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HomeMy WebLinkAboutAGENDA REPORT 1996 0306 CC REG ITEM 07GAGENDA REPORT C = TY OF MOORPARK TO: The Honorable City Council FROM: Kenneth C. Gilbert, Director of Public Works DATE: February 26, 1996 (Council Meeting 3 -6 -96) 1 ej � � T ii—., 4 `i! /3� Y if C^��Cl7u CJ Iv, of SUBJECT: Consider Report Pertaining to the Establishment of a Three Way STOP at the Intersections of a) Laurelhurst Road and Rolling Knoll Road; and, b) Shadyridge Road and Mountain Trail Street In response to concerns raised about the possible need for the installation of additional STOP signs at the subject intersections to make them "three -way" stop intersections, the City Council directed the City Traffic Engineer to perform a Stop Sign Warrant Study at these two locations. On July 19, 1995, the City Council received and considered this Stop Sign Warrant Study. The study indicated that warrants had not been met which would justify the installation of additional STOP signs. In that this Warrant Study had been performed at a time when school was not in session, and on a date prior to the opening of Country Trail Park, the City Council directed that a new Stop Sign Warrant Study be performed at a later date when these conditions could be met. �=:V '17-IT-MMINY9177M � • As discussed above, the City has received requests from local residents for the placement of STOP signs at all three entrances to the subject intersections. lxlh•t9 Stop Signs March 6, 1996 Page 2 As previously discussed with the City Council, STOP signs are not meant to be used for speed control. The purpose of a STOP sign is to assist drivers entering an intersection in determining which driver has the right -of -way. Traffic engineering warrants are used to evaluate intersections and to determine if the installation of STOP signs at one or more entrance to the intersection is justify. None of those warrants pertain to vehicular speed. As mentioned above, Stop Sign Warrant studies were performed at the subject intersections last summer. Per City Council direction, follow -up Stop Sign Warrant Studies were recently performed at the subject locations. Those new studies area attached as Exhibit 1 and 2. The attached revised studies assessed traffic count data, accident history information and other relevant sources to determine if the installation of either single STOP or multiple STOP traffic controls at these intersections is needed. Those studies concluded that none of the warrants for a "three -way" STOP were met at either location. D. Traffic Safety As previously mentioned to the City Council, the installation of a STOP sign at an intersection does not always improve traffic safety. In many instances the addition of a STOP sign could render the intersection less safe than it was before. Unexpected STOP signs can lead to rear -end collisions. And STOP signs in low traffic area encourage drivers to violate "roll" the STOP sign which could lead to the creation of an unsafe condition. MM MM—NM, The Police Department concurs with the findings of the City Traffic Engineer and recommends that the subject intersections not be designated Three -way STOP intersections. 