6.03 per million vehicle miles is higher than the state average
rate of 1.95 per million vehicle i;niles for a similar street. (Two reported collisions
within a three year study period).
. The installation of 25 mph spee~ limit signs along this roadway will reinforce the
fact that First Avenue at this location is a residential street and will serve as a
warning to motorists to slow doj,vn.
Staff recommends posting the 25 mph limit signs throughout the two segments. This will
add consistency of speed limits on First Avenue from Palomar Street to its southern
terminus.
3-4
Date, Iteml
Page 5 of 5
CONCLUSION
Based on staffs research and field dat~, staff recommends establishing a 25 mph speed
limit on First Avenue from Palomar Street to its southern terminus.
Staff also recommends tbat Schedule X of the register maintained in the office of the City
Engineer be amended to include the following:
10.48.020 Schedule X - Establ~shed Soeed Limits in Certain Zones - Desirmated
Name of Street Beginning At Ending At Proposed Speed Limit
First Avenue Palomar Str(let Quintard Street 25 mph
First Avenue Quintard Street Southern End 25 mph
DECISION MAKER CONFLICT
Staff has reviewed the property holding~ of the City Council and has found no property
holdings within 500 feet of the boundaries of the property which is the subject oftbis
action.
FISCAL IMPACT
The cost to install signs and pavement legends is about $800.00, which will be funded
through the Public Works operating budget.
ATTACHMENTS
1. Location Map
2. First Avenue and Prospect Avenue Traffic Vol\1me Data
3. Engineering & Traffic Survey
4. MUTCD 2003 - CA Supplement on Engineeri~g & Traffic Surveys
Prepared by: Hasib Baha, Associate Civil Engineer, Engineering
3-5
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EventCounl-152 Page 1
SB ADT ; 604
MetroC~ Traffic Executive
E nt Counts
EventCount-152 - English IENUI
Datasets:
Site:
Filter time:
Name:
Scheme:
Units:
In profile:
[First Avenue] 58 Approach to />rospect Stlet
12:00 Wednesday, July 12, 200~ => 10:00 Friday, July 14, 2006
Factory default profile
Count events divided by two.
Non metric (ft, mi, fils, mph, Ib, tom)
1008 Events
ATTACHMENT 2
3-7
_._---"_._-,----_._._~'---,.~.- .,-,._"."._--
NB ADT = 607
MetroCou t Traffic Executive
Ve iele Counts
VehicleCounl-155 - Enalish IENU)
Dalasets:
Sile:
Filter lime:
Included classes:
Speed range:
Direction:
Separation:
Name:
Scheme:
Units:
in profile:
[First Avenue] Jusl south of Prqspect
12:00 Wednesday, July 12, 200~ => 12:00 Friday, July 14, 2006
1,2,3,4,5,6,7,8,9,10,11,12 .
5 - 100 mph.
North (bound)
All - (Headway)
Factory default profile
Vehicle classiflC2tion (ARX)
Non metric (f1, mi, fils, mph, Ib, tOIl1)
1049 Vehicles
. Wednesday, July 12, 2006 - Total=240 (Incomplete) , 15
0000 0100 0200 0300 0400 0500 0600 0700 oeoo 0900 1000 110
PM Ppk 1730 ~ 1130 (44). PM PHF-O.92
inute drops
1200 1300 1400 1500
o a 0 l.9
OliO 0
000 0
000 6
o 0 0 13
1&00 1700 1800 1900
33 35 3' 34
4 1 11 9
11 71214
10 10 9 6
8 11 ? 5
VehicleCount-155 Page 1
2000 2100 2200 2300
25 22 18 15
784 3
5 5 2 3
ass 6
5 4 7 3
5
2
,
1
. Thursday, July 13, 2006 - Total-607, 15 minute dro~
0000 0100 0200 0300 0400 0500 0600 0700 0800 0900 1000 110 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 2200 2300
