The URL can be used to link to this page

Home My WebLink About1986-10-06; Traffic Safety Commission; ; Request for traffic signals and stop sign for Anillo Way, La Gran Via and Madrilena Way'' j CITY OF CARLSBAD TRAFFIC SAFETY COMMISSION COMMISSION REPORT OF: October 6, 1986 ITEM NO.~ LOCATION: Anillo Way, La Gran Via and Madrilena Way INITIATED BY: Mr. Wilfred A. Levesque 7722 Anillo Way, Carlsbad, CA BACKGROUND: Mr. Levesque is requesting the following three (3) items be accomplished: 1. Convert Anillo Way, La Gran Via and Madrilena Way to a one-way street system to minimize traffic on the streets. 2. Install a traffic signal at the intersection of La Gran Via and Madrilena Way. 3. Stop sign and stop bar to be installed at the 90° turn from Anillo Way to La Gran Via (see sketch for street patterns). DATA: Anillo Way, La Gran Via and Madrilena Way streets located south of Levante Street. striping is indicated on the attached sketch. are residential Signing and One-way streets generally attract traffic from nearby parallel streets because of greater freedom of movement and reduction of conflicts at intersections. With a one-way street system, there is a potential for an increase in speeds and in traffic volumes. A one-way street system in this residential area would not be in the best interests of the neighborhood as a circuitous route of travel would be necessary on the one-way system to arrive at an individual I s home. TRAFFIC SAFETY COMMISSION COMMISSION REPORT OF: October 6, 1986 Continued ITEM NO.D-6 Traffic volumes and a collision diagram is attached, along with the warrants for a traffic signal. There have been two (2) reported accidents at the intersection of La Gran Via and Madrilena Way in the past twelve (12) months. This intersec- tion does not meet the warrants for the installation of a traffic signal. No accidents have been reported in the past twelve (12) months at the location of the• right angle turn from Anillo Way to La Gran Via. Signing and striping in place is shown on the attached sketch. Need for a stop sign at this location is not evident. A recent count showed a volume of 825 vehicles on Anillo Way north of Madrilena Way. RECOMMENDATION: The Traffic Safety Coordinating Committee recommends that the request be denied, based upon continued efficient traffic circulation, low traffic volumes anad a low accident history, and that none of the warrants for a traffic signal or a stop sign are met. NECESSARY COUNCIL ACTION: None required if the request is denied. An ordinance will be required for Council action if the stop sign is recommended. The City Council will need to approve the installation of the traffic signal. • ' C'::, ~ \ -d)cg * "';tl.J._ ,,('D>8'~ '? ~ '\ '\N ; A 9 -?<a"''"''-._<.,;, ~, --:;r.;,c:; O\'\j 0 ' . ' : ~-·:,_·. ~~~ ·-~,:•>• _ •• •. --<;", TRAFFIC COUNT . SHEET TS# __ _ Street(s) Count D~te¢ /(!,f!,C, to ¢. /fk·trz? Data Reduction by &,;J 7 Date o/ fa"/ ec::: Location: on· A.v///o (btwn/at) J'-fAt21?/J'i<V4•nd)LvL-1..<1 ('z: Day/Direction Time Period tu .,,..-,-;;e, -r?l/2e, 0000-0100 ('.p 0100-0200 3 0200-0300 Z- 0300-0400 -z. 0400-0500 0 0500-0600 -z_ 0600-0700 l 0700-0800 ~ 0800-0900 It, 0900-1000 -Z..t:7 1000-1100 14 1100-1200 I z_ 1200-1300 -Z.01 1300-1400 z..o 1400-1500 3Z... 1500-1600 z~ 1600-1700 ~7 1700-1800 '?'? 1800-1900 37 19oq-2000 "3t 2000-2100 /'I 2100-2200 /~ 2200-2300 II 2300-2400 9 TOTAL(S) --Z..d?~ /CJ?/J? PEAK HOUR(S) PEAK FLOW(S) Special conditions or remarks: ___________________ _ ADT -===-Lf 3 4: TRAFFIC COUNT L .. · SHEET TS#~-- Street(s) Count D<!.te %[2:g6to %-(~-£3~ Data Reduction by ~7 Date '"J-Je:J-$C. Location: On • 4»//4 (btwn/at) )#IIR(W, (.and) /v?H-(I?:: Day/Direction Time Period ~ --1!¼;: 0000-0100 '3 0100-0200 0 0200-0300 0 0300-0400 2- 0400-0500 1 0500-0600 ~ 0600-0700 I'-/ 0700-0800 '3t, 0800-0900 Z-7 0900-1000 Z-1 1000-1100 -Z."'? 