1r1h.t3 Stop Signs March 6, 1996 Page 3 r,- M Mr. Ray Ashton, who resides on Shadyridge Road, has been advised that the City Council would be considering this matter at its March 6, 1996, meeting. Mr. David Walsh has also been advised that this matter would be considered by the City Council on March 6, 1996. Mr. Walsh resides on and has corresponded to the City on behalf of many of his neighbors regarding traffic safety issues on Laurelhurst Road. 3� It is recommended that the City Council notrdesignate either of the subject intersections a three -way SWOP intersection. Irlhsq SENT BY :DWIGHT FRENCH & ASSOC.; 2 -23 -96 :12 :34PM :DWIGHT FRENCH & ASOC 805 529 8270:# 2/ 6 MEMORANDUM ,�,b..�- L TO: Ken Gilbert, Public Works Director DATE: February 23, 1996 CC: Dirk Lovett, Assistant City Engineer FROM: John Whitman, Traffic Engineer T"/ SUBJECT: Stop Sign Warrant Study - Intersection of Rolling Knoll Drive and Laurelhurst Road - Study was conducted during a period when school was in session. Charles Abbott Associates was engaged to perform a second stop sign warrant study for the intersection of Rolling Knoll Drive and Laurelhurst Road, with traffic counts to be collected while school was in session. This is a tee intersection with Rolling Knoll being a two (2) lane residential street. The street forms a loop. Rolling Knoll is north -south at the intersection with a median with one lane in each direction serving houses adjacent to its right of way. Laurelhurst provides land access and also serves some commuter traffic which cuts through the area. There is an adequate sight distance for all three approaches to the intersections. Residents in the area have complained about accidents caused by excessive speeds. The following documents the results of a warrant study to determine if stop sign(s) are warranted, using 24 hour traffic counts, which were collected on Tuesday, February 13, 1996: WARRANT MET For Single Stop Signs 1yes or no 1. On the less important road where application of the NO normal right -of -way rule is unduly hazardous -- (accident records show no accidents susceptible to correction by stop sign. Only two accidents are recorded in the area over the past three (3) years -- neither at intersection, neither connectable by stop sign). 2. City street intersection with state highway. NO 3. Intersection of two (2) main highways -- not met. NO 4. Street entering a legally established through street. NO 5. Minor street where the safe approach speed is less NO than 10 mph -- (safe approach speed on Rolling Knoll is 20 mph). 6. Unsignalized intersection in a signalized area -- (most NO intersections in the vicinity are unsignalized). FEB 23 '96 01:25 714 860 3476 PAGE.02 SENT BY:DWIGHT FRENCH & ASSOC.; 2 -23 -96 :12 :35PM :DWIGHT FRENCH & ASOC 805 529 8270;# 3/ 6 WARRANT MET (yes or 0-9 7. Combination of high speed, restricted view and accident NO record — (intersection has slightly higher speeds, views are somewhat restricted, and 0 accidents). For Mufti -Way StopSigns 1. Traffic signals are warranted and urgently needed, stop NO signs can be an interim measure — (Traffic signals are not warranted). 2. Five or more accidents in twelve (12) months of a type NO susceptible to correction by multi -way stop -- (No accidents during twelve (12) months). 