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Home My WebLink About2009-03-02; Traffic Safety Commission; ; Revise the prima facie speed limit upon Poinsettia Lane from Paseo del Norte to Cassia RoadC CITY OF CARLSBAD TRAFFIC SAFETY COMMISSION STAFF REPORT COMMISSION MEETING OF: March 2, 2009 LOCATION: INITIATED BY: Poinsettia Lane, Paseo de! Norte to Cassia Road City Engineer ITEM NO. 6A REQUESTED ACTION: Revise the prima facie speed limit upon Poinsettia Lane from Paseo de! Norte to Cassia Road. BACKGROUND: The subject segment of Poinsettia Lane is 1.90 miles in length and is a four lane major arterial that has critical speeds near or above 50 miles per hour (See Exhibit I for location). The currently posted speed limit of 45 miles per hour is not supported by the results of the latest Engineering and Traffic Survey. The 45 mile per hour prima facie speed limit upon Poinsettia Lane from Paseo de! Norte to Black Rail Road was approved by the City Council in December 1999. The 45 mile per hour prima facie speed limit on Poinsettia Lane from Black Rail Road to Cassia Road was approved by the City Council in September 2005. SETTING SPEED LIMITS: Optimal mobility is enhanced and overall traffic flow improved when drivers are operating their vehicles at a speed that is reasonable, comfortable, convenient, and safe under the existing conditions. It is generally acknowledged that the control of speed can be a significant factor in influencing and improving roadway safety by reducing the number of collisions. In fact, the premise of CVC section 22350, Basic Speed Law, is that no person shall drive upon a road at a speed greater than is reasonable and prudent taking into account weather, visibility, and traffic on the road and in no event at a speed that endangers the safety of others. Driver behavior is an extension of social attitudes and most drivers operate their vehicles in a reasonable manner. This is demonstrated by their good driving records. Therefore, traffic laws established on the basis of the behavior of the reasonable and prudent motorist are found to be the most successful. As a result, speed limits that are considered credible and enforceable will help enhance traffic safety and the operating efficiency on the roadway and achieve driver compliance. Roads in Carlsbad are designed in accordance with engineering standards to satisfy the goals of having a safe roadway, provide mobility, offer mode choices, and to enhance efficient traffic flow. One way that these goals are achieved is by establishing proper and reasonable speed limits that can be enforced. Speed limits that are reasonable can help to achieve voluntary compliance by the majority of drivers without need for the presence of a police officer. Laws and/or the establishment of speed zones that arbitrarily restrict travel by the majority of motorists can lead to wholesale violations of the posted speed limit. For a speed limit to be considered effective, drivers must believe that the posted speed limit is safe, properly established, and legally enforceable. C CITY OF CARLSBAD TRAFFIC SAFETY COMMISSION STAFF REPORT COMMISSION MEETING OF: March 2, 2009 ( continued) ITEM NO. 6A In the City of Carlsbad, the predominant practice for managing speed is by legally establishing a prima facie speed limit and then posting the speed limit upon the road with regulatory signs. A prima facie speed limit recognizes that conditions change throughout the day and there is no one safe speed for all the conditions that may be present upon the roadway. Police enforcement is used to target the most egregious violators of the speed limit. A fundamental tenet is that laws are enacted to protect the majority of the public by regulating the unsafe or unreasonable actions of the few. When law enforcement officers and the courts have