1100-1200 Z.17 1200-1300 17 1300-1400 -z.Lf ' ' 1400-1500 \~ 1500-1600 "2,.0 1600-1700 137 1700-1800 "3'? 1800-1900 -z_t, 190~-2000 /I, 2000-2100 6 2100-2200 1 2200-2300 /1,, 2300,2400 LI TOTAL(S) /'17 -Z.Jl/ PEAK HOUR(S) PEAK FLOW( S ). Special conditions or remarks: __________________ _ .4lZC-3.~\ IJULLl01Ul1 UlAlll1Fri,, CITY Of CARLSBAD TRAFFIC ENGINEERING SECTION TU,I TOTAL I \ . ' YEH. MOVING AH£A0 ((( ► VEH. SAClll:ING UP ----.• PEDESTAi AH TRAIN ·c:> PARKEO VEHICL( □ F'IXED OIJECT 0 PROPERTY CA.MAGE ONLY ® INJURY ACCIDENT, • FAUL ~CClDE,-CT -'--"' ~ .. _,__ "''~ ~ N'-,...o..i;:_ v .._ 'v. ·-' -•, i>. v• ... h::..--.,1 01.A.WN t-1\1 '7 IT DA?I O..\i,1-ft NO. ACCIDENTS SY INJUIY ••r.u 0 0 i <:)" Ji! [ ·t -~ ~ 2 (S.\ l I ~ I (' - LEGE N.D HU,D•ON HEAD ·OH SIDESWIPE REAlt END OVEFITAKINQ SIOCSWIPI!'; RIGHT ANGLE A.-iPflOACH· TURN OVERTAKING TURN !)JT o, CONTROL VEHICLE TURNED OVEIII TYPE -,---r::=~-----,---,u100 ,-,-s...i. .-o <>.-\le>-6G,, llOM T OA.11:X WIT I \ - . , CONST 0f'O ov ES nc H80 H·A ILC IP IT IN4TT M/C .,. SFP VO VAW 0 0 ·.:1:rs~e, a:t'\....,,..,. V\ U\ol~~\-..:,..< vv,""C~ Roo.ot\ CONSTRUCTION ZONE ORIVEA ~TSIC"'L DEFECT DEFECTIVE VEHICLE. EXCESS SPEED FOLLOWING TOO CLOSE HAQ BEEN ORINIUNQ , HIT ANO H\JN . IMPROPER I.AN( CHANGE IMPROPER PASSINO IWPROPEft TURN IN4Ti'ENTIOH UQTORCYCLt 'RAN STCP SICN a• SlCN.61,, STOPPC.O a• 51,,QWING '°" P(Q(STRlAN v1sr81t.1TY OASTRU.:;:TEO -v1n1 .1Tr-n Qlt:.WT' -... TRAFFIC COUNT o;:-__ SHEET TS#~-- Street(s) Count Dateq../~,§? to 9--/¾@t, Location: On ·M 6u,u 1/4= Time Period ~ ~ 0000-0100 -z_ 0100-0200 1 0200-0300 3 0300-0400 0 0400-0500 --z_ 0500-0600 l 0600-0700 I I 0700-0800 17 0800-0900 . I& 0900-1000 -Z.°? 1000-1100 I~ 1100-1200 :z:w 1200-1300 ?~ 1300-1400 zo 1400-1500 ~\ 1500-1600 Jg 1600-1700 --=37 1700-1800 4-z 1800-1900 3Z. 1900-2000 J.13, ' 2000-2100 18 2100-2200 JI 2200-2300 7 2300-2400 7 TOTAL(S) /~7 ,~q PEAK HOUR(S) PEAK FLOW(S) Data Reduction by N,:J(z Date 9--Z.Z.-&;. (btwn/at) 1'-11/.?!0l.t.-;µ,Aand) 4.v~ /h 411. Day/Direction Special conditions or remarks: __________________ _ A17t' - I TRAFFIC COUNT o:, .. 1 SHEET TS# __ _ Street(s) Count Date:%/.&;:¾to 'tf-)~~ Location: On 4,,4 b,'i/YA/ )/4 Data Reduction by tn;;J& Date ~ZZ-,% (btwn/at) ~,4 (and) C,a~ 4:f,,J. Day/Direction Time Period ~ F"..---:. 0000-0100 ·?, 0100-0200 0 0200-0300 I 0300-0400 I 0400-0500 I 0500-0600 ""3 0600-0700 l~ 0700-0800 z_ \ 0800-0900 -z.o 0900-1000 Z.4 1000-1100 \ C\ 1100-1200 \? 1200-1300 14 1300-1400 -Z, "3, 1400-1500 30 1500-1600 23 1600-1700 2'.. \ 1700-1800 "2-2- 1800-1900 40 19oq-2000 \ \ 2000-2100 r3 2100-2200 at 2200-2300 6? 2300-2400 0 TOTAL(S) IL.}S, ld\t.. PEAK H0UR(S) PEAK H0W(S) Special conditions or remarks: __________________ _ A12,----::::=: 3.:::...\-1 TRAFFIC COUNT D,; _ _ SHEET TS# __ _ Street (s) Count Date <t.$:et. to 9--l9~fl::, Data Reduction by fy"-2 Date '1--Z.Z:-~ Location: On /;11412/1//..p:JJ//J (btwn/at) 4 W,4,U /A4 (and) 16-'zT"e:;.4 I'J Day/Direction Time Period ~17 ½e, 0000-0100 e,'? 0100-0200 0 0200-0300 0 0300-0400 0 0400-0500 :3 0500-0600 -z_ 0600-0700 ":3 0700-0800 93 0800-0900 7 0900-1000 &;, 1000-1100 g, 1100-1200 \0 1200-1300 s;. 1300-1400 4. 1400-1500 10 1500-1600 7 1600-1700 I? 1700-1800 ~ 1800-1900 7 1900-2000 G? • 2000-2100 -z,, 2100-2200 0 2200-2300 0 2300-2400 0 TOTAL(S) q.s U?{p PEAK HOUR(S) - PEAK FLOW(S) Speci a 1 conditions or remarks=-----,--,---------------- APT = /// Traffic Manual TRAFFIC SIGNALS AND LIGHTING 9-1 12-1979 CHAPTER 9 TRAFFIC SIGNALS AND LIGHTING ·Traffic Signals-Basic Information and Warrants 9-01 9-01.1 lntradudian Traffic signals are electrically powered traffic con- trol devices which alternately direct traffic to stop and proceed at highway and street intersections. Their purpose is the orderly assignment of right of way to the various traffic movements. When justified and properly designed, a traffic sig- nal installation may achieve one or more of the fol- lowing: