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2017 Engineering & Traffic Survey 2021 Amendment - Adams St, Caleo Bay Dr, Avenue 52 (Oct 20)ATTACHMENT 1 W'wi LLDAN October 20, 2021 Mr. Bryan McKinney, P.E. City Engineer Public Works Department City of La Quinta 78-495 Calle Tampico La Quinta, CA 92253 Subject: 2017 Engineering and Traffic Survey 2021 Amendment Dear Mr. McKinney: As requested, Willdan has completed a review of the recommended speed zones on three segments in the City of La Quinta. The Engineering and Traffic Study dated January 5, 2017 is hereby amended to include the updated speed limits for these three segments listed below that supersede the previous speed limit recommendations. 2 — Adams Street — Fred Waring Drive to Miles Avenue 23 — Caleo Bay Drive — Avenue 47 to Avenue 48 61 — Avenue 52 — Avenida Bermudas to Desert Club Drive We are pleased to submit the enclosed recommendation and supporting documentation for the above segments. The Engineering and Traffic Survey for the above segments was conducted in accordance with applicable provisions of the CVC, following procedures outlined in the California Manual on Uniform Traffic Control Devices (California MUTCD) dated November 2014, and as required by Section 627 of the California Vehicle Code. The Report is intended to satisfy the requirements of Section 40802 of the CVC to enable the continued use of radar for traffic speed enforcement. We appreciate the opportunity to serve the City of La Quinta and the assistance and cooperation afforded to us during the course of this study. Very truly yours, WI LLDAN Jeffrey Lau, P.E., T.E. Traffic Engineer Enclosure QROfESS/ C. No. 83887 OIVIV OF cA\-\ 611, �o QR°FESSI pNq� No. 2835 1/N FG F OF cps\ Engineering and Planning 1 Energy Efficiency and Sustainability I Financial and Economic Consulting 1 National Preparedness and Interoperability 562.908.6200 1800.499.4484 1 fax: 562.695.2120 1 13191 Crossroads Parkway North, Suite 405, Industry, California 91746-3443 1 www.willdan.com 33 34 Table 1 Street Segments with Recommended Speed Changes No STREET FROM TO POSTED SPEEED LIMIT NEW POSTED SPEED LIMIT CHANGE 2 Adams Street Fred Waring Drive Miles Avenue 40 35 -5 23 Caleo Bay Drive Avenue 47 Avenue 48 30 25 -5 61 Avenue 52 Avenida Bermudas Desert Club Drive Not posted 35 Post limit Segment Table 2 Speed/ Collision Data Summary Table Dist. Dir. 85% Mi.% in ADT (Mi.) Speed Pace Pace Y iiiiiiik Accident Rate Exp. Act. Posted Prop. Speed Speed Remark Limit Limit Adams Street 23 1 Caleo Bay Drive Fred Waring Drive to Miles Avenue Avenue 47 to Avenue 48 0.50 N/S 42 33-42 82% 0.54 Avenue 52 Avenida Bermudas to Desert Club Drive 0.12 N/S 32 23-32 78% 8,353 1,914 E/W 38 30-39 81% 14,736 1.60 0.22 40 35 1.60 1.44 0.88 30 25 * 0.00 Not posted 35 CA MUTCD OPTION 2 Page 2 2021 Engineering and Traffic Survey City of La Quinta 35 36 SEGMENTS WITH SPECIAL CONDITIONS The following segments surveyed had recommended speed limits that were 5 miles per hour (mph) or more below the critical speed due to conditions not