. 2 2 1 , 13 22 " 3B 21 " 2 J7 " 33 J7 56 55 30 J4 26 2S 13 U
5 1 0 0 0 2 3 , 16 3 , 1 . 5 12 . 11 16 6 . . , 2 3 3
2 1 1 3 3 . , , , , 10 I 6 12 3 11 11 11 5 14 . , 5 3 0
0 0 0 0 1 3 , , 11 , 5 I , 12 10 , " 17 . 7 5 . 2 4 1
1 0 1 0 1 . , u . 5 . ; 17 , , 11 " 11 20 . . 2 . . 0
AM Peak 07.f5. 0845 (48), AM PHF-o,75 PM Peak 1815 -1715 (81), PM PHF-P.ao
. Frtday, July 14, 2006 - Total=202 (Incomplete), 15 minut dro~
0000 0100 0200 0300 0400 0500 0600 0700 0800 0900 1000 110 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 2200 2300
( 4 3 1 , 14 20 46 40 35 26
3 2 1 0 2 J 4 11 11 9 5
o 0 0 1 0 5 7 9 10 a 6 ~
1 0 2 0 . ~ 5 k2 6 4 7 ~
o 2 0 0 J 2 4 14 13 14 8 ~
3-8
WB ADT = 121
MetroCou t Traffic Executive
E ent Counts
EventCount-154 -- Enallsh IENUI
Datasets:
Site:
Filter lime:
Name:
Scheme:
Units:
In profile:
[Prospect Court] WB Approach !to First Avenue
12:00 Wednesday, July 12, 200~ => 12:00 Friday, July 14, 2006
Factory defaun profile
Count events divided by two. .
Non metric (ft. mi, fl/s, mph, Ib, tor>
179 Events .
3-9-
EventCount-154 Page 1
EventCount-153 Page 1
EB ADT = 179
MetroCou t Traffic Executive
Ev nt Counts
EventCount-153 - Enallsh IENUI
Datasets:
Site:
Filter Ume:
Neme:
Scheme:
Units:
In profile:
[Prospect Street] EB Approach ~ First Avenue
12:00 Wednesday, July 12, 200$ => 12:00 Friday, July 14, 2006
Factory default profile '
Count events divided by two.
Non metric (ft, mi, ftIs, mph, Ib, to~)
301 Events
. Wednesday, July 12,2006-66 (Inco"""lete), 15 minute d'
0000 0100 0200 0300 0400 0500 0600 0700 0800 0900 1000 110
1200 1300 1400 1500
000 s
o 0 0 0
o 0 0 0
000 4
000 1
1600 1700 1800
11 11 15
31'
1 3 ,
.,2
3 . .
1900
8
2
o
1
,
2000 2100 2200
, 2 3
1 1 1
2 1 1
2 0 1
o 0 0
:BOO
,
1
2
1
o
1
o
o
o
PM Puk 1745 .1845(171. PM PHF-D.71
. Thursday, July 13, 2006=179,15 minute drops
0000 0100 0200 0300 0400 0500 0600 0700 0800 0900 1000 no 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 2200 2300
1 3 0 0 2 ] . 2 8 10 13 1 8 . 1< 1 1< " 23 1< , 8 ] ,
1 2 0 0 0 2 1 2 0 1 2 1 1 ] 1 3 3 , . 2 3 1 0 0
0 0 0 0 1 0 0 0 0 2 . ~ 3 1 3 0 3 , . , 0 1 0 1 1
0 1 0 0 1 1 2 0 , , 3 , 0 2 . 2 , 2 2 0 2 1 0 3 0
0 0 0 0 0 0 1 0 2 2 2 . . 2 . . 3 2 , . 1 3 2 1 0
AM Peak 0930 .1030 115), AM PHF-o.83 PM Peak 1800 -1800 (23), PM PHF1'.M
. Friday, July 14, 2006=54 (Incomplete) ,15 minute drops I
0000 0100 0200 0300 0400 0500 0600 0700 0800 0900 1000 110 1200 1300 1-4.00 1500 1600 1700 1800 1900 2000 2100 2200 2300
1 1 , 0 . 0 . . 1< 1 8
0 1 0 0 0 0 1 3 3 3 ]
1 0 1 0 1 0 2 2 1 1 3 0
0 0 0 0 1 0 1 1 , 0 2 Q
0 0 . 0 2 0 0 0 , , 0 Q
3-10-u------
ATTACHMENT .3
SPEED LIMIT - ENGINEERING/TRAFFIC SURVEY
,
STREET: First Avenut
LIMITS: Palomar Strfet - Quintard Street
Length of Segment (ft): 1,320' (0.25Imiles)
I
Existing Posted Limit (mph): Not Posted '
SUMMARY OF SPEED SURVEYS
Segment: Palomar Str~et - Quintard Street
Date Taken: 11/2/2006
No. of Vehicles on Sample (cars): 100
85th Percentile (mph): 32
Range of Speeds Recorded (mph): 16 - 38
ROADWAY CHARACTERISTICS
Width (ft): 40' curb to curb
Total No. of Lanes: 2 total lanes (I perl direction)
Horizontal Alignment: Tangent
Vertical Alignment: A crest vertical c e, located 220' south of Palomar Street, with
a + 1.5% to -2.5% ade change over 80 fl. along the centerline
accommodates a design speed of 31 mph.
