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1972 Manual for School Crossing Protection I , 'I I .1 I I I I 'I I !I I 'I I I I II I I I II SCHOOL CROSSING PROTECTION MANUAL POLICIES AND PRACTICES for the CITY OF SALINA, KANSAS , prepared by CITY ENGINEERING DEPARTMENT Adopted by the City Commission and approved by , ~c:z{'J./ ! . / MAYOR on this 28th day of August , 19 72 . ,--' 'I OF .... --- ,'l. ..". o _ =- ~ .........~...., I, -' cJSeal)'.,c,:., ",'4- 'i., o ~: Cl to tU Z k'IJ" "? '.. ... t-. ~ ., '; ...4Ptes~' : ~ ~ " . 1870 .:>' ~ C'J .... :~ E \, ~ ~"'~~~il~;:L\..";' ....~!.e,j ; .ift," ........,... ~- . v .':;{~." '1/' . ...- '. v! .'o'(J~.--r I' .r~,./,...r....~-' ..'1H"i~crerk . ; /..t.../ I I I I I I I I I I I I II I I I I I I TABLE OF CONTENTS INTRODUCTION -'- - - - - - - - - - - - - - - - - - - - - - 1 NEED FOR STANDARDS - - - - - - - - - - - - - - - - - - -- 2 EDUCATION - - - - - - -- - - - - - - - - - - - - - - - - 4 PROGRAM - - - - - - - - - - - - - - - - - - -'- - - - - - 6 SAFE GAP-BLOCKADE CONCEPT - - - - - - - - - - - - - - - - 10 SCHOOL CROSSING CONTROL CRITERIA - - - - - - - - - - - - - 13 METHODS OF PROTECTION - - - - - - -- - - - - - - - - - - 17 PARKING RESTRICTIONS - - - - - - - - - - - - - - - - - - - 25 LOADING AND UNLOADING - - - - - - - - - - - - - - - - - - 25 SIDEWALKS - - - - - - - - - - - - - - - - - - - - - - - - 26 ILLUSTRATIONS TYPICAL SCHOOL ROUTE MAP - - - - - - - - - - - - - - - - - 9 SAFE GAP-BLOCKADE CONCEPT - - - - - - - - - - - - - - - - 12 ADEQUATE GAp TIMES IN SECONDS - - - - - - - - - -.- - - - 16 SPECIAL TRAFFIC. CONTROL - GRAPH - - - - - - - - - - - - - 21 SIGNS FOR SCHOOL PROTECTION - - - - - - - - - - - - - - - 27 - 28 SIGNING STANDARD (NO STOP INTERSECTION) - - - - - - - - - 29 SIGNING STANDARD (TWO-~IAY STOP INTERSECTION) - - - - - - -29 SIGNING STANDARD (FOUR-WAY STOP INTERSECTION) - - - - - - 30 SIGNING STANDARD (SIGNALIZED INTERSECTION) - - - - - - - - 30 SCHOOL AREA SIGNING - - - - - ~ - - - - - - - - - - - - - 31 - 32 STANDARD SIGNALIZED INTERSECTION - - - - - - - - - - - - - . 33 . PUSH BUTTON TRAFFIC SIGNAL (AT MID-BLOCK) - - - - - - - - 34 PUSH BUTTON TRAFFIC SIGNAL (AT INTERSECTION) - - - - - - - 35 I I I I I I I 'I II I I I I I I I I I I INTRODUCTION The purpose of this Manual is to provide the parents, teachers, school safety groups, school administrators and other citizens with plans and information. This will also provide guidelines and answers to questions in a planned coordinated School Traffic Safety Program. The plans and program presented herein will set the criteria for all special school traffic control uses at school crossings, showing typical plans for location of all signals, signs and street markings. There will always be an occasional location at which the desired plan may require some revision. Any revision necessary will be made in accordance with the "MANUAL ON UNIFORM TRAFFIC CONTROL DEVICES". 1 I I I I I I I I I I I I I I I I I I I NEED FOR STANDARDS One of the most pressing and controversial problems con- fronting Traffic Engineering and enforcement agencies is the safety of children on their way to and from school. Because young children are not mature enough to take care of themselves in traffic, their protection becomes the responsibility of the City Traffic Officials, with the cooperation of school authorities, parents and the children themselves. If all the demands of parents and others were met, there would have to be more: police, adult guards for school duty, traffic signals, signs, and markings. Such demands; however, are not always in line with actual needs. Analysis often show. that at many locations, school crossing controls requested by parents, teachers, and other citizens are unnecessary, costly, and tend to lessen the respect for controls that are warranted. Pedestrian safety depends in large measure upon public understanding of accepted methods for efficient traffic control. This principle is never more important than in control of pedestrians and vehicles in the vicinity of schools. Neither school children nor motorists can be expected to . move safely in school zones unless they understand both the need for traffic controls and the ways in which these controls function for their benefit. 