readily apparent to the driver. Each segment is discussed below. Segment #2 — Adams Street — Fred Waring Drive to Miles Avenue This segment is currently posted at 40 mph and has 1 through lane and a golf cart lane in each direction with an ADT of 8,353 vehicles per day. The adjacent land use is residential with a park, a fire station, and a church. The critical speed is 42 mph and would normally justify a 40 mph posted speed limit. However, due to midblock pedestrian crossings and limited visibility of emergency vehicles existing the fire station that may not be apparent to unfamiliar drivers, a lower speed limit is prudent. It is recommended that the speed limit be posted at 35 mph for the above reasons. Segment #23 — Caleo Bay Drive — Avenue 47 to Avenue 48 This segment is currently posted at 30 mph and has 1 through lane in each direction with an ADT of 1,914 vehicles per day. The adjacent land use is residential and commercial. The critical speed is 32 mph and would normally justify a 30 mph posted speed limit. However, due to limited sight distance, horizontal curves with hidden driveways, moderate bicycle traffic that shares the roadway, and midblock pedestrian crossings that may not be apparent to unfamiliar drivers, a lower speed limit is prudent. It is recommended that the speed limit be posted at 25 mph for the above reasons. Page 3 2021 Engineering and Traffic Survey City of La Quinta 37 CITY OF LA QUINTA ENGINEERING & TRAFFIC SURVEY STREET: Adams Street DATE: 4/20/21 between Fred Waring Drive and Miles Avenue TIME: 9:45a OBSERVER: Steve Libring LOCATION: 2 PART I: HIGHWAY & ROADWAY CHARACTERISTICS Sight Distance Obstructions? (yes or no) N/B S/B Notes 1. Horizontal No Yes Fire station 2. Vertical No No 3. Superelevation (%) None None 4. Shoulder Conditions (paved or unpaved) Paved Paved 5. Profile Conditions (grade,%) 6. Commercial Driveway Characteristics (at grade, dustpan, etc.) None Yes Fire station & church driveways on west side 7. Pedestrian Traffic in the Roadway without sidewalks (yes or no) No No Recent golf cart lanes added, peds cross mid -block 8. Adjacent Land Use (residential, commercial, office, etc) Residential, resort resort Church and Fire station on west side 9. Intersection Spacing and Offsets (spacing, feet -offsets, yes or no) No offsets Signals at Miles and at Fred Waring 10. Pavement Condition (good, satisfactory, poor) Good Good 11. Truck Traffic (heavy, moderate, light) Light Light 3 ton limit 12. Channelization (# of lanes, divided, undivided, painted, or raised median) 1 lane with a buffered bike/golf cart lane 1 lane with a buffered bike/golf cart lane Bike/golf cart lanes on both sides 13. Street Width and Alignment (width, feet — straight or curved) 32' 32' 64' total w/ 12' painted median 14. Street Length 0.5 mi 15. Average Daily Traffic 3,988 4,365 8,353 total Collected on 9/1/16 16. Traffic Flow Characteristics (heavy, moderate, Tight) Light Light 17. Uniformity with the Community (yes or no) Yes Yes 18. Heavy On -Street Parking Turnover (yes or no) No No No parking