l. Reduce the frequency of certain types of acci- dents; especially the right-angle type; 2. Effect orderly traffic movement; 3. By proper coordination, the continuous flow of a. platoon of traffic at a definite speed along a given route; 4. Allow other vehicles and pedestrians to cross a . heavy traffic stream; and 5. Control traffic more economically than by man- ual methods. Unjustified, ill-<iesigned, improperly-operated or poorly maintained traffic signals may cause: ' l. Increased accident frequency, 2. Excessive delay, 3. Disregard of signal indications, and 4. Circuitous travel by alternate routes. Con t~ary to common belief, traffic signals do not always increase safety and reduce delay. Experience shows that the number of right-angle collisions may decrease after the installation of signals, but the num- ber of rear-end collisions will increase in many in- stances. The installation of signals may increase over- all delay and reduce intersection capacity. Consequently, it is of the utmost importance that the consideration of a signal installation and the selection of equipment be preceded by a thorough study of traffic and roadway conditions made by an engineer experienced and trained in this field. Equally impor- tant is the need for checking the efficiency of a traffic si~al in operation. This determines the degree to which the type of installation and the timing pro- gram meets the requirements of traffic. 9-01.2 Warrant• The warrants for the installation of traffic signals are based on those stated in the Manual on Uniform Traffic Control Devices. These warrants apply to both pre-timed and traffic-actuated traffic signals. When the BS-percentile speed of major street traf- fic exceeds 40 miles per hour, or when the intersec- tion lies within the built-up area of an isolated com- munity having a population less than 10,000, the location is considered rural. All other' areas are con- sidered urban. Since the installation of traffic signals may increase certain types of collisions, the ·decision to install signals should not be based solely upon war- rants. Consideration should also be given to such fac- tors as delay, congestion, approach conditions, driver confusion and additional evidence of need for right of way assignment above that which could be pro- vided by stop signs. The installation of traffic signals should be consid- ered if one or more of the warrants listed below are met: Warrant 1-Minimum Vehicular Volume. Warrant 2-lnterruption of Continuous Traffic. Warrant 3-Minimum Pedestrian Volume. Warrant 4 -School Crossings. Warrant 5 -Progressive Movement. Warrant 6 -Accident Experience. Warrant 7 -Systems. Warrant 8-Combination of Warrants. 9-41.3 Warrant 1 -Minimum Vehicular Volume The minimum vehicular volume warrant is intend- ed for application where the volume of intersecting traffic is the principal reason for consideration of sig- nal installation. The warrant is satisfied when for each of any 8 hours of an average day the traffic volumes given in the table below exist on the major street and on the higher-volume minor street ap- proach to the intersection. Number of lanl!s for moving traffic on each approach Vehicles per hour on major street (total of both approaches) Vehicles per hour on higher• volume minor- stre et approach (one direction only) (Minimum Requirements) Major Street Minor Street ur~an Rural ~ Rural 1 . • .• -•• 1-------500 350 150 105 2 or more --1-------600 420 150 105 2 or more --2 or more --600 420 200 140 1-------2 or more.;;. 500 350 200 140 &-2 12-1919 TRAFFIC SIGNALS AND LIGHTING Traffic Manual The major street and the minor-street volumes are for the same 8 hours. During those 8 hours the direc- tion of higher volume on the minor street may be on one approach during some hours and on the opposite approach during other hours. Left tum movements from the major street may be included with minor ·street volumes if a separate signal phase is to be provided for the left tum move- ment. The left tum volume in the highest direction may be added to the minor street volume on the highest approach and the major street volume should be reduced by this amount. 