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Home My WebLink About1994-03-07; Traffic Safety Commission; ; Establish a prima facie speed limit on the subject segment of Tamarack Avenue.CI1Y OF CARLSBAD TRAFFIC SAFE1Y COMMISSION STAFF REPORT COMMISSION MEETING OF: March 7, 1994 ITEM NO. 6A LOCATION: Tamarack Avenue -Interstate Highway 5 to Skyline Road INITIATED BY: Carlsbad Police Department REQUESTED ACTION: Establish a prima facie speed limit on the subject segment of Tamarack Avenue. BACKGROUND: DATA: Staff has been asked to conduct an engineering and traffic survey on the subject segment of Tamarack Avenue to review the existing speed zone. The purpose of a speed zone is to establish a speed limit tha,t is reasonable and safe for a given portion of roadway. Tamarack Avenue is classified as a residential collector and has a varied roadway width from 44 feet to 76 feet. At the present time, the road is posted as a 25 mile per hour speed zone. The segment of road west of Adams Street has two lanes in each direction and the segment east of Adams has one lane in each direction. Left tum lanes are provided at some intersections. Bike lanes are provided on both sides of the street. Street lights, sidewalks and numerous driveways are also consistent throughout this segment. Parking is allowed on both sides of the roadway east of Adams Street. This portion of Tamarack Avenue has a curvilinear alignment with vertical grades ranging from 0.6% to 12.26%. Tamarack Avenue serves as access to freeway and residences, and is a main corridor to schools and churches in the vicinity. A painted school crosswalk exists on Tamarack Avenue at the Valley Street intersection. Recent 24 hour traffic volumes west of Adams Street indicate 7,649 vehicles travel eastbound and 7,119 vehicles travel westbound. Volumes decrease significantly east of Adams Street. In the last two years, there were seven speed- related accidents out of a total of 12 reported accidents. Staff has completed an engineering and traffic survey for the portion of Tamarack Avenue from Interstate Highway 5 to Skyline Road as required by the California Vehicle Code. The survey is attached and includes the speed survey data. Sections 22357 and 22358 of the California Vehicle Code authorizes local authorities to establish a prima facie speed limit on the basis of the results of an engineering and traffic survey. The engineering and traffic survey considers such factors as the number of collisions that have occurred on the road segment, roadway features, traffic volumes, bicycle volumes, pedestrian volumes, adjacent land uses, driveway locations, critical speed and conditions that may not be readily apparent to the driver. CI1Y OF CARLSBAD TRAFFIC SAFE'IY COMMISSION STAFF REPORT COMMISSION MEETING OF: March 7, 1994 ( continued) RECOMMENDATION: ITEM NO. 6A Based upon the attached engineering and traffic survey, and in accordance with the Caltrans Traffic Manual, the Traffic Safety Coordinating Committee recommends establishing a prima facie speed limit of 30 MPH upon Tamarack Avenue from Interstate Highway 5 to Skyline Road. NECESSARY CI1Y COUNCIL ACTION: An ordinance will be required to be adopted by the City Council to establish the prima fade speed limit as recommended. f.// AND p MAR l-..5 F. RffW,4 r [OCATION VAL I I !s! ,~ I I 16 ~ ~ ~ I I rs MA J> ' CJ r7 ::0 PROPOSED SPEED ZONE PROJECT NAME TAMARA CK AVENUE PROPOSED 30 MPH SPEED ZONE DRAWN BY: SCOTT EVANS, CARLSBAD ENGINEERING DEPT. EXHIBIT 1 CITY OF CARLSBAD ENu1NEERING AND TRAFFIC SUNv'EY STREET: __ T::...::a=m=a=r=a=c=k-'-A=v..;a.e __ n=ue ________________ _ DATE:_-=2/....,0 ..... 3/ ___ 9 ___ 4 ______ _ A. Prevalllng SReed Data: Date of Speed Survey Location of Speed Survey 85th Percentile 10 MPH Pace Percent In Pace Posted Speed Limit B. Accident Hlsto!Y: (1/01/92 to 12/31/93) Speed-Related Accidents Total Accidents Acc,/Million Veh. Miles C. Traffic Factors: Average Dally Traffic Traffic Controls Pedestrian/Bicycle Traffic Bicycle Lanes On-Street Parking Other D. Roactwai Factors: Street Classification Design Speed Length of Segment Roadway Width Number of Lanes Vertical Alignment Horizontal Alignment Sidewalks Driveways Street Lighting E. Ad!acent Land Uses: 7 12 1.48 Direction: Eastbound/Westbound 12/29/93 At Alder Avenue 34 