allowed on both sides 19. Street Lighting No No 38 CITY OF LA QUINTA ENGINEERING & TRAFFIC SURVEY STREET: Adams Street between Fred Waring Drive and Miles Avenue P LOCATION: 2 Direction Bi-directional 0 Northbound * 0 Eastbound * 0 Southbound * 0 Westbound * ►RT II: PREVAILING SPEED MEASUREMENT Location of Radar Measurement s/o La Palma Midblock 1 Date of Radar Measurement 4/20/21 Midblock Accident Rate (Acc/MVM) Expected-Statewide/Year Time of Radar Measurement (24 hour) 9:45 am to 10:25 am Actual 50%ile (mph) 85%ile (mph) 38 42 10 mph Pace (% of Vehicles) 33-42 (82%) Average Speed (mph) 38 Number of Samples Observed 111 Posted Limit (mph) 40 PART III: ACCIDENT RECORDS Time Period Evaluated 1/1/2018 TO 12/31/2020 Number of Accidents Midblock 1 Midblock Accident Rate (Acc/MVM) Expected-Statewide/Year 1.60 per MVM Actual 0.22 per MVM PART IV: ADDITIONAL REMARKS Conditions not Readily Apparent RECOMMENDED SPEED LIMIT 35 MPH * May be used in cases where two or more separate roadways are provided. CERTIFICATION: I, Jeffrey Lau, do hereby certify that this Engineering and Traffic Survey within the City of La Quinta was performed under my supervision and is accurate and complete. 1 am duly registered in the State of California as a Professional Engineer (Traffic). effrey Lau IO,I2o /2o2 Date TE 2835 State Registration Number 39 CITY OF LA QUINTA ENGINEERING & TRAFFIC SURVEY STREET: Caleo Bay Drive DATE: 3/23/21 between Avenue 47 TIME: 10:30a and Avenue 48 OBSERVER: Steve Libring LOCATION: 23 PART I: HIGHWAY & ROADWAY CHARACTERISTICS Sight Distance Obstructions? (yes or no) N/B S/B Notes 1. Horizontal Yes Yes 2. Vertical No No 3. Superelevation (%) None None 4. Shoulder Conditions (paved or unpaved) Paved Paved 5. Profile Conditions (grade,%) 6. Commercial Driveway Characteristics (at grade, dustpan, etc) None Yes Dustpan driveways on west side 7. Pedestrian Traffic in the Roadway without sidewalks (yes or no) No No Recent golf cart lanes added 8. Adjacent Land Use (residential, commercial, office, etc) Residential Commercial 9. Intersection Spacing and Offsets (spacing, feet -offsets, yes or no) No offsets Stop sign at Avenue 48 and at Avenue 47 10. Pavement Condition (good, satisfactory, poor) Good Good 11. Truck Traffic (heavy, moderate, light) Light Light 12. Channelization (# of lanes, divided, undivided, painted, or raised median) 1 lane with a bike/golf cart lane 1 lane with a bike/golf cart lane 13. Street Width and Alignment (width, feet — straight or curved) 20' 20' 40' total w/no LT lanes, curved 14. Street Length 0.54 mi 15. Average Daily Traffic 1,300 614 1,914 total Collected on 9/1/16 16. Traffic Flow Characteristics (heavy, moderate, light) Light Light 17. Uniformity with the Community (yes or no) Yes Yes 18. Heavy On -Street Parking Turnover (yes or no) No No No parking allowed on both sides 19. Street Lighting No No 40 CITY OF LA QUINTA ENGINEERING & TRAFFIC SURVEY STREET: Caleo Bay Drive between Avenue 47 P and Avenue 48 LOCATION: 23 Direction Bi-directional ❑Northbound * ❑ Eastbound * ❑ Southbound 