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HomeMy WebLinkAbout1986-11-03; Traffic Safety Commission; ; Request for additional stop signs at intersection of Chestnut Avenue and Trieste Drive.CITY OF CARLSBAD TRAFFIC SAFETY COMMISSION COMMISSION REPORT OF: November 3, 1986 ITEM NO.D-2 LOCATION: Intersection of Chestnut Avenue and Trieste Drive INITIATED BY: Ms. Be Be Forry, 2405 Gary Circle, Carlsbad, CA BACKGROUND: Ms. Forry telephoned and requested that this intersection be made a four-way stop by installing stop signs on Chestnut Avenue. DATA: Chestnut Avenue serves as a collector street providing access to and from El Camino Real for the residential area east of El Camino Real located between Elm Avenue and Tamarack Avenue, Trieste Drive is a residential street intersecting Chestnut Avenue approximately D .10 mile east of El Camino Real. At this time, stop signs, stop bar and the word ''STOP" is installed on Trieste Drive at the intersection of Chestnut Avenue. When approaching Trieste Drive, either eastbound or westbound on Chestnut Avenue, a cross road ahead sign (W9) is in place together with an advisory speed sign of 20 miles per hour. Traffic volumes are attached and are found to be low at this intersection. During the past twelve (12) months there have been two (2) reported accidents, the latest accident due to brake failure (see attached collision diagram). The purpose of a stop sign is to assign right-of-way. An intersection begins to be considered for all way stop when the volumes on all legs of the intersection are approximately equal. Stop sign warrants (attached) are the basic policy that establishes the need for the stop sign. When the warrants are met, a stop sign may be recommended for instal- lation. Traffic research has shown that when stop signs are installed at an unwarranted location, the stop sign may lead to an increase in accidents. TRAFFIC SAFETY COMMISSION COMMISSION REPORT OF: November 3, 1986 Continued CONCLUSION: ITEM NO.D-2 None of the warrants for the installation of stop signs on Chestnut Avenue at the Trieste Drive intersection are met. RECOMMENDATION: The Traffic Safety Coordinating Committee the request for additional stop signs at denied. Staff was directed to continue intersection. NECESSARY COUNCIL ACTION: recommends that this location be to monitor this None required required for mended, if the request is denied. An ordinance will be Council action if the stop signs are recom- GU LU 0 l UN U I Ab KA ht, CITY OP CARLSBAD TRAFFIC ENGINEERING SECTION ' I NO. ACCIDENTS ~y TYPE TU,I I~ B'-1' l"'>S ":, I ~a,_ TOTAL ~ I ~~~ YEH. IIIIOVINQ AHEAD ( (( .. VEH. 8ACJCING UP ---.• PEOESTAl&N TRAIN c::::> PAAl([Q V(HICl..t D F'IXEO 01.ltCT 0 PAOP(l'TT O.&WAGE © INJURY ACCIO(KT • FATAL ~CCIDtNT ,.o,, 0.t..liUG I 11\ I V~-lNA-rt' 31 ~ --0-- .. ~~ OHLT ~- ~ 6u .. 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PEAK H0UR(S) PEAK FL0W(S) Speci a 1 condi ti ans or remarks'------.,-------------- dQI ---4-bl TRAFFIC COUNT TA SHEET TS# __ _ Street(s) Count Date 9:-/t-f¾ to 9--J?--f¾ Loe at ion: On • C-#E2TJ/VC- Time Peri ad ~1.3 ~ 0000-0100 I Lt 0100-0200 4- 0200-0300 s 0300-0400 0 0400-0500 -z... 0500-0600 ~ 0600-0700 ~ 0700-0800 4~ 0800-0900 IPO 0900-1000 ,?,v_ 1000-1100 '? \ 1100-1200 6>4 1200-1300 lift,,,? 1300-1400 \\0 1400-1500 J4t::, 1500-1600 \l,D 1600-1700 11'1 1700-1800 Z.47 1800-1900 }'"?Z- 1900-2000 IZ.~ ' 2000-2100 Jog 2100-2200 /(f'tJ 2200-2300 4-g 2300-2400 -z.z., T0TAL(S) /, 317 04\ PEAK H0UR(S) PEAK FL0W(S) 0a ta Reduction by MJ S> (btwn/at):7P/E"~:le: Day/Direction Date ~/g-84, (and) (!_,zp:z/,,u.# Special conditions or remarks: _________________ _ #21 === \) :e,r:::..e, TRAFFrc COUNT DATA SHEET TS# __ _ Street(s) Count Oateq-z.':7'-&to q_z,e:;,-{!,t,, Data Reduction by a9S, Date 9-7/n _ 50 Location: On c::~~ (btwn/at) r~.,,,.z:z;r (and) L ... ..-Y9'V('.cq/ Day/Direction Time Period ~,,,; 7"'~.., 0000-0100 8 0100-0200 L\- 0200-0300 -z_.. 