I -
TRAFFIC CHARACTERISTICS
Average Daily Traffic: 1211 (2006)
I
On-Street Parking: Restricted at inters~ctions
Special Conditions: Castle Park Middl, School is located at 160 Quintard Street. Residential arel
with single family dwellings with direct driveway access along entire segmen
Accident History: The accident rate ~ this segment is 6.03 (accidents per million vehicle
miles) which is hi&her than the rate of 1.95 for similar roadways in the State
ofCalifomia.
SURVEY RESULTS
Study was Prepared by: Erica Manci~la
Date: 11/2/2006 '
Recommendation: Establish a 45 mph speed limit due to
the accident irate and the special
conditions.
Date Recommendation Approved: . /~/J / ["
By: JlIDNewton' P.E.~R ~
Approved Speed Limit (mph): 25 mph ' ,
Per CVC 40803, Survey Expires: 11/2/2013
3-11
CITY OF CHULA VISTA - VEHICLE SPEED SURVEY
SEGMENT UNDER STUDY: First Street ( Palomar Street - Quintard Street)
DATE 10/23/2006 SURVEY SITE Mid-block 90STED SPEED Not Posted
MPH
50
49
48
47
46
45
44
43
42
41
40
39
38 /
37 /
36 / / /
35 0
34 /
~~O
31 / 0 0 0
30 / / / 0
29 / / 0 0
28 / / / /
27 / / / /
26 / / / /
25 / / / /
24 / / 0 0
23 / / / 0
22 / / 0 0
21 0 0 0
20 /
19 / 0
18 0
17
16 /
15
14
13
RECORDER: Erica Mancilla
DIRECTION:
5
TIME END 2:51 PM
N
'1"EATHER Clear
01 S-/
15
20 TOTAL
%
CUM%
TIME START 2:03 PM
10
I
1
1
I.
I,
1
1
1 1 100
1 1 99
3 3 98
1 1 95
1 1 94
o 5 5 93
O~~"
o 0 I ' 6 6 78
o 0 0 7 7 72
/ / 0 0 0 9 9 65
/ / / 0 0 0 010 12 12 56
/ 0 0 0 0 0 01 11 11 44
/ 0 0 0 0 i 9 9 33
000 7 7 ~
o 5 5 17
4 4 12
3 3 8
1 1 5
224
1 1 2
001
1 1 1
1
I
OTAL NUMBER OF VEHICLES:
100
H:\HOME\ENGINEER\TRAFFIC\Speed_Surveys\First Avenue RADAR- (Palomar Street-Quintard Street).xls.xls
3-12
SPEED LIMIT - ENGINEERING/TRAFFIC SURVEY
STREET: First Avenr
LIMITS: Quintard S eet - Southern Cul-de-sac
Length of Segment (ft): 1,275' (0.241 miles)
Existing Posted Limit (mph): Not Postedl
SUMMARY OF SPEED SURVEYS
Segment: Quintard S!reet - Southern Cul-de-sac
Date Taken: 1112/2006.