2 . . . . . . . I . . I . . . !. I il . ,. In order to achieve uniformity of traffic control in school areas, comparable traffic situations must be treated in the same manner. Each traffic control device and control method herein described fulfills a specific function to specific traffic conditions. The type of school area traffic control used, either warning or regulatory, must be related to the volume and speed of traffic, street width, and the number of children crossing. For this reason, the traffic controls necessary in a school area located on a major street would not be needed on a residential street away from heavy traffic. Yet, the impor- tant point to be made is that a uniform approach to school area traffic controls must be developed to assure the use of similar controls for similar situations (which promotes uniform behavior on the .part of motorists and pedestrians). 3 I I I II I I II I I I I I I I I I I I I I EDUCATION Child Safety and the Use of School Signs - It is not the purpose of school signs or signals to train a child how to safely cross a busy street. When there are only a few cars using the street, a child should wait for a safe gap in traffic; and the child should be instructed not to cross when vehicles approach. At school crossings located adjacent to . the school, his responsibility should be shared with a welJ- trained school safety patrol. On a heavily traveled street, the responsibility for helping him make a safe crossing must be that. of a responsible agency. When such control of the school children at a crossing is not in effect, adverse crossing habits are developed which often coincide with driver violations of school warning signs or signals, and the inevitable 'injury to a school child results. Without proper guidance on heavily traveled streets, the small child learns to place a high degree of dependence on the school crossing signs or signal devices which may lead to faulty or unsafe crossing habits such as stepping into the school crosswalk to obtain right-of-way or crossing the street before the vehicles come to a stop as required by the signal. Often children will fail to look in both directions before crossing a street to make sure vehicles are stopping. They may also .have a tendency to indulge in play at these locations. Since traffic signs and signals are not 100 per cent effective, child safety education in how to cross streets safely becomes imperative 4 I I I I I I I I I I I I I I I I I I I I if we are to assure their safety. There are some parents who believe that school children cannot be expected to use, nor have the necessary judgment that is required of them in order to cross a street safely, even when there are a sufficient number of gaps in traffic. Safety education of the child must be started early by the parents. This safety education should be supplemented by the school authorities, and by City Traffic Officials until such time as the growing child becomes more capable of accepting the responsibility for his own safety. It is difficult to train children to look in both directions and to wait for a safe gap in traffic before crossing a street. Difficult as it is -- there is no other way. There is no mechanical or electrical device which can assume this responsibility for a child. We can transfer.this responsibility in his early years to a schoo; boy patrol or a responsible agency, but a program of safety education begun early in his life by parents and carried forward by both parents and school authorities can make it possible for the child to accept this responsibility early in his life. The parent's responsibility becomes imperative to the success of any school child safety program if we are to assure his safety in light of today's growing traffic volumes. 5 I I I I I I I I I I I I I I I I I I I PROGRAM For School CrossinQ Protection - A school route plan for each school serving elementary and kindergarten students is useful in developing uniformity in the use of school area traffic controls. The plan shall be developed by the school and traffic officials responsible for school pedestrain safety, consisting of a simple map showing streets, the school, existing traffic controls; established school routes, and established school crossings. The plan permits the orderly review of school area traffic control needs, and the coordination of school pedestrian safety education and engineering activities. Every school shall submit annually its current school district map detailing the above required information for evaluation by the traffic officials and the school safety committee for suggested alternations or approval. School