0300-0400 I 0400-0500 3 0500-0600 7 0600-0700 q l 0700-0800 140 0800-0900 I Se:, 0900-1000 &3 1000-1100 37 1100-1200 '?'4 1200-1300 4Z.. 1300-1400 "?? 1400-1500 \OZ-- 1500-1600 4l 1600-1700 ('.b3 1700-1800 7Z 1800-1900 &O, 1900-2000 &,cq ' 2000-2100 39 2100-2200 ~I 2200-2300 13 2300-2400 r3 T0TAL(S) ?c:10 4Z7 PEAK H0UR(S) PEAK FL0W(S) Special conditions or remarks: _____________ ~-----4-p-r --::::::. I 3 l 3 :z_., POLICY: Rl The Rl sign. shall be used on public roads where a stop is required. Stop signs shall be erected on both the left and right side of one-way roadways which are 30 feet or more in width. Stop signs shall not be installed at signalized intersections. Conditions warranting STOP signs are: l. On the less important road at its intersection with a main road where application of the nor- mal right of way rule is unduly hazardow as evidenced by accidents swceptible of correc- tion by STOP signs. 2. On a county road or city street at its intersec- tions with a state highway. 3. At the intersection of two main highways. The highway traffic to be stopped depends on ap- proach speeds, volumes, and turning move- ments. • 4. On a street entering a legally established through highway or street. • 5. On a minor street where the safe approach speed to the intersection is less than 10 miles per hour. A STOP sign is not a "cure-all" and is not a substi- tute for other traffic control devices. Many times the need for a STOP sign can be eliminated if the sight distance is increased by removing obstructions. The installation of STOP signs at locations where they are unexpected or where approach speeds are high should be avoided if possible because they may increase accidents. However, if there is no alterna- tive to a STOP sign, then an advance Code Wl7 STOP AHEAD sign and appropriate pavement markings should be placed in coajunction with it. Publicity through the radio and press is highly de- sirable when .STOP signs are installed and especially when it is necessary to change their location. Any of the following conditions may warrant a four-way stop sign installation: 1. Where traffic signals are warranted and the need is urgent, the four-way stop is an interim measure that can be installed quickly to control traffic while arrangements are being made for the signal installation. 2. An accident problem, as indicated by five or more reported accidents of a type susceptible of correction by a four-way stop installation in a 12-month period. Types of accidents susceptible of correction include right angle and left turn collisions. 3. Minimum volume warrant: a. The total vehicular volume entering the in• tersection from all approaches must average at least 500 vehicles per hour for any eight hours of an average day, and b. The combined vehicular and pedestrian vol- ume from the minor street or highway must average at least 200 units per. hour for the same eight hours with an average delay to minor street vehicular traffic of at least 30 seconds per vehicle during the maximum hour. c. When the 85-percentile approach speed of the major street traffic exceeds 40 miles per hour, the minimum vehicular volume war- rant is 70 percent of the above requirements. A four-way stop sign installation is a useful traffic control measure when other available means of con-' trol are.not adequate. It should not be used unless the volume of traffic on the intersecting roads is about equal and is undesirable at low-volume intersections, When STOP signs are placed on all entering legs of an intersection, each STOP sign may be supple- mented by a separate plate mounted below it with the message "'3-WAY", 004-WAY", etc. The supple- mental plate shall have white letters on a red back- ground. The 18"x18" size is for use only on bicycle trails where bicyclists are required to stop. If the sign applies to motorists and bicyclists, the standard size stop sign shall be used. The bike l8"xl8" size has been added. The sign format has been changed to agree with the federal format Please note the minor change in border width for the 24", 30°0 , 36" and 48" sizes.