confidence that speed limits have been set on a reasonable basis, their enforcement efforts are more effective. Nationally recognized vetted practices and guidance per standards and procedures in the Federal Highway Administration's national Manual on Uniform Traffic Control Devices 2003 Edition are considered when setting speed limits. In California, this manual is titled the California Manual on Uniform Traffic Control Devices. The most common method of establishing speed limits incorporates traffic engineering principles and other factors, such as using the results of a speed survey, into the Traffic and Engineering Survey. Prima facie speed limits are established by law when the City Council adopts an ordinance and the speed limit is posted on the roadway to indicate the maximum reasonable speed for a driver to operate a vehicle under ideal conditions in off-peak free flowing conditions. Among many factors, the three most persuasive arguments to consider when setting a realistic, or rational, speed limit are: 1. Critical speed (85 th percentile speed) 2. Collision history 3. Conditions that may not be readily apparent to the driver The premise implied in s~eed zoning is that the majority of drivers are operating their vehicles at or near the 851 percentile speed. Drivers that operate their vehicle at speeds higher than the 85th percentile speed should be the focus of the police. An important speed zoning concept is that the disparity in speed between vehicles on the road is reduced when prima facie speed limits are established at or near the 85th percentile speed and, as a result, safety is enhanced. In addition, a speed limit that is established based upon the 85 th percentile speed will increase driver respect for the speed limit sign. Only those regulatory or warning signs that have the respect of the roadway user will have a positive effect to control driver behavior traffic. C CITY OF CARLSBAD TRAFFIC SAFETY COMMISSION STAFF REPORT COMMISSION MEETING OF: March 2, 2009 ( continued) ITEM NO. 6A A comprehensive review of the collision history on a roadway is an important element in the process to establish a speed limit. In the collision analysis, factors such as collision frequency, type, severity, road conditions, road geometry, lighting conditions, and spatial distribution of the collisions are all considered. The review of collisions will also reveal if there is a high incidence of speed-related collisions on the road at specific locations. A number of collisions above the expected or normal threshold based upon Caltrans collision rates may be an indicator of a potential for reducing collisions. However, absent a significant collision history attributed to speed, it may be concluded that drivers are operating their vehicle in a reasonable and prudent manner at the speed they chose to drive. The installation of a speed limit sign will not automatically decrease accident rates nor increase roadway safety. Speed limits should not be lowered for conditions that are readily apparent to the driver and the speed limit signs are not used as intersection, curve or hazard warning devices. For the unusual conditions or conditions not readily apparent to motor vehicle operators, appropriate warning signs are installed. Design factors, including the geometric elements of the road, sight distance, or other factors such as adjacent land uses, parking, or pedestrian activity, may have a significant impact on the free flowing speed chosen by drivers. This driver chosen speed, in turn, is considered when establishing a prima facie speed limit. A number of factors may be considered when establishing a prima facie speed limit. The 2003 MUTCD lists such factors as: A. Road characteristics, shoulder condition, grade, alignment, and stopping sight distance; B. The pace speed; C. Roadside