routes should be planned to take advantage of the protection afforded by existing traffic controls. This planning criteria may make it necessary for children to walk a non-direct, longer distance to an established school crossing located where there is existing traffic control, and to avoid the use of a direct, hazardous crossing where there is no existing traffic . control. Factors which must be considered when determining the feasibility of requiring children to walk a longer distance 6 I I I I I I I I I I I I I I I I I I I to a crossing (with existing traffic control) are: 1. The availability of adequate, safe sidewalks or off-roadway sidewalk area to and from the location with existing control. 2. The number of chil dren us i ng the cross i ng. 3. The age levels of the children using the crossing. 4. The total extra walking distance. Selection of the Crossing Locations - It is desirable that the number of school crossings be held to a minimum for a number of reasons. If too many crossings are designated, motorists and children will tend to be less alert at school crossings. The more crossings that are established, the more difficult it becomes to keep them functioning properly and maintained. Selection of a 'mid-block location when the school is adjacent to the arterial street automatically restricts the crossing to one location and immediately answers several of the problems with which we are concerned. The mid-block location inconveniences very few children and increases the crossing location safety factor. Selection of one or the other of two intersections on a street for the location of a school crossing when a school is located away from the through street imposes several restrictions. In any case, a high percentage of the school children required to cross the through street in going to' and from school is going to be inconvenienced. This inconvenience becomes secondary to their safety. Once the location is 7 I I I I I I I I I I I I I I I I I I I selected. parents and school authorities shall cooperate to assure its use by the children. This is imperative to the success of the program. It has often been observed in the course of our studies. that even when a school crossing is properly maintained and supervised, that children often cross at other locations along the street. The most efficiently conceived plan of control and child supervision is rendered inefficient to protect some of the very children it is designed to aid. all because of lack of parent and school instruction in safety education as to where to cross and why. A child may thus be injured going to and from school due to lack of training or instruction. When a school is located away from the heavily traveled street. it becomes necessary to select one or the other of two intersections. If one is already signalized. then that intersection should be selected. If not. the intersection should be selected which has the better sight distance. level grades for the approaches to the crossing and refuge points for the children. If there is not any appreciable difference in the physical conditions at the intersection. one should be selected which will serve the highest percentage of the children who must cross the arterial street with the least amount of inconvenience to all the children. All children must be instructed that they shall use this school crossing; its use by all the children involved shall be a prerequisite to its approval and installation. 8 1 .... . . . 1 1 1 1 1 1 1 1 1 1 1 1 I. . . . 1 1 1 1 I.. .. .". . . . .. TYPICAL SCHOOL ROUTE ,MAP . . ---: '/ ~\'''''... n. . " " ,_. c.:. ." .".. . ~. ~ ." LE'(N2. ---0-- "'" stlCOl,. IlWI't @ tlW'f1(SIGIIo\'- ~"."'''"''''. \ II:""''''' .""" 9 II I I I I I I I I I I I I I I I II II II SAFE GAP-BLOCKADE CONCEPT The key to safety in crossing any street is the safe gap in traffic concept. The following, taken from a traffic engineering publication, explains this concept in greater detail. a. "If reasonable safety for crossing \~ithout control of traffic is to be assured, natural gaps in traffic should be sufficient for the child or group to walk (not run) from one curb to the other. Observations indicate that elementary school children walk about 3.5 to 4.5 feet per second, 3.5 seems to be close enough for the purpose. b. If the time between gaps average more than about a minute, children singly or in groups will lose patience and either start to play, which distracts attention