No. ofVehic1es on Sample (cars): 50
85th Percentile (mph): 25 mph
Range of Speeds Recorded (mph): 12 - 29
ROADWAY CHARACTERISTICS
Width (ft): 40' curb to curb
Total No. of Lanes: 2 total lanes (1 per direction)
Horizontal Alignment: Tangent
Vertical Alignment: A sag vertical cuwe, located 190' south of Quintard Street, with
I .
a -4.00% to +3.00% grade change over 160 ft. along the centerlIne
I
accommodates a ~esign speed of 25 mph.
TRAFFIC CHARACTERISTICS
Average Daily Traffic: 1211 (2006)
On-Street Parking: Allowed
Special Conditions: Single family dw~llings with direct driveway access located between
Bishop Street and! Sherwood Street.
I
Accident History: There are no repojied collisions within the three year study period. The
statewide accident rate for similar roadways in the State of California is 1.95
(accidents per milFon vehicle miles).
SURVEY RESULTS
Study was Prepared by: Erica Mancflla
Date: 1112/2006
Recommendation: Establish a ~5 mph speed limit due to
the 85th pe centile speed and the
road charac eristics.
Date Recommendation Approved: Ill,lod,
By: Jim'Newtory, P.E.~ ;e.7~
Approved Speed Limit (mph): 25 mph
Per CVC 40803, Survey Expires: 1112/2013
3-13
CITY OF CHULA VISTA - VEHICLE SPEED SURVEY
SEGMENT UNDER STUDY First Avenue (Quintar~- 400' S of Sherwood)
DATE 11/02/2006 SURVEY SITE 200 fl. S of $ishop SI. POSTED SPEED
TIME START 2:00 PM TIME END 3:16 PM YVEATHER Clear
DIRECTION: S =O! N -I
MPH 5 10 15 20 TOTAL % CUM%
50 I'
49 II
48 I'
47
46
45 I,
44
43 I
42 II
41
40
39 I
38 I
37 I
36 I
35 II
34
33 I'
32 I'
31
30 I
29 0 0 0 1 1 I, 5 5 50
28 I, 0 0 45
27 0 I' 1 1 45
24 1 1 1 I 3 3 41
23 0 0 0 1 1 5 5 38
22 0 0 1 I 3 3 33
21 0 0 0 1 1 5 5 30
20 0 0 0 1 1 1 6 6 25
19 0 0 1 3 3 19
18 0 1 1 3 3 16
17 0 0 0 3 3 13
16 0 0 10
15 1 1 1 1 , 4 4 10
14 1 1 2 2 6
13 1 1 1 3 3 4
12 1 1 1 1
11
RECORDER: DAVID NUNO OTAl NUMBER OF VEHICLES: 50
H:\HOME\ENGINEER\TRAFFIC\Speed_Surveys\First Ave RADAR- (E St - F St).xls.xls
3-14
ATTACHMENT 1
ENGINErRING AND
TRAFFlC SURVEY
I
CRlTERIA
MUlICD 2003 -
CA SUPPLEMENT
varlaDle ISDeen Limits on J!'reewavs - See evq 22355
Option: '
The following speed limits may apply:
. Whenever the Department of Transporta~on determines based upon an engineering and traffic
survey that the safe and orderly movemd,t of traffic upon any freeway segment will be facilitated by
the establishment of variable speed limitsj,
. The Department may erect, regulate, andlcontrol signs upon the state highway which is a freeway, or
any portion thereof; which, ifused, signs Ishall be designed to permit display of different speeds at
various times of the day or night.
. Such signs need not conform to the stan4rds & specifications per eve 21400, but if used, shall be
of sufficient size and clarity to give adeqlilate notice of the applicable speed limit.
May 20, 2004
3-15
MUTCD 2003 California Supplement
Page 2B-51
Minimum Soeed Limits on State m"hwavs t See eve 22400
Option:
The following speed limits may apply:
. Whenever the Department of TranspOlitation determines based upon an engineering and traffic
survey that slow speeds on any part o~a state highway consistently impede the normal and
reasonable movement of traffic, the DT' partment may determine and declare a minimum speed limit.