development and activity; and D. Reported crash experience for at least a 12-month period. Other factors are included, as appropriate, in the Engineering and Traffic Survey that becomes the basis for establishing the prima facie speed limit. Among the requirements to be considered are residential density and pedestrian and bicycle safety. Other factors include superelevations, profile conditions, intersection spacing and offsets, commercial driveways, and pedestrians in the roadway where sidewalks do not exist. C CITY OF CARLSBAD TRAFFIC SAFETY COMMISSION STAFF REPORT COMMISSION MEETING OF: March 2, 2009 ( continued) ITEM NO. 6A Basic speed Jaw as stipulated in the California Vehicle Code requires drivers to operate their vehicle at a speed that takes into account all roadway factors, environmental elements, adjacent land uses, and other traffic on the road. These are, in general, all readily apparent factors to the driver. Warning signs placed on the roadway can alert drivers to the presence of an unseen or unanticipated condition. As a result, drivers can operate their vehicle in a reasonable and prudent manner by adjusting speed for the condition that may be encountered. In summary, through the use of engineering, educational, and enforcement techniques, the management of vehicle speed is conducted. Voluntary public compliance with the posted speed limit is the goal when determining a realistic prima facie speed limit to post on a roadway. The realistic speed limit takes into consideration the normally competent and careful actions of a reasonable driver and provides for the regulation of unreasonable behavior by a few individuals. A posted speed limit should be readily accepted by drivers, be fair and reasonable, be related to risk on the roadway, be determined by the majority of drivers, and one that has a factual foundation. Posted speed limits reflect a balance of the various factors specific to the roadway. As a result, roadway safety can be improved and community concerns about traffic speed are appropriately and legally addressed. BASIS OF ACTION: The proposed speed limit for the road segment discussed in this report is regulated by section 22357(a) of the California Vehicle Code: "Whenever a local authority determines upon the basis of an engineering and traffic survey that a speed greater than 25 miles per hour would facilitate the orderly movement of vehicular traffic and would be reasonable and safe upon any street other than a state highway otherwise subject to a prima facie limit of 25 miles per hour, the local authority may by ordinance determine and declare a prima facie speed limit of 30, 35, 40, 45, 50, 55, or 60 miles per hour or a maximum speed limit of 65 miles per hour, whichever is found most appropriate to facilitate the orderly movement of traffic and is reasonable and safe. The declared prima facie or maximum speed limit shall be effective when appropriate signs giving notice thereof are erected upon the street and shall not thereafter be revised except upon the basis of an engineering and traffic survey. This section does not apply to any 25 mile per hour prima facie limit which is applicable when passing a school building or the grounds thereof or when passing a senior center or other facility primarily used by senior citizens." C CITY OF CARLSBAD TRAFFIC SAFETY COMMISSION STAFF REPORT COMMISSION MEETING OF: March 2, 2009 (continued) DATA: ITEMNO. 