from the problem of 'crossing and may cause darting into the street, or they I force I . gaps too sma 11 to permit compl ete cross i ng; that is, they filter through traffic. c. Large groups of children obviously require longer to cross the street than single children or small groups. Thirty to forty children, as many as can ordinarily be accumulated at one time, will straggle to expand to about 20 feet in crossing. This is, when the first ones are across, the last ones will be 20 feet from the curb. d. Based on these characteristics of behavior, it is possible to compute the volume of traffic which will not give natural.gaps great enough and frequent enough to permit children to cross without traffic interference. For example, 10 I I I I I II I I :1 I I I I II I I I I I if small groups of children must cross a 40 foot street, natural gaps long enough to permit walking clear across will occur on the average of more than one a minute with traffic volumes (total. of both directions) up to 500 vehicles per hour. Above that volume, natural gaps will be shorter and less frequent. e. Some factor of safety is needed to allow for slower walkers, inability of children to judge borderline opportunities. to cross and other unfavorable conditions. This factor of safety is provided. The whole width of the street is rarely blocked simultaneously so that a child can start across while the opposite side is blocked. The obstructing vehicle will have cleared before there is any conflict with the pedestrian; hence, the actual time available for crossing is greater than that used as a basis for calculation. This is especially true at school crossings because the children cross the street in one direction only during a gap in traffic." 11 I- I' I' I- I, I I I I I I I I I I I I I I r ~ll L___~ 0.. If) l? ! <( 0 z ( l? Z oc J 8 , w W w 2 LLI Z I W ~ I- If) - l? - ~ Z W - t.> w > Z 9 ~ <( L> a :r: ((J lJ.. W l- t.> :R lJ.. iJ L> <( ::> w 0:: (' If) .:...I I- { ~ _.- ---,~. 1- 0.. hi' 0 0.. Z n... w ~ LJ 0 <( u.. U t.> l? ~ ~ w w Z ~ If) :? Z ;;; 8 - I- ~ <( c - } ----~ . toJ (L 4: ~ W <( ~ :t: Z W 0: l? I- 8 . In W If) t.> 0 lJ 0 ~ If) If) ...J <( W ((J I- ...J - t;'\ - --_...:..:....._- ~ U U Ii.. \" g z LL w <( > CD w 0: .:...I I 1- w z CL <( <( <( :elf) 1-0 t9 O::z 0.. ll... Wo ;3 l?L> W 0 Z Ltl W l.L. Olf) lJ.. ...J ;7i <( n... (/) <( l? w 2 I- -~-..,. (} '_:1. ~ . . 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I-< nJ I:: Ul .j..I nJ.j..Ip, tJ>Ul 0 Ul I-< QJ QJ'rl '{J .j..I'HoQJr-l.j..lQJ.G ennJ.j..I'HUHH.j..I ::I en nJ-.-IOQ)'{J r-l '{J en.G p''{J ',1 r-lQ)QJ QJ '.-I~ -.-Ir-lr-l'H:>QJUl .Q r-l 0 en I:: .j..I 8nJO 1::000 nJl::l-<'{JQJ.Guo I-< O.j..l <:J QJ.j..I 'H tJ>en I:: en ~ QJ 1IJ1IJ00.j..lQJ.QM '.-IQJUP,QJH M '{J H 8.Q r.l .j..I QJ 0 0 nJ en.G.O U en UlII:: ..-I.jJ r-l QJ I:: H .G..-I H en r.l '{J rj 0 E-t.~ 0 nJ :> nJ U "-I '- I I I I I I I I I I I I I I I , I I ,I I , II SCHOOL CROSSING CONTROL CRITERIA Alternate gaps and blockades are formed in the vehicular traffic stream in a pattern peculiar to each crossing location. For safety, a pedestrian must wait for a gap in traffic that is of sufficient duration to permit a street crossing without interference from vehicular traffic. When the delay (between the occurrence of adequate gaps) becomes excessive, children may become impatient and endanger themselves by attempting to cross the street during an inadequate gap. This delay may be considered excessive, when the number of adequate gaps in the traffic stream, during the period the children are using a crossing, is less than the number of minutes in that same time period. With this condition (when adequate gaps occur less frequently than an average of one per minute) some form of traffic'control is needed which will create (in the traffic stream) the gaps necessary to reduce the hazard. The recommended practice for determining the minimum length (in seconds) of a gap ~n traffic which will permit an 85 percentile group of pedestrians to cross a roadway of a specified width is known as the Adequate Gap Time (G) which includes both perception and reaction time and the time needed to walk across the roadway without coming in conflict with passing vehicles. The Adequate Gap Time may be computed using the following equation or take~ from Table I (in either case the values for "w" and "N" are those determined in a group size study). 