9-01.4 Warrant 2 -lnterruptlan of Contlnuou1 Traffic The interruption of continuous traffic warrant ap- plies to operating conditions where the traffic vol- ume on a major street is so heavy that traffic on a minor intersecting street suffers excessive delay or hazard in entering or crossing the major street. The warrant is satisfied when for each of any 8 hours of an average day the traffic volumes given in the table below exist on the major street and on the higher- volume minor street approach to the intersection, and the signal installation-will not seriously disrupt progressive traffic flow. Number of lanes for moving traffic on each approach Vehicles per hour on major street (total or both approaches) Vehicles per hour on higher• volume minor• street approach (one direction only) (Minimum Requirements) Major Street Minor Street Yw!L ~ ~ ~ 1------~ 1-------750 525 75 53 2 or more --1-------900 630 75 53 2 or more --2 or more --900 630 100 70 1-------2 or more •· 750 525 100 70 The major street and minor street volumes are for the same 8 ho\JrS. During those 8 hours the direction of higher volume on the minor street may be on one approach during some hours and on the opposite approach during other hours. Left tum movements from the major street may be included with minor street volumes if a separate signal phase is to be provided for left tum move- ment. The left tum volume in the highest direction may be added to the minor street volume on the highest approach and the major street volume should be reduced by this amount. 9-01.5 Warrant 3-Mlnlmum PadHtrlan Volume The minimum pedestrian volume warrant is satis- fied when for each of any 8 hours of an average day the following traffic volumes exist: ' 1. On the major street 600-Urban, 400-Rural or more vehicles per hour enter the intersection (total of both approaches): or 1,000-Urban, 700 -Rural or more vehicles per hour (total of both approaches) enter the intersection on the ma- jor street where there is a raised median island four feet or more in width; and 2. During the same 8 hours as in paragraph L, there are 150-Urban, 105-Rural or more pede- strians per hour on the highest volume cross- walk crossing the major street. A signal installed under this warrant at an isolated intersection should be of the traffic-actuated type with push buttons for pedestrians crossing the main street. If such a signal is installed at an intersection within a signal system, it should be equipped and operated to provide proper coordination. Signals installed according to this warrant shall be equipped with pedestrian indications conforming to requirements set forth in other sections of this Man- ual. Signals may be installed at nonintersection loca- tions (Mid-block) provided the requirements of this warrant are met, and provided that the related cross- walk is not closer than 150 feet to another established crosswalk. Curbside parking should be prohibited for a minimum of 100 feet in advance of and 20 feet beyond the crosswalk. Phasing, coordination and in- stallation must conform to standards set forth in this Manual. Special attention should be given to the sig- nal head placement and the signs and markings used at nonintersection locations to be sure drivers are aware of this special application. _Ml.6 Warrant 4 -Schaal Cra11in11 See Chapter 10. Ml.7 Warrant 5 -Pragra11lva Movement The progressive movement warrant is satisfied when one of the following is true: 1. On a one-way street or on a street which pre- ponderantly has unidirectional traffic signifi- cance, adjacent signals are so far apart that the necessary degree of platooning and speed con- trol