6A Beginning at Paseo del Norte and proceeding easterly, Poinsettia Lane has two traffic lanes in each direction (with several exceptions) separated by a raised median. The exceptions in the eastbound direction are short segments where striping is modified to one eastbound through lane and two right-tum only lanes approaching Aviara Parkway, one eastbound lane west of Brigantine Drive, and one westbound lane west of Cassia Road. After the short one lane segments, the road transitions to two lanes in each direction. The street is classified in the Circulation Element of the General Plan as a major arterial. Concrete curb and gutter is installed on both sides of the street except near Brigantine Drive. Concrete sidewalk is installed on both sides except on the south side near Brigantine Drive. Although there are numerous street lights constructed on both sides of the street, approximately 21 % of the portion of Poinsettia Lane east of A viara Parkway is without street lights. Driveways on a major arterial are discouraged whenever possible, however, four driveways intersect Poinsettia Lane. Vertical grades on Poinsettia Lane range from 0.40% to 7.0% and the street has a generally straight horizontal alignment. On-street parking prohibitions are established on both sides of Poinsettia Lane. Poinsettia Lane is controlled by traffic signals at seven intersections. The intersections include Paseo del Norte, Batiquitos Drive, Snapdragon Drive, Crystalline Drive, Aviara Parkway, Black Rail Road, and Ambrosia Lane. Several other intersecting streets are uncontrolled. Traffic counts were obtained on Poinsettia Lane as indicated in Table A. The directional distribution of traffic volumes also are provided in Table A. DATE 7/9/08 9/3/08 9/3/08 9/3/08 TABLE A 24-HOUR TRAFFIC VOLUMES POINSETTIA LANE LOCATION E/B East of Paseo del Norte 12,827 West of Aviara Parkway 9,434 East of A viara Parkway 4,675 East of Black Rail Road 4,214 24-HOURADT W/B TOTAL 11,856 24,683 8,900 18,334 4,605 9,280 3,957 8,171 There have been 14 reported collisions on Poinsettia Lane for the two-year period ending November 30, 2008. Of this total, 12 were speed related. The collision history supports CITY OF CARLSBAD TRAFFIC SAFETY COMMISSION STAFF REPORT COMMISSION MEETING OF: March 2, 2009 ITEMNO. 6A ( continued) the need for the Police Department to be able to use radar to enforce a posted speed limit that is justified by the results of an Engineering and Traffic Survey. A summary of the referenced collisions is presented on Exhibit 2. • Staff completed two Engineering and Traffic Surveys (attached) for Poinsettia Lane. The Surveys were obtained for the road segments located west and east of Aviara Parkway. Speed survey results contained within the Engineering and Traffic Survey are summarized in Table B. Four speed surveys were performed on two days in September 2008 at locations where prevailing the speeds are representative of driver behavior in the speed zone proposed for revision. TABLED SPEED SURVEY DATA FOR POINSETTIA LANE ··;-;_ :· .. . ··.·•: • ){Critical :Pace Survey. ·.-.·· ·:/?speed ·.speed 0/4 in ..·_,-; ... .. ., ... Date -Location ,_.:;.:", Direction •• {MPH) JMPID Pa-ce 9/18/08 0.1 mile w/o Snapdragon Drive EB/WB 48 40-50 78 9/18/08 t 50 feet w/o Crystalline Drive EB/WB 51 42-52 74 9/17/08 200 feet w/o Brigantine Drive EB/WB 52 43-53 76 9/17/08 I 00 feet w/o Fisherman Drive EB/WB 50 41-51 78 The pace speed is the I 0 mile per hour range of speeds that contain the highest number of observed vehicles. Generally, the critical speed is located in the upper range of the pace speed. Sections 22357 and 22358 of the California Vehicle Code authorize 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, adjacent land uses, driveway locations, traffic volumes, pedestrian volumes, critical speed, horizontal and vertical alignment, stopping sight distance, and conditions that may not be readily apparent to the driver. RECOMMENDATION: Based upon the results of the Engineering and Traffic Survey, the Traffic Safety Coordinating Committee recommends raising the prima facie speed limit upon Poinsettia Lane from 45 to 50 miles per hour from Paseo del Norte to Cassia Road. NECESSARY CITY COUNCIL ACTION: An ordinance will be required to be adopted by the City Council to establish the 50 mile per hour prima facie speed limit upon Poinsettia Lane, as recommended. C LOCATION NOT TO SCALE I 8NAPaoA I 'V1GONDR, I 0 MAP PROPOSED SPEED ZONE LEGEND: PROJECT NAME PROPOSED SPEED ZONE POINSETTIA LANE DRAllfo/ B~ SCOTT E'VANS, CARI.SIMD £NGINEE'RJNG IJEPT. 