13 I I I I I I I I I I I I I I I I I, I I G = ~ + 3 + (N-l)2 Where G = Adequate Gap Time in seconds. ~ = Crossing Time in seconds (critical width in feet 3.5 of the pavement to be crossed, "W", divi ded by the assumed juvenile pedestrian walking speed of 3.5 feet per second). 3 = Pedestrian Perception and Reaction Time (the number of seconds required for a child to look both ways, make a decision, and commence to walk across the street) . (N-l)2 = Pedestrian Clearance Time (additional seconds of time required to clear large groups of children from the roadway.) Children are assumed to cross the roadway in rows of five with two-second time intervals between each row. The clearance time interval is equal to (N-l)2 where "N" is the number of rows, 1 represents the first row and 2 the time interval between rows. Those intervals or traffic gaps that are equal to or greater than the adequate gap time are the periods when children must cross the roadway. The intervals between these gaps are the delay gaps, the sum of,which is the actual pedestrian delay. School Area Traffic Signals - A school signal (Standard Traffic Control Signal) may be warranted at an established school crossing when a Traffic Engineering Study (of pedestrian group size and available gaps in the vehicular traffic stream) indicates that the number of adequate gaps in the traffic stream during the period the children are using the erossing is less than the number of minutes in the same period. When traffic control signals are installed entirely under thi s warrant: 1. Pedestrian indications shall be provided at least for each crosswalk establ ished as a school crossing. 14 I I I I I I I I I I I I I I I I I I I "T2. II 3. I, \ At non-intersection crossings, the signal should! be pedestrian actuated, parking and other obstrucl tions to view should be prohibited for at least r 100 feet in advance of and 20 feet beyond the ' crosswalk, and the installation should include .suitable standard signs and pavement markings. 15 I: 'I I I I I I il i III Cl z II 0 u fil III Z I H , III .i ~ H I e.<, P< A; .. C) I ~ .. I fil. Cl A; I I I I I I I 0 U) "- 00 '" 0 .-l N M <;j' LO U) I" 00 0 M .-l N N N N M M M M M M M M M <;j' <;j' .. . <;j' ltl U) I" 00 '" 0 .-l N M <;j' LO U) 00 r-I '" N N N N N N M M M M M M M M <;j' . N M <;j' LO U) I" 00 '" 0 .-l N M <;j' U) '" 00 .N N N N N N N N M M M M M .M M . 0 r-I N M <;j' LO U) I" 00 '" 0 r-I N <;j' I" I" N N N N N .N N N N N M M M M M Iii< - .. III ~ 00 '" 0 .-l N M <;j' LO U) I" 00 '" 0 N LO 0 U) .-l r-I N N N N N N N N N N M M M P: 'H 0 l.l U) I" 00 '" 0 r-I N M <;j' LO U) I" 00 0 M QJ LO .-4 .-4 r-I .-4 N N N N N N N N N M M ~ ::1 Z <;j' LO \l) I" 00. '" 0 .-4 N M <;j' LO \l) 00. .-4 <;j' .-4. r-I .-4 .-4 .-4- .-4 N N N N :N. N N~ .N. M. . , N <"I <;j' LO \l) I" 00 '" 0 r-\. N <"I .<;j' U) '" M .-4 r-I .-l .-4 .-4 .-4 .-4 .-4 N N N N N N N . 0 .-4 N M <;j' LO \l) r- OO "'. 0 .-4 N <;j' I" N .-4 .-4 .-4 .-4 ri ri ri ri .-4 .-4 N N N N N 00 en 0 .-4 N. M <;j' LO \l) I" 00 en 0 N LO .-4 ri .-4 .-l ri .-4 .-4 .-4 .-4 .-4 .-4 N N N . . . .. .... -:c ~ - .<:: .... 't:l en N \l) en M U) 0 M I" o. <;j' I" .-4 00 0 .r! .-4 N N N M M <;j' <;j' <;j' LO LO LO \l) \l) 00 ~ I I I I I I I I I I I I I I I \l) 0 M I" 0 '<i' I" ri <;j' 00 ri LO 00 LO LO :>1 .-l N N N M M M <;j' <;j' <;j' LO LO LO \l) I" III ~ . III ~ H 1'-1 ..:l rQ I'l; e.< 16 I I I I I I I I II I I I I I I I I I ~ METHODS OF PROTECTION It is the responsibility of the child aided by the,school patrol member or by a mechanical device to select the proper gap in traffic and safely cross the street. When there is less th~n one natural safe gap per minute, those responsible must establish controls 'to create adequate artificial 9ars. This is, the basic axiom'of school crossing protection. Safe gaps may be provided by either installing pedestrian actuated school crossing signals or completely signalizing , -';'7f the i ntersecti on'l The most difficult question to answer is, "When should patrol protection or a s,ignal be used to protect a particular crossing location?" As previously stated, Traffic Engineers are able to analyze statistical data from various crossings and determine theoretically the comparative safety for specific crossings. Through the recording of the data taken from actual crossings and the evaluation of their safe operations, empirical formulas have been devised. This has led to the setting up of standards or criteria which are called "warrants". When I these warrants are met, that is to say when