3. Minimum traffic volumes a. Total vehicle volume entering intersection from NO all approaches must arrange 500 veh /hour for any eight (8) hour period — (the highest eight (8) hour period equals an average of 86 veh/hour for the period 1 pm to 9 pm). b. Combined vehicle and pedestrian volume from NO the minor street must average 200 units per hour for the same period ( total vehicles on Rolling Knoll for the eight (8) hours equals 285). Total pedestrians on Rolling Knoll estimated at 600. Average combined volume per hour equals 114 trips /hour for the period 1 pm to 9 pm. C. When 85 percentile approach speed on major street exceeds 40 mph, the minimum vehicular NO warrant is 70 percent of A and B. If the average speed on Laurelhurst is assumed to be above 40 mph and test is warranted. Average veh/hour for eight (8) hours — (highest eight hours of vehicles is 86 veh /hour), Based on this warrant study for stop signs at the intersection of Rolling Knoll Drive and Laurelhurst Road, neither single nor multiple stop signs continue to be warranted. Attachment: (1) Traffic counts — 24 hour lmemok028ro11n,a1d FEB 23 '96 01:25 ?14 960 34 ?6 PAGE.03 SENT BY :DWIGHT FRENCH & ASSOC.; 2 -23 -96 ;12 :35PM DWIGHT FRENCH & ASOC - 805 529 8270.# 4/ 6 SITE CODE : MOORPARK 24 HOUR MACHINE COUIITS -6Y TRAFFIC COUNTS PAGE: 1 N -S STREET: ROLLING KNOLL FILE: E9602044 E-N STREET: LAURELWAS7 ROAD CLIENT : DWIGHT FRENCH DATE: 2/13/96 ---------------------------------------------------------------------------------------------------------------------------------- TIME TOTAL BEGIN COUNTED NB SB ED 116 -------------------------•----------•---...--------------------------------------------------------------------------------------- 12:00 AM 5 0 1 2 2 12:15 6 0 3 3 0 12:30 0 0 0 0 0 12:45 0 0 0 0 0 NR TOTAL it 0 6 5 2 1 .-00 AM 2 0 0 1 1 1:15 5 0 3 2 0 A 1:30 1 0 1 0 0 Jil- 1.45 2 0 1 1 0 NR TOTAL 10 0 5 4 1 1� 2:00 AM 1 0 1 0 0 = 2:15 2 0 0 1 1 2:30 3 11 2 0 1 2:45 7 6 4 3 0 NR TOTAL 13 0 7 4 2 L I,C 4 LL- 14 uf4 S 7 -� 3:00 AM 2 0 1 1 0 3:15 0 0 0 0 0 3 :30 1 0 0 0 1 3:45 1 0 1 0 0 NR TOTAL 4 D 2 1 1 4:00 AM 4 0 1 2 1 6:15 1 0 0 1 0 4:30 0 0 0 0 0 4:45 2 O 0 2 D M Al g kONQ $ NR TOTAL 7 0 1 5 1 �_'.��_ _ 5:00 AM 4 0 0 4 0 M A X ALL = G q V 5:15 3 0 0 1 2 5:30 6 0 0 4 2 A v E-: pL� 5:45 5 0 0 2 3 HR TOTAL 1a 0 0 11 7 6:00 AM 9 0 2 6 1 M f 1 %K <a M I Aj = 3 0 9 6 6:15 9 O 1 a 0 6:30 12 0 0 11 1 A y r, 3 M .-lU : 3(b U�h 6:45 6 0 3 3 0 MR TOTAL 36 0 6 28 2 7:00 AM 10 O 1 7 2 7:15 14 0 0 10 4 7:30 19 0 0 13 6 7:45 16 0 4 11 3 MR TOTAL 61 O 5 41 15 000053 FEH 23 '96 01:25 714 860 3476 PAGE.04 SENT BY :DWIGHT FRENCH & ASSOC.; 2 -23 -96 .12 :35PM :DWIGHT FRENCH & ASOC 805 529 82704 5/ 6 SITE CODE : MOORPARK 24 HOUR MACHINE COUNTS-BY TRAFFIC COUNTS PAGE: 2 N -S STREET: ROLLING KNOLL FILE: E9602044 E-W STREET: LAURELHLIRST ROAD CLIENT : DWIGHT FRENCH DATE: 2/13/96 ----------------------------------------------------------------------------------------------------------------------------------- TIME TOTAL BEGIN COUNTED NB SB ED WB ................... --------------------------------------------------------------------------------------------------------------- e:oo AN 10 0 2 7 1 8:15 16 0 3 10 3 8:30 10 0 2 5 3 8:45 17 0 5 9 3 MR TOTAL 53 0 12 31 10 9:00 AM 9 U 1 6 2 9:15 