12 S C: TRAFFIC SPElD zaKS E'ED ZONE'-POINSE'T11A LANE.DIG @ TRAFRC SIGNAL EXHIBIT 1 Day of Date Time Week 3/1/07 Thursday 1819 8/5/07 Sunday 1023 10/31/07 Wednesday 1458 11/23/07 Friday 0924 12/18/07 Tuesday 0718 1/11/08 Friday 0728 1/21/08 Monday 1056 3/3/08 Monday 1553 4/12/08 Saturday 0900 C EXHIBIT 2 ·~ Midblock Traffic Collision Summary for Poinsettia Lane from Paseo Del Norte to Cassia Road (December 1, 2006 to November 30, 2008) Primary Collision Result Summary Factor P1 was traveling WB on Poinsettia Lane, lost control of IT PDQ V1. V1 collided with the curb of the center median and rolled over. P2 was stopped at a red light in the WB # 2 lane of ESS INJ Poinsettia Lane at Snapdragon Drive. P1 was WB in the# 2 Lane. P1 attempted to stop. V1 collided with the rearofV2. V2 was preparing to stop in the # 2 EB lane of ESS-INATT INJ Poinsettia Lane when V1 collided into the rear of V2. Prior to the traffic collision, D1 had been using a cell phone. V3 was stopped at a stop sign in the WB # 2 lane of Poinsettia Lane at Black Rail Road. V1 was diredly ESS-FTC PDQ behind V3 moving at approx. 15mph. V2 was diredly behind V1 moving at approx. 5-10mph. V1 struck the rear of V3 then V2 struck the rear of V1. V3 was stopped for a red light in the WB #2 lane of Poinsettia Lane. V2 was stopped behind V3. V1 was ESS INJ WB in the #2 lane. D1 looked to change lanes, when 01 looked forward V2 was stopped directly in front of V1. V1 struck the rear of V2 then was pushed into the rear ofV3. V1 (Motorcycle) was traveling EB on Poinsettia Lane.V1 attempted to slow prior to colliding with another EB ESS INJ vehicle in the # 1 lane and began to skid and lose control. V1 fell onto its right side colliding with the roadway.(EB traffic was slowed due to a traffic collision investigation along the south curb line.) V1 was traveling WB on Poinsettia Lane and struck a QTH PDQ loose water hole cover in the roadway which punctured V1 's right rear tire. P2 was stopped at a red light in the WB # 2 lane of ESS INJ Poinsettia Lane at Snapdragon Drive. P1 was traveling at a high rate of speed WB in the# 2 Lane. P1 attempted to stop. V1 collided with the rear of V2. V1 was traveling WB in the #2 lane and failed to stop ESS INJ and struck the rear of V2 which was stopped for a red light. V2 then was pushed into the rear of V3. Note: Time indicated in military time Location 315' e/o Crystalline Drive 30' e/o Snapdragon Drive 569' w/o Batiquitos Lane 1 0' e/o Black Rail Road 320' e/o Batiquitos Lane 135' e/o Batiquitos Lane 0.1 mi. e/o Aviara Parkway 80' elo Snapdragon Drive 210' e/o Paseo Del Norte Page 1 of 2 Day of Date Time Week 5/25/08 Sunday 1020 6/7/08 Saturday 1228 7/21/08 Monday 2034 9/25/08 Thursday 1826 11/11/08 Tuesday 1320 ,..... EXHIBIT 2 (cont.} ::, ir.dblock Traffic Collision Summary for Poinsettia Lane from Paseo Del Norte to Cassia Road (December 1, 2006 to November 30, 2008) Primary Collision Result Summary Factor V2 was stopped for a red light in the WB # 2 lane on ESS INJ Poinsettia Lane at Crystalline Drive. D1 applied the brakes and attempted to tum to avoid the collision. V1 struck the rear of V2. V2(Bike) was EB merging into the bike lane ESS INJ approaching Aviara Parkway on Poinsettia Lane. V1 was EB in the# 2 lane of Poinsettia Lane. V1 struck the rear ofV2. ESS-INATT V2 was stopped for a red light in the WB # 2 lane on H&R PDO Poinsettia Lane at Paseo Del Norte. V1 collided with the rear of V2. V1 fled the scene. V2 was stopped for a red