vehicle and pedestrian volumes for a specific length of the crossing reach' the level requiring a particular type of control, every effort , is made to provide the type of control or traffic protection suitable to the warrant. ! The simple fact that 'a crosswalk exists in the proximity' I of a school, warrants the placement of school crossing signs. ~ 17 I I I I I I I I I I I I I I I I I I I l . - I However, the warrant .for a sc~ool crossing signal or fully. l 'j_i~n~l.ized intersection is, understandably, much more complicated. \ School safety patrols have proven very useful since their inception in Salina. When properly used, the patrol fulfills a three-fold purpose. First, it provides supervision at a crossing which needs only limited protection. Second, its members instruct and guide younger children to correctly choose safe gaps enabling them to cross streets safely. Third, it provides the child with a better under~tanding of safety, creates leadership and a sense of responsibility. There is a generally accepted concept among safety educators that pupils should be taught at an early age how to cross streets safely. Parents and educators are the logical ones to do this job. In no'case should the patrol member be expected to assume the responsibility of directing vehicular traffic. When sufficient natural safe gaps do not occur in traffic, artificial safe gaps should be mechanically provided only by authorized devi ces. School crossing signals installed in Salina shall be of the standard type with red, yellow and green indications to motorists. They should be mounted at intersections in standard position on pedestals or mast arms and display a solid green to motorists 24 hours a day except when actuated by a pedestrian. They are different from regular traffic signals in that they do not control side-street traffic, but instead have the push 18 I I I II I I I I I I I I I I I I I I I button for actuation by pedestrians. They are always signed as school crossings. When pedestrians approach to cross the street, they push the button which actuates the light. The signal goes from solid green to amber, which is visible to motorists for approx- imately 3.5 seconds, providing time for passing vehicles to clear the crossing and approaching vehicles time to stop. This 3.5 second clearance time is followed by the red stop indication. Red represents the pedestrian crossing time and clearance time and is present for a specified number of seconds at each individual crossing. After each pedestrian crossing , and clearance interval, the signal reverts to solid green for a certain amount of time at each individual crossing before the signal will again respond to pedestrian push button demands. This enables traffic to flow without unreasonable delay before providing another safe gap for pedestrians within a reasonable time. . The fOllowing formula will be used to establish the.hazard r. .~ f" . .. .." .' factor which will be the criteria in determining'a warrant for \pecial school crossing traffic control measures. ~ (N) = H (which will be known as the hazard factor) 1000' . if the product of the vehicle traffic volume (V) stated in thousands of vehicles per hour during the crossing period, , ~. multiplied by the number of children (N) crossing~~~r-from ..-- school in anyone crossing period exceeds a hazard factor (H) of: 19 " I II I I I I I I I I I I II II I I I I I a. 10 - flashing signals with 20 M.P.H. speed zone 'are warranted. . b. 20 - signalized traffic controlled crossing is , warranted. , , . , . L.t c. 40 - signal ized"traffic controlled crossinq ,with adult, guard is warranted. The school safety committee has the option of raisinq the hazard factor as follows: POINT ASSI~NMENT' a. ,School crossings on streets that have a posted speed 1 imit in excess of 30 miles per hour, ~dd one poi nt to the .h?zard factor for each mi 1 e per, hour in excess of 30 miles per hour. 