MPH 28 to 38 MPH 94% 25 MPH Direction: Eastbound/Westbound 2/02/94 At Valley Street 32MPH 25 to 35 MPH 94% 25 MPH 14,200 -West of Adams Street on 2/01/94; 7,000 -East of Park Drive on 2/01/94 Stop Sign Control at Skyline/Park/Highland; Traffic Signals at 1-5 NB Ramps/Pio Pico/Adams Heavy Bicycle Lane on Each Side East of Adams Street Allowed on Both Sides Except West of Adams & East of Sunnyhill Truck Route & Bus Route; Bike Route per Circulation Element of the General Plan Residential Collector 30MPH 1.05 Mi. 44 to 76 Feet West of Adams -2 Lanes Each Direction; East of Adams -1 Lane Each Direction Roadway Grades Vary from 0.6% to 12.26% Curvilinear Sidewalk on Each Side Several Closely Spaced Driveways Street Lights on Each Side Schools, Residential, Commercial, Church, Freeway F. Remarks: This is a heavily travelled corridor for elementary, junior high, and high school pedestrians, bicycles, and vehicles as a route to school. This portion of Tamarack Avenue connects Interstate Highway 5 to El Camino Real, a prime arterial, and is also heavily used by commuters. The portion west of Adams Street Is used by commercial delivery vehicles. A school zone exists within this section and Includes a school crossing at Valley Street. West of Adams Street, eastbound travel lanes are reduced to one through lane and one right-turn only lane. G. Traffic Engineer's Recommendation (Explanation): This speed zone satisfies the conditions of Section 627 of the California Vehicle Code and has been prepared and evaluated in accordance with the CAL TRANS Traffic Manual with respect to design and prevailing speeds, accident history, pedestrian activity, driveway spacing, stopping sight distance, and roadway and traffic conditions. A speed limit posting of ~ MPH is found to be appropriate and justified. I"===~ ~=-- NOTE: Appropriate speed survey(s) is/are attached hereto and made a part hereof. CITY OF CARLSL. ~D SP_-=D SURVEY DATE: /2·29• ?3 TIME: /(J;()O to / t),· 1/S ~./'f, TOTAL VEHICLES : _ _._!-=-a-=-~--- WEATHER: __ ~G--=°'~~~D~------------CRITICAL SPEED:_~3~f __ MPH LOCATION: 7AMMAd( dl/E./,/llE @ dLPER AvE, PACE SPEED: MPH OBSERVER/RECORDER: ___ =JJ~W:;..;....;:,t;..,__ _______ _ CARS IN PACE: __ -1-t/-f,__ ___ % Posted Speed Li.mi t: PS MPH EB Direction of Travel Direction of Travel MPH II '7-II '7-; , "" • l MPH 16'i 65 64 64 63 63 62 62 61 61 60 60 59 59 58 58 57 57 56 56 55 55 54 54 53 53 52 52 51 51 50 50 49 49 48 48 47 47 46 46 45 45 44 44 43 43 42 42 41 41 40 40 39 IX I _:.,J j I JOO 39 38 ~ .2 '1 I./ 2 X IX 38 37 li I .. ~ -, J ' I./ ,2 X ~ 37 36) _) 3 1;;' ~ 3 (I 'I 36 35 l ..3 -7 ' H 'I XI~ A >. 35 34) I) ~ l h ~ /./ y 1 '/ 16 R X y X ){' IYl)I ~ _) 34 33 ) I) ""' IJ 6 ::) I -0 ~ 'l ,!!/} M l)C lA X y )( X I) I/ 1--' ) 33 32 ) ) I) 1..1 ,IC IX X ( fl 7 7 .t;"· I J(· i X X A J)(' ) li ,I X 32 31 ~ ,, )I lJ i) )( IA i'C:. -~ /..3 .'?7 Jc') ,i-X , ) )( )C 31 30'..'li ~ l ' ,0 (') 21/ I'./ 7 X I.V >C V.lt y )( 30 29 )I ~ i,I IX ' 8 C. ,., I' ( .2. X IX 29 28 Al,; ) I 3 b s ,''> }. u .2 X l.x 28 27 X 2 I :1 27 26 IX I .£::' I I 2 26 25 1/\ I E I I I 25 24 24 23 23 22 22 21 21 CITY OF CARLSc -1D DATE: _,,_;;;2=-· _-,2=----1.9 ..... f_ TIME: 3 : 3.!J-. to 4f;/(J f,M. TOTAL VEHICLES: __ ~_cJi_c/ __ _ WEATHER: __ ---l'9:~·-0~<J.~1/2'------------ LOCATION: Yrir1A6AUC 4 v«4'llE @ VALLeY .sr, OBSERVER/RECORDER: ___ ~Jl--~-~--------- CRITICAL SPEED: ___ 3 ___ ~=-_MPH PACE SPEED: _2,5 to 3_£ MPH CARS IN PACE: _____ f~f ____ % Posted Speed Limit: .2.S MPH \JIB EB Direction of Travel Direction of Travel MPH ff '7. r: II '7. • i 1 ~ ., l MPH 65 i65 64 164 63 63 62 62 §1 61 60 59 58 58 57 57 56 56 55 55 54 54 53 153 52 52 51 51 50 50 49 l49 48 48 47 47 46 46 45 45 44 44 43 43 42 42 41 41 40 40 39 39 38 38 37 ' JO,~ .2 1 X 37 36), I 2 J 36 35) X _;J 'I I ' 7 4/ ,2 .)C) 35 34 ,) ~ • if I I 1 • ➔ IX :.A./ 34 33 I) IX y ) /0 ' ,, ''O I I X X u, .,I 33 32 .) X X IX '? JO JO Pl i I X X c) ,I 32 31 1) I) • 7 7 7 ' y .) Ji 31 30 ) J )( X X X b ,c 'j' b V i > 'f ,)( X IA" i.X YI) IA.1 30 29 ) ,, ) ,I 1 12 ;., 'f). ' , /j X y iY ,x )(IJ X 1,)1 29 ,28 1) l.1 I) IX X IX I)\° I,-:; '3 -J ::J{:, ' :, ..;, :Y> I) y I.> 28 ,) )I I I) X K /2 IO 0 23 ,, ~ i,, 1.;c I)( 27 . -() ) I) IY fl R I .·-1 ,, ) IJ .)C X 26 25 'X I) ;_~ 'I ~) S' .5 "'' : I/ )(' y 25 24 24 23 23 22 22 21 21