7 0 2 5 0 9 :30 6 D O 2 4 9:45 7 D 2 3 2 HR TOTAL 29 0 5 16 8 10 :00 AM 13 0 3 9 1 10:15 14 0 5 5 1 10:30 14 0 5 6 3 10:45 14 0 3 9 2 MR TOTAL 55 0 16 32 7 11:00 AM 11 0 5 5 1 11:15 14 0 3 9 2 11:30 16 0 6 6 4 11:45 18 0 6 10 2 HR TOTAL 59 0 20 30 9 12:00 PM 14 0 6 7 1 12:15 9 0 6 1 2 , 12:30 14 0 6 6 2 12:45 12 0 5 4 3 MR TOTAL 49 0 23 18 a 1:00 PM 15 0 10 4 1 , 1:15 17 0 7 6 4 1:30 15 0 3 9 3 1:45 15 0 6 7 2 NR TOTAL 62 0 26 26 10 2:00 PM 14 0 7 6 1 2 :15 21 0 9 10 2 2130 26 0 14 6 6 2:45 14 0 3 9 2 MR TOTAL 75 a 33 31 11 3 :00 PM 25 0 12 10 3 3:15 13 0 4 5 4 3:30 23 0 a 9 6 3:45 31 0 11 8 12 MR TOTAL 92 0 35 32 25 FEB 23 '96 01:26 714 860 3476 PAGE.05 SENT BY :DWIGHT FRENCH & ASSOC.; 2 -23 -96 ;12 :36PM .DWIGHT FRENCH & ASOC 805 529 82704 6/ 6 SITE CODE : MOORPARK 24 HOUR MACHINE COUNTS -BY TRAFFIC COUNTS PAGE: 3 N-S STREET: ROLLING KNOLL FILE: E9602044 E-W STREET: LAURELHURST ROAD CLIENT : DWIGHT FRENCH ------------------------------------------------------------------------------------------- DATE! 2/13/96 --------------------------------------- TINE TOTAL BEGIN COUNTED NB SB EB WB ---------------------------------------------------------------------------------------------------------------------------------- 4:00 PH 21 0 9 11 1 4:15 19 0 8 7 4 4 :30 23 0 10 10 3 4:45 16 0 8 5 3 NR TOTAL 79 0 35 33 11 5:00 PN 27 0 13 8 6 $:15 27 0 14 10 3 5:30 26 0 13 11 2 SAS 28 0 14 9 5 MR TOTAL 108 0 54 38 16 6 :00 PM 31 0 19 10 2 6 :15 30 0 16 12 2 6 :30 39 0 15 15 9 6:45 28 0 11 13 4 NR TOTAL 128 0 61 50 17 7:00 PM 17 0 8 6 3 7:15 23 0 9 11 3 7:30 17 0 12 2 3 7 :45 19 0 4 9 6 MR TOTAL 76 0 33 28 15 8:00 PM 15 0 6 7 2 8.15 19 0 9 9 1 8:30 15 0 10 4 1 8:45 15 0 7 4 4 MR TOTAL 64 0 32 24 8 9:00 PM 6 0 2 4 0 9:15 14 0 9 4 1 9!30 7 0 3 2 2 9:45 10 D 6 3 1 HR TOTAL 37 0 20 13 4 10!00 PM 4 0 3 1 0 10:15 6 0 2 3 1 10:30 3 0 2 1 0 10:45 5 0 1 2 2 HR TOTAL 18 0 8 7 3 11:00 PM 0 0 0 0 0 11:15 5 0 3 1 1 11:30 4 0 1 1 2 11:45 2 0 2 0 0 HR TOTAL 11 0 6 2 3 DAY TOTAL 1155 0 449 510 196 OM05- FEB 23 '96 01:26 714 860 3476 PAGE.06 SENT BY:DWIGHT FRENCH & ASSOC.; 2 -23 -96 ;12 :41PM :DWIGHT FRENCH & ASOC MEMORANDUM 805 529 8270:# 2/ 6 11 1 41 TO: Ken Gilbert, Public Works Director DATE: February 23, 1996 CC: Dirk Lovett, Assistant City Engineer FROM: John Whitman, Traffic Engineer SUBJECT: Stop Sign Warrant Study - Intersection of Shadyridge Drive and Mountain Trail Street - Study conducted during a period when school was in session Charles Abbott Associates was engaged to perform a second stop sign warrant study for the intersection of Shadyridge Drive and Mountain Trail Street, with traffic counts to be collected while school was in session. This is a tee intersection with Mountain Trail Street being a collector loop running north -south at the intersection. Shadyridge Drive is a very short east -west street which serves a residential area under construction. There was a sight distance problem for Shadyridge traffic. The City has installed a stop sign and had the developer move a monument wall to improve sight distance. The sight distance is adequate after the improvements. The following documents the results of a stop sign warrant study using 24 hour traffic counts which werecollected on Tuesday, February 13, 1996: WARRANT For Single Stop Signs MET ayes or noj 1. On the less important road where application of the normal right-of-way rule is unduly hazardous — NO (accident records show no accidents susceptible to correction by stop sign). 