light in the EB# 1 lane on ESS INJ Poinsettia Lane at Aviara Parkway. V1 was traveling EB in the # 1 lane. V1 attempted to stop but struck the rear ofV1. V2 was traveling EB in the# 1 lane of Poinsettia Lane. ESS-FTC-PDO V1 was traveling behind V2. V1 struck the rear of V2 H&R twice. V2 merged to the EB # 2 lane and V1 passed V2. V1 Fled the scene. Note: Time indicated in military time Legend PDO Property Damage Onlv INJ Injury IT Improper turning H&R Hit and run FTC Following too close INATT Inattention ESS Exceeding Safe Speed 0TH Other than Driver EB Eastbound WB Westbound V1 Vehicle one V2 Vehicle two V3 Vehicle three P1 Party one P2 Party two D1 Driver one Location 27' e/o Crystalline Drive 426' wlo Aviara Parkway 51' e/o Paseo Del Norte 250' e/o Crystralline Drive 0.1 mi. w/o Batiquitos Drive Page 2 of 2 C CITY OF CARLSBAD ENGINEERING AND TRAFFIC SURVEY STREET: Poinsettia Lane LIMITS: Paseo del Norte to Aviara Parkway FACTORS A. Prevailing S12eed Data: Direction: Eastbound/Westbound Direction: Eastbound/Westbound Date of Speed Survey 9/18/08 9/18/08 Location of Speed Survey 0.1 Mi. w/o Snapdragon Drive 150' w/o Crystalline Drive 85th Percentile 4BMPH 51 MPH 10 MPH Pace 40 to 50 MPH 42to 52 MPH Percent ln Pace 78% 74% Posted Soeed Limit 45MPH 45MPH B. Midblock Accident Histoty: (12/01/06 through 11/30/08} Speed-Related Accidents 11 (including one collision in construction zone} Total Accidents 12 Accidents/Million Vehicle Miles (MVM) 0.89 California Statewide Accidents/MVM 1.84 (2006 State Rate for 4 or More Divided Lanes} C. Traffic Factors: Average Daily Traffic 24,683-East of Paseo del Norte (7/09/08} 18,334-West of Aviara Parkway (9/03/08) Traffic Controls Traffic Signals at Paseo del Norte, Batiquitos Drive, Snapdragon Drive, Crystalline Drive, and Aviara Parkway. Pedestrian/Bicycle Traffic Light Bicycle Lanes Bicycle Lane on Each Side On-Street Parking Parking Prohibited on Each Side Other Bus Route; Bike Route per Circulation Element of the General Plan D. Roadwai Factors: Circulation Element Street Classification Major Arterial Length of Segment 0.86 Miles Roadway Width 82 Feet (Curb-to-Curb) Number of Lanes 2 Lanes Each Direction Vertical Alignment Roadway Grades Vary from 0.61% to 7.00% Horizontal Alignment Curvilinear Sidewalks Sidewalk on Each Side Driveways One Driveway Street LiQhting Street Liahts on Each Side E. Soecial Conditions: Travel lanes are separated bv a raised, landscaped median. F. Adiacent Land Uses: Fire Station, Single-Family and Multi-Family Residential. G. Remarks/Conditions Not Readili A1212arent: Two eastbound travel lanes are restriped at Aviara Parkway to include one through lane and two right-turn only lanes. H. 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 California Manual on Uniform Traffic Control Devices with respect to design and prevailing speeds, accident records, pedestrian and bicyclist safety, intersection and driveway spacing, and roadside and traffic conditions not readily apparent to the driver. A speed limit posting of 50 MPH is found to be appropriate and justified. I. Ap12rovals: □ Recertification of existing speed zone per Sections 22357, 22358 and 40802 of the California Vehicle Code. ~stablishment of new speed zone. • Approved i~~,-.~ City Engineer~ fr· t~/1,VDB r-• Date NOTE: Appropnate speed survey(s) 1s /are attached hereto and made a part hereof. DATE: 09/18/08 TIME: 2:35.PM TO WEA TH ER: Clear & Warm CITY OF CARLSBAD SPEED SURVEY 3:00 PM TOTAL VEHICLES: CRITICAL SPEED: LOCATION: Poinsettia Lane ~0.1 mi. w/o Snapdragon Drive VEHICLES IN PACE: OBSERVER/RECORDER: M. Rehfeldt ---------PACE SPEED(S): 45MPH POSTED SPEED LIMIT WESTBOUND DIRECTION OF TRAVEL MPH # % E # % %tile % # 65 64 63 62 61 60 59 58 57 56 55 54 53 52 X 51 X 50 X X X 49 X X X X 48 X X X X 47 X X X X X X 46 X X X X X 45 X X X X X X 44 X X X