Appropriate signs giving notice shall en be installed on that segment.
. A motorist can be cited for stopping 0 impeding the normal and reasonable movement of traffic
unless the stop is necessary for safe oIjeration and in compliance with the law.
Emrlneerin" and Traffic Survev '
Support: .
eve Section 627 defmes the term "Engin4ering and traffic survey" and lists its requirements.
Standard: '
An engineering and traffic survey shall include, among other requirements deemed necessary by
the department, consi!ieration of all of the f,llowing:
(1) Prevailing speeds as determined Py traffic engineering measurements.
(2) Accident records.
(3) Highway, traffic, and roadside cqnditions not readily apparent to the driver.
Guidance: .
The Engineering and Traffic Survey shoul~ contain sufficient information to document that the required
three items of eve Section 627 are provided a(nd that other conditions not readily apparent to a motorist are
properly identified.
Prevailing speeds are determined by a spe~d zone survey. A speed zone survey should include:
. The intent of the speed measurements Is to determine the actual speed of unimpeded traffic. The
speed of traffic should not be altered b~ concentrated law enforcement, or other means, just prior to,
or while taking the speed measurements.
. Only one person is required for the field work. Speeds should be read directly from a radar or other
electronic speed measuring devices; OI'p
. Devices, other than radar, capable of a~curately distinguishing and measuring the unimpeded speed
of free flowing vehicles may be used.
. A location should be selected where p*vailing speeds are representative of the entire speed zone
section. If speeds vary on a given rout~, more than one speed zone section may be required, with
separate measurements for each sectio*. Locations for measurements should be chosen so as to
min;m;'e the effects of traffic signals clr stop signs.
. Speed measurements should be taken 4uring off-peak hours between peak traffic periods on
weekdays. If there is difficulty in obtaining the desired quantity, speed measurements may be taken
during any period with free flowing tr'lffic.
. The weather should be fair (dry pavement) with no unusual conditions prevailing.
. The surveyor and equipment should n9t affect the traffic speeds. For this reason, an unmarked car is
recommended, and the radar speed meter located as inconspicuously as possible.
. in order for the sample to be represent!.tive of the actual traffic flow, the minimum sample should be
100 vehicles in each survey. In no cas~ should the sample contain less than 50 vehicles.
. Short speed zones ofless than 0.8 km ~0.5 mil should be avoided, except in transition areas.
. Speed zone changes should be coordinp.ted with changes in roadway conditions or roadside
development.
. The speed limit should be established ~t the nearest 10 km/h (5 mph) increment to the 85th percentile
speed. However, in matching existing ~onditions with the traffic safety needs of the community,
engineering judgement may indicate t1je need for a further reduction of 10 km/h (5 mph).
May 20, 2004
3-16
MUTCD 2003 California Supplement
Page 2B-52
. Speed zoning should be in 20 km/h (10 ,*ph) increments except in urban areas where 10 km/h (5
mph) increments are prefetable.
. Speed zoning should be coordinated witIi adjacent jurisdictions.
Support:
Physical conditions such as width, curvature,! grade and surface conditions, or any other condition readily
apparent to the driver, in the absence of other fac~ors, would not require special downward speed zoning.
Refer to CVC 22358.5. .
Option:
When qualifying an appropriate speed limit, $tate and local authorities may also consider the following
findings:
I. Residential density, if any of the followUj.g conditions exist on the particular portion of highway and
the property contiguous thereto, other thaln a business district:
a. Upon one side of the highway, wilhi1/. 0.4 km (0.25 mil, the contiguous property fronting thereon
is occupied by 13 or more separate d-lvelling houses or business structures.
b. Upon both sides of the highway, coll~ctively, within a distance of 0.4 km (0.25 mil the
contiguous property fronting thereon lis occupied by 16 or more separate dwelling houses or
business structures. .
c. The portion of highway is larger than 0.4 km (0.25 mil but has the ratio of separate dwelling
houses or business structures to the I~ngth of the highway described in either subparagraph a or
b.