2. City street intersection with state highway. NO 3. Intersection of two (2) main highways. NO 4. Street entering a legally established through street. NO 5. Minor street where the safe approach speed is less NO than 10 mph -- (safe approach speed on Shadyridge is less than 10 mph). 6. Unsignalized intersection in a signalized area. NO 7. Combination of high speed, restricted view and accident YES record -- (southbound Mountain Trail may have higher 5 - speeds due to steep grade, views are restricted, and no accidents). FEB 23 196 01:32 714 860 3476 PAGE.02 SENT BY :DWIGHT FRENCH & ASSOC.; 2 -23 -96 ;12:42PM :DWIGHT FRENCH & ASOC For Multi -Way Stop _Signs 1. Traffic signals are warranted and urgently needed, stop signs can be an interim measure. -- (Traffic signal are not warranted) 2. Five or more accidents in twelve (12) months of a type susceptible to correction by multi -way stop — (no accidents during twelve (12) months). 3. Minimum Traffic Volumes a. Total vehicle volume entering intersection from all approaches must arrange 500 veh/hour for any eight (8) hour period — (the highest eight (8) hour period equals an average of 70 vehicles /hour for the period 8 am to 4 pm). b. Combined vehicle and pedestrian volume from the minor street must average 200 units per hour for the same period -- (total vehicles on Shadyridge for the eight (8) hours equals 167. Total pedestrians on Shadyridge estimated at 500. Average combined volume per hour equals 84 trips /hour for the period 8 am to 4 pm). C. When 85 percentile approach speed on major street exceeds 40 mph, the minimum vehicular warrant is 70 percent of A and B. The average speed on Mountain Trail probably exceeds 70 mph therefore, test warranted. Average vehicles /hour for eight (8) hours -- (highest eight hours of vehicles is 68 vehicles /hour). 805 529 8270:# 3/ 6 WARRANT MET (yes or nol NO ILS GLD-7 m NO Based on this warrant study for stop signs, a single stop sign is warranted on Shadyridge Drive at its intersection with Mountain Trail Street. Multiple stop signs continue to be not warranted. Attachments Umemo%028mtntr.sW (1) Traffic counts -- 24 hour 0000. 17 FEB 23 '96 01:32 714 860 3476 PAGE.03 SENT BY:DWIGHT FRENCH & ASSOC.; 2 -23 -96 ;12:42PM ;DWIGHT FRENCH & ASOC 805 529 8270;# 4/ 6 SITE CODE : MOORPARK 24 HOUR MACHINE COUNTS -BY TRAFFIC COUNTS PAGE. 1 N-S STREET: MOUNTAIN TRAIL STREET FILE: E9602043 E-W STREET: SHADTRIDGE DRIVE CLIENT : DWIGHT FRENCH DATE: 2/13/96 .................................................................................................................................. TIME TOTAL BEGIN COUNTED NB SB EB WB ............................... ................................................................................................... 