X X 43 X X X 42 X X X X X 41 40 X X 39 X X X X 38 X 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 1 2 t 1 100 1 2 1 1 99 3 6 5 5 98 4 2 4 8 7 7 93 6 3 4 8 7 7 86 6 3 6 12 11 11 79 10 5 5 10 9 9 68 8 4 6 12 11 11 59 10 5 5 10 7 7 48 4 2 3 6 6 6 41 6 3 5 10 10 10 35 10 5 4 4 25 8 4 2 4 6 6 21 8 4 4 8 5 5 15 2 1 1 2 5 5 10 8 4 4 4 5 8 4 1 1 1 2 1 Engineering Department Transportation Division 100 48 MPH _____ ...;....:.... ____ _ 78 % 40 TO 50 MPH --------- EASTBOUND DIRECTION OF TRAVEL MPH 65 64 63 62 61 60 59 58 57 56 55 54 53 52 51 X X 50 X X X 49 X X X 48 X X X X X 47 X X X X 46 X X X X X 45 X X 44 X X X 43 X X X X X 42 X X X X 41 X X X X 40 X 39 X X X X 38 X X X X 37 X 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 CITY OF CARLSBAD SPEED SURVEY DATE: 09/18/08 TIME: 2:00 PM TO 2:30 PM TOT AL VEHICLES: WEATHER: Clear & Warm CRITICAL SPEED: LOCATION: Poinsettia Lane -150' w/o Crystalline Drive VEHICLES IN PACE: OBSERVER/RECORDER: M. Rehfeldt ---------PACE SPEED(S): 45 MPH. POSTED SPEED LIMIT EASTBOUND DIRECTION OF TRAVEL MPH # % :E # % %tile % # 65 64 63 62 61 60 59 58 57 56 55 54 X X 53 X X X 52 X X 51 X X X 50 X X X X X 49 X X 48 X X X 47 X X X 46 X X X X X 45 X X 44 X X X X X 43 X X X 42 X X X 41 X X X 40 X X X X 39 X 38 X 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 2 4 2 2 10D 3 6 5 5 98 4 2 2 4 5 5 93 6 3 3 6 7 7 88 8 4 5 10 8 8 81 6 3 2 4 6 6 73 8 4 3 6 4 4 67 2 1 3 6 7 7 63 8 4 5 10 9 9 56 8 4 2 4 8 8 47 12 6 5 10 10 10 39 1D 5 3 6 7 7 29 8 4 3 6 8 8 22 10 5 3 6 4 4 14 2 1 4 8 5 5 10 2 1 1 2 3 3 5 4 2 1 2 2 2 2 2 1 Engineering Department Transportation Division 100 51 MPH _____ .,::_;_ ____ _ 74 % ----------- 42 TO 52 MPH --------- WESTBOUND DIRECTION OF TRAVEL MPH 65 64 63 62 61 60 59 58 57 56 55 54 X X 53 X X X 52 X X X X 51 X X X 50 X X X X 49 X 48 X X X X 47 X X X X 46 X X X X X X 45 X X X X X 44 X X X X 43 X X X X X 42 X 41 X 40 X X 39 X 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 CITY OF CARLSBAD ENGINEERING AND TRAFFIC SURVEY STREET: Poinsettia Lane LIMITS: Aviara Parkway to Cassia Road FACTORS A. Prevailing Seeed Data: Direction: Eastbound/Westbound Direction: Eastbound/Westbound Date of Speed Survey 9/17/08 9/17/08 Location of Speed Survey 100' w/o Fisherman Drive 200' w/o Brigantine Drive 85th Percentile 50MPH 52MPH 10 MPH Pace 41 to 51 MPH 43to 53 MPH Percent in Pace 78% 76% Posted Soeed Limit 45MPH 45MPH B. Midblock Accident Histont: (12/01/06 through 11/30/08) Speed-Related Accidents 1 Total Accidents 2 Accidents/Million Vehicle Miles (MVM) 0.30 California Statewide Accidents/MVM 1.84 (2006 State Rate for 4 or More Divided Lanes); 1.81 (2006 State Rate for 2 Lanes) C. Traffic Factors: Average Daily Traffic 9,280 -East of Aviara Parkway (9/03/08); 8,171 -East of Black Rail Road (9/03/08) Traffic Controls Traffic Signals at Aviara Parkway, Black Rail Road, and Ambrosia lane. Pedestrian/Bicycle Traffic light Bicycle Lanes Bicycle Lane on Each Side On-Street Parking Parking Prohibited on Each Side Other Bike Route per Circulation Element of the General Plan D. Roadway Factors: Circulation Element Street Classification Major Arterial Length of Segment 1.04 Miles Roadway Width 75 Feet in Unimproved Section; 82 Feet (Curb-to-Curb) Elsewhere Number of Lanes 2 Lanes Each Direction Vertical Alignment Roadway Grades Vary from 0.4% to 6.32% Horizontal Alignment Curvilinear Sidewalks Sidewalk on each side except 84D feet on south side adjacent to intersection at Brgantine Drive Driveways Three Driveways Street Liohtino Approximately 21% of Roadway Frontage is Without Street Lights E. Special Conditions: Eastbound travel lanes are reduced from two lanes to one lane beginning west of Brigantine Drive and reopen to two lanes west of Black Rail Road. Eastbound travel lanes are also reduced to one lane approaching Cassia Road where motorists