0 Westbound * RT I1: PREVAILING SPEED MEASUREMENT Location of Radar Measurement n/o and s/o Lake La Quinta Midblock 1 Date of Radar Measurement 3/23/21 Midblock Accident Rate (Acc/MVM) Expected-Statewide/Year Time of Radar Measurement (24 hour) 10:30a to 11:15a Actual 50%ile (mph) 85%ile (mph) 28 32 10 mph Pace (% of Vehicles) 23-32 (78%) Average Speed (mph) 28 Number of Samples Observed 100 Posted Limit (mph) 30 PART III: ACCIDENT RECORDS Time Period Evaluated 1/1/2018 TO 12/31/2020 Number of Accidents Midblock 1 Midblock Accident Rate (Acc/MVM) Expected-Statewide/Year 1.60 per MVM Actual 0.88 per MVM PART IV: ADDITIONAL REMARKS Conditions Not Readily Apparent RECOMMENDED SPEED LIMIT 25 MPH * May be used in cases where two or more separate roadways are provided. CERTIFICATION: I, Jeffrey Lau, do hereby certify that this Engineering and Traffic Survey within the City of La Quinta was performed under my supervision and is accurate and complete. I am duly registered in the State of California as a Professional Engines raffic). la 21)/ jo2.1 TE 2835 Jeffrey Lau Date State Registration Number 41 CITY OF LA QUINTA ENGINEERING & TRAFFIC SURVEY STREET: Avenue 52 between Avenida Bermudas and Desert Club Drive LOCATION: 61 Direction Bi-directional 0 Northbound * 0 Eastbound * 0 Southbound * 0 Westbound * RT II: PREVAILING SPEED MEASUREMENT Location of Radar Measurement midblock Midblock 0 Date of Radar Measurement 10/4/21 Midblock Accident Rate (Acc/MVM) Expected-Statewide/Year Time of Radar Measurement (24 hour) 6:40 am to 7:15 am Actual 50%ile (mph) 85%ile (mph) 35 38 10 mph Pace (% of Vehicles) 30-39 (81%) Average Speed (mph) 35 Number of Samples Observed 100 Posted Limit (mph) Not posted PART III: ACCIDENT RECORDS Time Period Evaluated 1/1/2018 TO 12/31/2020 Number of Accidents Midblock 0 Midblock Accident Rate (Acc/MVM) Expected-Statewide/Year 1.44 per MVM Actual 0.00 per MVM PART IV: ADDITIONAL REMARKS California MUTCD Option 2 RECOMMENDED SPEED LIMIT 35 MPH * May be used in cases where two or more separate roadways are provided. CERTIFICATION: I, Jeffrey Lau, do hereby certify that this Engineering and Traffic Survey within the City of La Quinta was performed under my supervision and is accurate and complete. I am duly registered in the State of California as a Professional Engineer T . ffic). Io 20 / 2°2 TE2835 e rey Lau Date State Registration Number 42 CITY OF LA QUINTA ENGINEERING & TRAFFIC SURVEY STREET: Avenue 52 DATE: 10/4/21 between Avenida Bermudas TIME: 6:40a and Desert Club Drive OBSERVER: Steve Libring LOCATION: 61 PART I: HIGHWAY & ROADWAY CHARACTERISTICS Sight Distance Obstructions? (yes or no) W/B E/B Notes 1. Horizontal No No 2. Vertical No No 3. Superelevation (%) None None 4. Shoulder Conditions (paved or unpaved) Paved Paved 5. Profile Conditions (grade,%) 6. Commercial Driveway Characteristics (at grade, dustpan, etc) None None 7. Pedestrian Traffic in the Roadway without sidewalks (yes or no) No No Recent golf cart lanes added 8. Adjacent Land Use (residential, commercial, office, etc) Residential