12:00 AN 0 0 0 O 0 12:15 0 0 0 0 0 12:30 1 0 1 0 0 12:45 2 1 0 1 0 OR TOTAL 3 1 1 1 0 1:00 AM 2 1 1 O 0 1:15 1 1 0 0 0 1:30 1 0 1 0 0 1:45 2 0 1 1 0 NR TOTAL 6 2 3 1 0 2:00 AN 2 2 0 0 0 2:15 0 0 O 0 0 2:30 0 0 0 0 0 2:45 0 0 0 0 0 HR TOTAL 2 2 0 0 0 -C 3:00 AN 2 0 0 2 0 io 3:15 0 0 O 0 0 SNA01QIpL� 3:30 2 0 2 O 0 r 3:45 2 1 0 1 0 NR TOTAL 6 1 2 3 0 4:00 AN 0 O 0 0 0 4:15 2 0 0 2 0 4 :30 5 4 1 0 0 4:45 3 1 0 2 0 NR TOTAL 10 5 1 4 0 5:00 AM 2 1 0 1 0 5:15 0 0 0 0 0 5:30 7 3 1 3 0 5:45 4 1 2 1 0 NR TOTAL 13 5 3 5 0 J ti q.v� �y 3 �h� M14�C t3 ) �1phr 5 6:00 AN 5 1 0 4 0 �"�� ALL S 6 6:15 7 4 1 2 0 $ 6:30 15 4 5 6 0 A �� 6:45 13 3 3 7 0 HR TOTAL 40 12 9 19 0 7:00 AN 14 T 3 4 0 )kA'A A$ 1.4 Z 0 0 V 7 :15 7:30 19 19 6 3 3 5 E 11 0 0 IF) = Z s v h 7:45 16 3 4 9 0 HR TOTAL 6e 21 15 32 0 PEP 23 '96 01:32 714 860 3476 PAGE.04 SENT BY:DWIGHT FRENCH & ASSOC.; 2 -23 -96 ;12 :43PM ;DWIGHT FRENCH & ASOC 805 529 8270:# 5/ 6 FEB 23 '96 01:33 714 860 3476 PAGE.05 24 HOUR MACHINE COUNTS -BT TRAFFIC COUNTS PAGE: 2 SITE CODE MOORPARK FILE: E9602043 N -S STREET: MOUNTAIN TRAIL STREET E-W STREET: SHADTRIDGE DRIVE DATE: 2/13/96 CLIENT : DWIGHT FRENCH ---------------------- -------------------------------------------------------------------------------------------- T1ME TOTAL SEGIN COUNTED N6 SB EB U9 -------------------------- 0:00 AM 1a 6 2 10 0 a:15 29 13 11 5 0 11:30 34 4 21 9 0 8.45 39 11 16 12 0 OR TOTAL 120 34 50 36 0 9 :00 AM 15 5 6 4 0 9:15 14 4 3 7 0 9:30 25 11 4 10 0 9:45 21 a 5 a 0 HR TOTAL 75 26 to 29 0 10:00 AM 6 1 4 3 0 10:15 13 5 4 4 0 10:30 18 10 2 6 0 10:45 12 7 3 2 0 HR TOTAL 51 23 13 15 0 11:00 AM 12 5 5 2 0 11 :15 a 2 3 3 0 11:30 13 4 3 6 0 11145 17 a 4 5 0 NR TOTAL 50 19 15 16 0 12:00 PH 12 4 4 4 0 12:15 14 2 4 5 0 , 12:30 11 4 5 2 0 12 :45 a 0 3 5 0 HR TOTAL 4S 10 16 19 e 1:00 PH 16 3 7 6 0 1:15 20 7 6 S 0 1:30 16 R 5 3 0 1:45 12 :1 2 7 0 MR TOTAL 64 41 22 21 0 2 :00 PN 17 6 4 7 0 2:15 19 4 5 10 0 2 :30 22 7 12 3 0 2:45 21 5 5 11 0 NR TOTAL 79 22 26 31 0 3:00 PM 14 2 9 3 0 1:15 22 6 14 2 0 3:30 18 4 e 6 0 3 :45 23 5 9 9 0 NR TOTAL T7 17 40 20 0 FEB 23 '96 01:33 714 860 3476 PAGE.05 SENT BY :DWIGHT FRENCH & ASSOC.; 2 -23 -96 ;12 :43PM :DWIGHT FRENCH & ASOC 805 529 8270,# 6/ 6 SITE CODE : MOORPARK 24 HOUR MACHINE COUNTS -BY TRAFFIC COUNTS PAGE: 3 FILE: EM2043 N -S STREET: MOUNTAIN TRAIL STREET E-W STREET: SHADYRIDGE DRIVE DATE: Z/13/96 CLIENT : DVIGHT FRENCH -------------------------------------------------------------------------------------------------------------- TIME 70TAL BEGIN COUNTED NB SB EB VB .............•------------------------...------......----------------------.....---------------------------------- 4:00 PH 22 6 9 7 0 4:15 15 1 6 a 0 4:30 9 0 5 4 0 4:45 11 2 7 2 0 HR TOTAL 57 9 27 21 0 5:00 PH 14 3 a 3 0 5.15 15 3 a 4 0 5:30 17 4 6 7 0 5:65 23 10 7 6 0 NR TOTAL 69 20 29 20 0 6 :00 PH 15 5 5 5 0 6:15 16 3 2 11 0 6:30 16 4 5 7 0 6:45 9 3 4 2 0 MR TOTAL 56 15 16 25 0 7:00 PH 16 9 5 2 0 7:15 10 1 5 4 0 7 :30 14 6 1 7 0 7:45 10 6 4 2 0 NR TOTAL 50 20 15 15 0 8:00 PH 3 1 1 1 0 5:15 a z 6 0 0 5:30 6 0 1 5 0 5.45 5 1 1 3 0 HR TOTAL 22 4 9 9 0 9:00 PM 6 2 2 2 0 9:15 5 2 3 0 0 9:30 4 2 2 0 0 9:45 4 1 1 2 0 HR TOTAL 19 7 a 4 0 10:00 PM 4 2 1 1 0 10:15 4 2 1 1 0 10 :30 5 3 2 0 0 10:45 1 0 1 0 0 NR TOTAL 14 7 5 2 0 11:00 PH 0 0 0 0 0 11:15 4 1 2 1 0 11:30 4 0 2 2 0 11:45 1 1 0 0 0 HR TOTAL 9 2 4 3 0 ---------------------------------------------------------------------------------------------------------------------------------- DAY TOTAL 1005 307 347 351 0 FEB 23 '96 01:33 ?14 860 34 ?6 PAGE.06