must negotiate a 90 degree turn at the intersection. A curve warning sign including an advisory speed sign of 15 MPH have been posted to advise drivers of the 90 degree turn. Westbound travel lanes are reduced from two lanes to one lane beginning west of Black Rail Road and reopen to two lanes west of Brigantine Drive. Approximately 18% of the roadway frontage is unimoroved and a oortion of the sidewalk on the north side (1,155 feet) is asohalt. F. Adjacent Land Uses: Single-Family and Multi-Family Residential, Agricultural, Three Churches, Open Space, Community Park, Utility Easement WalkinQ Trail. G. Remarks/Conditions Not Readily Apparent: Police motorcycle officers utilize depressions at a midblock location in the raised median for U-turns. H. 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 California Manual on Uniform Traffic Control Devices with respect to design and prevailing speeds, accident records, pedestrian and bicyclist safety, intersection and driveway spacing, and roadside and traffic conditions not readily apparent to the driver. A speed limit posting of 50 MPH is found to be appropriate and justified. I. Approvals: □ Recertification of existing speed zone per Sections 22357, 22358 and 40802 of the California Vehicle Code. Btt:stablishment of new speed zone. Aoo.-1 K,,l,.._-y-\. f-""-r I z_/J (/ t) I!, City Engineer 1 IJ te NOTE: Appropriate speed survey(s) 1s /are attached hereto and made a part hereof. DATE: 09/17/08 TIME: 9:10 AM TO WEATHER: Clear & Cool ,-,a' CITY OF CARLSBAD SPEED SURVEY 10: 10 AM TOT AL VEHICLES: CRITICAL SPEED: LOCATION: Poinsettia Lane ~100' w/o Fisherman Drive VEHICLES IN PACE: OBSERVER/RECORDER: M. Rehfeldt ---------PACE SPEED(S): 45 MPH POSTED SPEED LIMIT EASTBOUND DIRECTION OF TRAVEL MPH # % l: # % %tile % # 65 64 63 62 61 60 59 58 57 56 55 54 53 52 X 51 X X 50 X 49 X X 48 X X X X 47 X X X X X 46 X X X 45 X X X X X X 44 X X X X 43 X X X X X X 42 X X X X X 41 X X X X 40 X X X 39 X X 38 X X 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 1 1 100 2 1 2 2 99 4 2 1 2 4 4 97 6 3 2 4 5 5 93 6 3 1 2 5 5 88 8 4 2 4 5 5 83 6 3 4 B 9 9 78 10 5 5 10 8 8 69 6 3 3 6 7 7 61 8 4 6 12 10 10 54 8 4 4 8 8 8 44 B 4 6 12 11 11 36 10 5 5 10 8 8 25 6 3 4 8 7 7 17 6 3 3 6 4 4 10 2 1 2 4 4 4 6 4 2 2 4 2 2 2 Engineering Department Transportation Division 100 50 MPH -------=------ 78 % ----------- 41 TO 51 MPH WESTBOUND DIRECTION OF TRAVEL MPH 65 64 63 62 61 60 59 58 57 56 55 X 54 X X 53 X X X 52 X X X 51 X X X X 50 X X X 49 X X X X X 48 X X X 47 X X X X 46 X X X X 45 X X X X 44 X X X X X 43 X X X 42 X X X 41 X 40 X X 39 3B 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 DATE: 09/17/08 TIME: 10:10 AM TO WEATHER: Clear & Warm CITY OF CARLSBAD SPEED SURVEY 10:55 AM TOT AL VEHICLES: CRITICAL SPEED: LOCATION: Poinsettia Lane -200' w/o Brigantine Drive VEHICLES IN PACE: OBSERVER/RECORDER: M. Rehfeldt ----'------PACE SPEED(S): 45MPH POSTED SPEED LIMIT EASTBOUND DIRECTION OF TRAVEL MPH # % I:# % %tile % # 65 64 63 62 61 60 59 58 57 56 55 X 54 X X 53 X X X X 52 X X X X X 51 X X X X X 50 X X X 49 X X X X 48 X X X X X 47 X X X 46 X 45 X X X 44 X X X 43 X X X X 42 X X 41 X X 40 X X 39 X 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 1 2 2 2 100 2 1 2 4 4 4 98 4 2 4 8 6 6 94 4 2 5 10 8 8 88 6 3 5 10 7 7 80 4 2 3 6 8 8 73 10 5 4 8 10 10 65 12 6 5 10 10 10 55 10 5 3 6 8 8 45 10 5 1 2 6 6 37 10 5 3 6 5 5 31 4 2 3 6 6 6 26 6 3 4 8 8 8 20 8 4 2 4 5 5 12 6 3 2 4 4 4 7 4 2 2 4 2 2 3 1 2 1 1 1 Engineering Department Transportation Division 100 52 MPH ----------- 76 % ----------- 43 TO 53 MPH WESTBOUND DIRECTION OF TRAVEL MPH 65 64 63 62 61 60 59 58 57 56 X 55 X X 54 X X 53 X X X 52 X X 51 X X X X X 50 X X X X X X 49 X X X X X 48 X X X X X 47 X X X X X 46 X X 45 X X X 44 X X X X 43 X X X 42 X X 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21