2. Pedestrian and bicyclist safety.
Option:
The following two methods of conducting en$ineering and traffic surveys may be used to establish speed
limits:
I. State Highways - The engineering andtra.$c survey for Slate highways is made under the direction of
the Department of Transportation's District Traffic Engineer. The data includes:
a. One copy of the Standard Speed Zon~ Survey Sheet (See Figure 2B-I03) showing:
. A north arrow
. Engineer's station or post mileag,
. Limits of the proposed zones .
. Appropriate notations showing l)fpe of roadside development, such as "scattered business,"
"solid residential," etc. Schools tdjacent to the highway are shown, but other buildings need
not be plotted unless they are a f4ctor in the speed reco=endation or the point of
termination of a speed zone.
. Collision rates for the zones involved
. Average daily traffic volume
. Location of traffic signals, signs Imd markings
. If the highway is divided, the ~ts ofzones for each direction of travel
. Plotted 85'" percentile and pace steeds at location taken showing speed profile
b. A report to the District Director that i1ncludes:
. The reason for the initiation of s*ed zone survey.
. Reco=endations and supportinll reasons.
. The enforcement jurisdictions in'i'olved and the reco=endations and opinions of those
officials.
. The stationing or reference post in kilometers (mileage) at the beginning and ending of each
proposed zone and any interme4te equations. Location ties must be given to readily
identifiable physical features.
2. City and County Through Highways, Arteriials, Collector Roads and Local Streets.
May 20, 2004
3-17
MUTCD 2003 California Supplement
Page 2B-53
a. The short method of speed zoning is based on the premise that a reasonable speed limit is one
that conforms to the actual behavior of the majority of motorists, and that by measuring
motorists' speeds, one will be abl~ to select a speed limit that is both reasonable and effective.
Other factors that need to be consldered include but are not limited to: the most recent two-year
collision record, roadway design $peed, safe stopping sigbt distance, superelevation, shoulder
conditions, profile conditions, int~rsection spacing and offsets, commercial driveway
characteristics, and pedestrian traffic in the roadway without sidewalks.
b. Detennination of Existing Speed ~imits - Figures 2"8-10S & 2B-I06 show samples of data sheets
which may be used to record spe~d observations. Specific types of vehicles may be ta1lied by
use ofletter symbols in appropri* squares.
In most situations, the short form for local streets and roads will be adequate; however, the procedure
used on State highways may be used at the olition of the local agency.
Guidance:
Tbe factors justifying a reduction below tj1e 8Sth percentile speed for the posted speed limit are the same
factors mentioned above. Whenever such factors are considered to establisb the speed limit, they should be
documented on the speed zone surveyor the ~ccompanying engineering report.
The establishment ofa speed limit of mote than 10 kmIh (S mph) below the 8Sth percentile speed should
be done with great care as studies bave showti that establishing a speed limit at less than the 8Sth percentile
generally results in an increase in accident rat~s; in addition, this may make violators of a disproportionate
number of the reasonable majority of drivers.
Support:
Generally, the most decisive evidence of conditions not apparent to the motorist surface in accident
histories.
Speed limits are established at or near thel 8Sth percentile speed, which is defined as that speed at or
below which 8Sth percent of the traffic is moving. The 8Sth percentile speed is often referred to as the critical
speed. Pace speed is defined as the 16 kmIh ~IO mph) increment of speed containing the largest number" of
vehicles (See Figure 2B-l04). The lower ~t of the pace is plotted on the Speed Zone Survey Sheets as an
aid in determining the proper zone limits. Speed limits higber than the 8Sth percentile are not generally
considered reasonable and prudent. Speed lin\its below the 85'h percentile do not ordinarily facilitate the
orderly movement of traffic and require cons$nt enforcement to maintain compliance. Speed limits
established on the basis of the 8Sth percentile conform to the consensus of those who drive highways as to
what speed is reasonable and prudent, and ar~ not dependent on the judgement of one or a few individuals.
The majority of drivers comply with the ~asic speed law. Speed limits set at or near the 85th percentile
speed provide law enforcement officers with ~ limit to cite drivers who will not conform to what the majority
considers reasonable and prudent. Further stu!lies show that establishing a speed limit at less than the 8Sth
percentile (Critical Speed) generally results ul an increase in accident rates.