of vehicles would otherwise be lost or, 2. On a two-way street, where adjacent signals do not provide the necessary degree of platooning and speed control and the proposed and adja- _cent signals could constitute a progressive signal system. The installation of a signal according to this war- rant should be based on the 85-percentile speed un- less an engineering study indicates that another speed is more desirable. The installation of a signal according to this war- Traffic Manuel TRAFFIC SIGNALS AND LIGHTING 9-: rant should not be-consider~d where the resultant signal spacing would be.less than 1,000 feet. 9-41,8 Warrant 6-Accldant Experience The accident-experience warrant is satisfied when: . I. Adequate trial of less restrictive remedies with satisfactory observance and enforcement has failed to reduce the accident frequency; and 2. Five or more reported accidents of types sus- ceptible of correction by traffic signal control have occurred within a 12--month period, each accident involving personal ,injury or property . damage to an apparent extent of $200 or more; and 3. There exists a volume of vehicular and pedes- trian traffic not less than 80 percent of the re- quirements specified in the minimum vehicular -volume warrant, the interruption of continu- ous traffic warrant, or the minimum pedestrian • -volume warrant; and 4. • The signal installation will not seriously disrupt progressive traffic flow. 9-41.9 Warrant 7 -Sy1tam1 Warrant A traffic signal installation at some intersections may be warranted to encourage concentration and organization of traffic flow networks. The systems warrant is applicable when the common intersection of two or more major routes has a total existing, or immediately projected, entering volume of at least 800 vehicles during the peak hour of a typical week- 12-197 day, or each of any five hours of a Saturday and/01 Sunday. A-major route as used_in the above warrant has om or more of the following characteristics: I. It is part of the street or highway system tha serves as the principal network for through traf fie flow; 2. It connects areas of principal traffic generation 3. It includes rural or suburban highways outsid, of, entering or traversing a city; 4. It has surface street freeway or expresswai ramp terminals; 5. It appears as a major route on an official plar such as a major street plan in an urban are, traffic and transportation study. 9-41.10 Warrant 8-Cambinatlon of Wanant1 In exceptional cases, signals occasionally may b, justified where no single warrant is satisfied bu where any two of Warrants 1, 2 and 3 are satisfied t, the extent of 80 percent or more of the stated numer ical values for each of any 8 hours of an average day 9-41. 11 Periodic Traffic Sl1nal Studies To maintain the desirable operation of existin1 traffic signals, it is necessary to periodical:'y conduc engineering studies to en~ure that t~e des~red ope~a tion is realized. In particular, engmeenng studie should determine whether the installation continue to be justified and that the signal timing in use meet the current traffic requirements. 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: • 1. On the less important road at its intersection with a main road where application of the nor- mal right of way rule is unduly hazardous as evidenced by accidents susceptible 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 conjunction with il 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 tum 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 hoqr. c. When the BS-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- m_ented by a separate plate mourited below it with the message "3-WAY", "4-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 18"x18" size has been added. The sign format has been changed to agree with the federal format Please note the m_inor change in border width for the 24", 30", 36" and 48" sizes.