mixed w/ commercial Park/playground and Fire Station 9. Intersection Spacing and Offsets (spacing, feet -offsets, yes or no) No offsets Signals at Desert Club, roundabout at Avenida Bermudas 10. Pavement Condition (good, satisfactory, poor) Good Good 11. Truck Traffic (heavy, moderate, Tight) Light Light 12. Channelization (# of lanes, divided, undivided, painted, or raised median) 2 lanes merging to 1 lane with a bike/golf cart lane 2 lanes with a bike/golf cart lane Bike/golf cart lanes on both sides 13. Street Width and Alignment (width, feet — straight or curved) 32' 32' 76' total w/ 12' raised median 14. Street Length 0.12 mi 15. Average Daily Traffic 14,736 total Collected in 2014 16. Traffic Flow Characteristics (heavy, moderate, Tight) Moderate Moderate 17. Uniformity with the Community (yes or no) Yes Yes 18. Heavy On -Street Parking Turnover (yes or no) No No No parking allowed on both sides 19. Street Lighting No No 43 44 CITY OF LA QUINTA FOR ROADWAY: ADAMS STREET DATE: 04/20/21 DAY: Tuesday TIME PERIOD: 9:45 AM TO 10:25 AM SPEED (MPH) TOTAL VEHICLES SURVEYED NORTHBOUND+SOUTHBOUND 65 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 NB 0 0 SB TOTAL VEHICLES 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 X X 0 0 0 0 0 0 0 0 0 0 0 X X X 0 0 0 0 0 0 0 0 0 0 0 0 X X X X X 0 2 0 2 0 4 0 X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X 4 6 10 3 4 5 4 6 6 7 10 11 X X X X X X X X X X X X X X X X X X X 5 2 8 4 13 6 X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X 4 4 6 6 2 0 3 5 4 2 2 2 0 7 9 10 8 4 2 X X X 2 3 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 53 I 58 0 111 LIMITS (BTN): Fred Waring Drive to Miles Avenue OBSERVATION POINT: s/o La Palma POSTED SPEED LIMIT: COMMENTS: 40 MPH OBSERVER: LIBRING Playground 25 WEATHER: SUNNY MPH 6am - 10pm ROAD SURFACE: DRY pedestrians crossing midblock ROAD CONDITION: GOOD golf carts DATA COLLECTION METHOD: RADAR NORTHBOUND SOUTHBOUND NORTHBOUND+SOUTHBOUND 85TH %: 42 42 42 M.P.H. 50TH %: 38 38 38 M.P.H. 15TH %: 33 34 33 M.P.H. * ' 10 MPH PACE: 33 - 42 33 - 42 33 - 42 M.P.H. P % IN PACE: 81% 83% 82% A C % OVER PACE: 11% 7% 9% * E % UNDER PACE: 8% 10% 9% * ARITHMETIC MEAN: 38 38 38 M.P.H. SAMPLE VARIANCE: 26 17 21 STANDARD DEVIATION: 5 4 5 M.P.H. VARIANCE OF THE MEAN: 0.49 0.29 0.19 STD. ERROR OF THE MEAN: 0.70 0.54 0.44 M.P.H. \\irv-vdil-fs1\shares\redirection\NSpann\Downloads\RADAR FORM - Adams north of Miles 4-20-21 v1 45 CITY OF LA QUINTA DATE: 03/23/21 DAY: Tuesday TIME PERIOD: 10:30AM TO 11:15AM FOR ROADWAY: CALEO BAY DRIVE SPEED (MPH) TOTAL VEHICLES SURVEYED NORTHBOUND+SOUTHBOUND NB SB TOTAL VEHICLES 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 X 0 0 0 0 0 0 0 X 0 0 0 0 0 0 0 0 0 0 X 0 x 0 X X X X X X X X 0 0 0 2 3 3 6 X X 2 X X X X X 3 2 5 X X X X 2 2 4 X X X X X X X X 2 6 8 X X X X X X X X X X X X X 6 7 13 X X X X X X X X X X X X 8 4 12 X X X X X X X X X X X X X X 7 7 14 X X X X X 4 5 X X X X X X X 5 2 7 X X X X X 3 2 5 X X X X X 2 3 5 X X X 2 3 X X X 2 3 0 0 0 0 0 0 X 0 0 0 0 0 0 0 0 50 50 100 P A C E LIMITS (BTN): Avenue 47 and Avenue 48 OBSERVATION POINT: n/o and s/o Lake La Quinta POSTED SPEED LIMIT: 30 MPH OBSERVER: LIBRING COMMENTS: Conditions not WEATHER: SUNNY readily apparent include: ROAD SURFACE: DRY 1. limited sight distance ROAD CONDITION: GOOD 2. horizontal curves w/ driveways DATA COLLECTION METHOD: RADAR 3. bikes share the road 2 segments 4. midblock ped crossings NORTHBOUND SOUTHBOUND NORTHBOUND+SOUTHBOUND 85TH %: 32 32 32 M.P.H. 50TH %: 28 28 28 M.P.H. 15TH %: 24 24 24 M.P.H. 10 MPH PACE: 23 - 32 23 - 32 23 - 32 M.P.H. % IN PACE: 78% 78% 78% % OVER PACE: 14% 14% 14% % UNDER PACE: 8% 8% 8% ARITHMETIC MEAN: 28 28 28 M.P.H. SAMPLE VARIANCE: 23 17 20 STANDARD DEVIATION: 5 4 4 M.P.H. VARIANCE OF THE MEAN: 0.45 0.35 0.20 STD. ERROR OF THE MEAN: 0.67 0.59 0.45 M.P.H. I:\108162 - La Quinta TE Services\400-Traffic\E&T Amendment 2021\404-E&T Forms\RADAR FORM - Caleo Bay 46 CITY OF LA QUINTA FOR ROADWAY: AVENUE 52 SPEED (MPH) TOTAL VEHICLES SURVEYED EASTBOUND+WESTBOUND EB WB TOTAL VEHICLES 65 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 X 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 DATE: 10/04/21 DAY: Monday TIME PERIOD: 6:40AM TO 7:15AM LIMITS (BTN): Avenida Bermudas and Desert Club Drive OBSERVATION POINT: midblock POSTED SPEED LIMIT: not posted OBSERVER: LIBRING COMMENTS: 25 MPH from WEATHER: SUNNY 6am to lOpm playground ROAD SURFACE: DRY signal removed ROAD CONDITION: GOOD at Ave. Bermudas new roundabout DATA COLLECTION METHOD: RADAR 0 0 0 0 0 0 X X x 0 1 EASTBOUND WESTBOUND EASTBOUND+WESTBOUND X 1 0 2 X X X X X 3 2 5 X X X X X X X X X X X X X X 6 X X X X X X X X X X X 6 8 14 5 11 X X X X X X X X X X X X X X X X 5 4 4 4 9 8 X X X X X X X X X X X X 8 4 12 X X X 2 3 X X X X X X X X X X X X X X X 5 5 4 9 6 X X X X 4 0 4 X X 1 2 X X X X X X X X X 2 3 0 2 2 0 4 5 0 X X X 0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 P A C • E 85TH %: 38 38 38 M.P.H. 50TH %: 34 36 35 M.P.H. 15TH %: 30 29 30 M.P.H. 10 MPH PACE: 30 - 39 32 - 41 30 - 39 M.P.H. % IN PACE: 85% 78% 81% % OVER PACE: 2% 4% 5% % UNDER PACE: 13% 18% 14% ARITHMETIC MEAN: 34 35 34 M.P.H. SAMPLE VARIANCE: 15 24 19 STANDARD DEVIATION: 4 5 4 M.P.H. VARIANCE OF THE MEAN: 0.27 0.54 0.19 STD. ERROR OF THE MEAN: 0.52 0.74 0.44 M.P.H. 55 45 100 l:\108162 - La Quinta TE Services\400-Traffic\E&T Amendment 2021\404-E&T Forms\RADAR FORM - Ave. 52 west of Desert Club 47 48 LEGEND: SPEED LIMIT MPH 25 30 35 40 45 50 55 = CITY LIMITS Fit is -mg . is `r ` ?•• I I I r, 1 e_--�� DARBY ROAD IrAnfl 11 MI? ■ I .�' C.ili' tfi, 'NCC s*1 �I X11, Y l_q i ..,- ISI E_.., .� .� 1 N ,A • • l�.,II,• � �1�Vi1 w lI 1� i.1i=-moi w I E% i mil= _4 INF 71..Lriwzge �Iilll It 7Vq'T;MX ' 1114111111I ;, �IIIII It, -L 411111111111111E 4111111111111III€, W11111111111IIF'' \IIIIIIIIIII VIII 11111111111 111111 11111111r 11111 A11111111I 111P1 1 111111111111"111 :I 11111111111: VIII '111111111111 III' 1111111IIIII Ir 11111111111► IIIIIIIIP. CALLE TECATE CITY OF LA QUINTA SPEED LIMITS PREPARED OCTOBER 2021 AVENUE %AM Noi 1-1 Z N AVENU E 60 TE*y ill 0- W Z O 7 N.T.S. AVENUE 62 49 50