Option:
When roadside development results in tr~c conflicts and unusual conditions which are not readily
apparent to drivers, as indicated in collision r~cords, speed limits somewhat below the 85th percentile may be
justified. Concurrence and support of enforcelnent officials are necessary for the successful operation of a
restricted speed zone.
Guidance:
Speed zones ofless than 0.8 km (0.5 mil ~d short transition zones should be avoided.
Speed Traps
Support:
Refer to eve 40802 for Speed Traps.
Standard: ,
A speed trap shall not apply to a local $treet, road, or school zone.
May 20, 2004
3-18
MUTCD 2003 California Supplement
Page 2B-54
A section of highway shaIl be defined as a ~peed trap if the prima facie speed limit is not justified
by an engineering and traffic survey within fi~e years, and the enforcement of the speed limit involves
the nse of radar or any other electronic devicelthat measnres the speed of moving objects.
This time provision shaIl be extended to selven years when using radar and all of the following
criteria are met: -
. The arresting officer has successfully ~ompleted a minimum of 24 hours of certified radar
operator conrse training.
. The radar used to measure the speed I1'eets or exceeds the minimal operational standards of
the National Traffic Highway Safety A!dministration, and has been calibrated within three
years of the alleged violation.
This time provision shall be extended to seiven years when using laser or other electronic device
(other than radar) and all of the following crit~ria are met:
. The arresting officer has successfully ~mpleted a minimnm of 24 hours of certified radar
operator course training.
. The arresting officer has successfnUy cOmpleted a minimum of 2 hours of additional approved
certified training.
. The radar used to measure the speed oileets or exceeds the minimal operational standards of
the National Traffic Highway Safety A~istration, and has been calibrated within three
years of the alleged violation.
Option:
This time provision for an engineering and trilffic survey may be extended to ten years when all of the
above conditions are met and no significant chantes in roadway or traffic conditions have occurred,
including changes in adj~ining property or land t$e, roadway width, or traffic volume as determined by a
registered engineer.
Truck Sneed Zone on Descendinl! Grades
Guidance:
Highway descending grades, if used for postihg TRUCK SPEED LIMIT signs for trucks travelling
downhill, should have recorded incident history qfrunaway co=ercial vehicles. Descending grades shorter
than 1.6 Ian (I mil should be avoided forposting,signs because deceleration of vehicles due to braking action
can generally provide sufficient control on descCJitding grades ofless than 1.6 Ian (I mi).
Support:
To establish a downhill truck speed limit, a pp.ysical profile showing length and gradient and a downhill
speed profile for three or more axle co=ercial ,!ehicles with a gross rating of 4,536 kg (10,000 Ibs.) or
more will be provided.
Standard:
Speed profIles for truck speed limits shaIl \Je prepared on the same form as other speed surveys.
An analysis of collisions involving trucks shalllbe prepared.
Guidance: '
Posted speeds should be on the low side of tJie scale, generally within the pace ofloaded co=ercial
vehicles.
Standard:
If warranted, the Department of TranspOlltation's District Director shaIl issue a standard speed
zone order.
Support:
Posting of the regulation will be by placemCIjt of a standard 900 x 1150 = (36 x 45 in) Speed Limit
(R2-I) sign with a TRUCK (M4-4) plate above.
Standard:
A standard End Speed Limit (CA Code R4) sign with TRUCK (M4-4) plate shall be posted at the
end of the truck zone when appropriate.
May 20, 2004
3-19
ORDINANfE NO.
ORDINANCE OF TH~ CITY COUNCIL OF THE CITY
OF CHULA VISTA! ESTABLISHING THE SPEED
LIMIT ON FIRST AVENUE BETWEEN PALOMAR
STREET AND QUlN1!ARD STREET AT 25 MPH
WHEREAS, based on the provilsions of the California Vehicle Code and pursuant
to authority under the Chula Vista Municipal Code, the City Engineer has deternlined that
the speed limit on First Avenue betw~en Palomar Street and Quintard Street to be 25
mph; and
WHEREAS, the prevailing I speeds, accident history, roadway design
characteristics and land use justify a 25,mph posted speed limit; and
WHEREAS, the Engineering ~nd Traffic Survey was prepared pursuant to all
provisions of the California Vehicle Code and the Manual on Uniform Traffic Control
Devices; and
WHEREAS, the Safety Comll1ission concurs with staff's recommendation to
establish the speed limit on First A vedue between Palomar Street and Quintard Street at
25 mph; and '
WHEREAS, this recommendat!ion and other information in the City Engineer's
report has been fully considered by the lCity Council.
NOW, THEREFORE, the Citl!' Council of the City of Chula Vista ordains as
follows:
SECTION 1: That the speed limit on first Avenue between Palomar Street and Quintard
Street is established at 25 mph.
SECTION [[I That Schedule X of a! Register of Schedules maintained by the City
Engineer as provided in Section I ~.48.020 of the Chula Vista Municipal Code,
"Established Speed Limits in Certai'l Zones-Designated," is amended to include the
following infonnation:
Chula Vista Municipial Code Section 10.48.020 - Schedule X
Established Speed Limits in Certain Zones
Name of Street Beginning At Ending At Proposed Speed Limit
First A venue Palomar Street Quintard Street 25 mph
3-20
SECTION [II: This ordinance shall ta~e effect and be in full force on the thirtieth day
from and after its adoption.
Presented by
Approved as to form by
~LZ
Ar;~~
Scott Tulloch
City Engineer
Ann Moore
City Attorney
1-1:\[NCiINEER\Onlillallc~s\OnJ2()()7\2-()()-()7\()rdinuncc~{rirst Ave} Speed Est Revised eC.doc
3-21
ORDINANCE NO.
ORDINANCE OF THE CITY COUNCIL OF THE CITY
OF CHULA VISTA ESTABLISHING THE SPEED
LIMIT ON FIRST AiVENUE BETWEEN QUINTARD
STREET AND SOUtHERN TERMINUS OF FIRST
AVENUE AT 25 MPH'
WHEREAS, based on the provisions of the California Vehicle Code and pursuant
to authority under the Chula Vista Municipal Code, the City Engineer has determined that
the speed limit on First Avenue between Quintard Street and Southern Tenninus of First
A venue to be 25 mph; and
WHEREAS, the prevailing speeds, accident history, roadway design
characteristics and land use justify a 25 imph posted speed limit; and
WHEREAS, the Engineering <lnd Traffic Survey was prepared pursuant to all
provisions of the California Vehicle Cbde and the Manual on Uniform Traffic Control
Devices; and
WHEREAS, the Safety Coml1j1ission concurs with staffs recommendation to
establish the speed limit on First Av~nue between Quintard Street and the Southern
Terminus of First Avenue at 25 mph; and
WHEREAS, this recommendatlon and other information in the City Engineer's
report has been fully considered by the City Council.
NOW, THEREFORE, the City Council of the City of Chula Vista ordains as
follows:
SECTION I: That the speed limit 011 First Avenue between Quintard Street and the
Southern Terminus of First A venue is ettablished at 25 mph.
SECTION ll: That Schedule X of a Register of Schedules maintained by the City
Engineer as provided in Section I q.48.020 of the Chula Vista Municipal Code,
"Established Speed Limits in Certain Zones-Designated." is amended to include the
following infonnation:
Chula Vista Municip~1 Code Section 10.48.020 - Schedule X
Established' $peed Limits in Certain Zones
Name of Street I Beginning At Ending At Proposed Speed Limit
First A venue I Quintard St~eet Southern Terminus 25 mph
3-22
SECTION III: This ordinance shall t4e effect and be in full force on the thirtieth day
from and after its adoption.
Presented by
Approved as to form by
Scott Tulloch
City Engineer
YL4' (),-/(:",",,,;h- -
Ann Moore
City Attomey
H:\EN(ilNEER\()nlinallccs\Ord2{)07\2-(J(l-fJ7\Ordinam:c_(!First Ave) Speed Est Revised eC.doc
3-23