'b. School crossings on streets thatha"e a paved width in excess of 50 feet, add one point to , ' the hazard factor for each foot of pavement in excess of 50 feet. These warrants are based upon the traffic safe gap concept to establish a uniform scaie for measuring need for school crossing signals. J . A school crossinq siqna1 may be supplemented by a safety patrol member who has been schooled in the signal's operation. Traffic signals, with which we are all familiar, are intended as a control of vehicular traffic. It is hiqhly desirable to use this regular signal at any schoolcrossinq 20 L_~ 'I If I I I II I II I I I II I I I I I I I I I which meets the minimum warrants for traffic signal installation. .The Traffic Engineer uses the warrants recommended by the . Institute of Traffic Engineers, in determination of whether or not traffic signals should be installed. The warrants .for this signal, as set forth in the "Manual of Uniform Traffic Control Devices", approved by the Federal Highway Administration as the national standard for all highways open to public travel in accordance with Title 23. U.S. Code. Section 109 (b) 109 (d) and 402 (a). 1. The vehicular volume warrant is satisfied when for each of any eight hours of an average day, the traffic volumes given in the following table exist on the major street approach to the intersection and on the higher volume minor street. 21 I I I I I I I !I I I I I I I I I I I L TABLE 1 MINIMUM VEHICULAR VOLUMES FOR REGULAR TRAFFIC SIGNAL INSTALLATION HIGH VOLUME INTERSECTING TRAFFIC NU~1BER OF LANES FOR MOVING TRAFFIC ON EACH APPROACH VEHICLES PER HOUR ON MAJOR STREET (TOTAL OF BOTH APPROACHES) VEHICLES PER HOUR ON HIGHER VOLUME MINOR STREET APPROACH (ONE DIRECTION ONLY) MAJOR MINOR STREET . STREET 1 . 1 500 150 2 or more 1 600 150 2 or more 2 or more 600 200 1 2 or more 500 200 2. The "interruption of continuous traffic" warrant is satisfied when for each of any eight hours of an average day the traffic volumes given in the following table exist on the major street and on the higher volume minor street approach and the signal installation will not seriously disrupt progressive traffic flow. TABLE 2 MINIMUM VEHICLE VOLUMES FOR REGULAR TRAFFIC SIGNAL INSTALLATION INTERRUPTION OF CONTINUOUS FLOW NUMBER OF LANES FOR MOVING TRAFFIC ON EACH APPROACH VEHICLES PER HOUR ON MAJOR STREET (TOTAL OF BOTH APPROACHES) VEHICLES PER HOUR ON HIGHER VOLUl4E MINOR STREET APPROACH (ONE DIRECTION ONLY) MAJOR STREET 1 2 or more 2 or more . 1 MINOR STREET 1 750 75 1 900 75 2 or more 900 100 20r more 750 100 3. The minimum pedestrian volume warrant is satisfied when for each of any eight hours of an average day the following traffic volumes exist: 22 II I I I I I I !I I I I I I I I I I I I a. On a major street 600 or more vehicles .per hour enter the intersection (total of both approaches); or 1000 or more vehicles per hour (total of both approaches enter the intersection on the major street where there is a raised median island 4 feet or more in width; and during the same eight hours there are 150 or more pedestrians per hour on the highest volume crosswalk crossing the major street. 4. Progressive Movement. It is occasionally found that the installation of a traffic signal at a non-signalized location can be justified based upon its position when considered within the limits of a time-space diagram i.e. vehicles need to be channeled into groups of a size and speed that can be handled at.the next signalized intersection. 5. Accident Experience as a warrant: a. Adequate trial of less restrictive remedies with satisfactory observance and enforcement has failed to :reduce the accident frequency; and b. Five or more reported accidents of types susceptible to correction by a traffic control signal have occurred within a 12 month period, each accident involving personal injury or property damage to an apparent extent of $100.00 or more; and 23 I I 'I I I I I I I I I I I I I I I I I c. There exists a volume of vehicular and pedestrain traffic not less than 80 per cent of the requirements specified in the minimum vehicular volume warrant, or the minimum pedestrian volume warrant; and d. . The signal installation will not seriously disrupt progressive traffic flow. 6. Combination of warrants. Signals may occasionally be justified where no one warrant is satisfied but two or more are satisfied to the extent of 80 per cent or more of the stated values. These exceptional cases should be decided on the basis of a thorough analysis of facts and adequate trial of other remedial measures which cause less delay and inconvenience to traffic. ExperJence indicates and patrol history substantiates that a well trained patrol member can handle the school crossing maneuver at a regular or pedestrian actuated signalized intersection. 24 I I I I I I I I I I I I I I I I II II I PARKING RESTRICTIONS As a part of any school traffic safety program, the restriction of parking adjacent to crossing locations and 'school grounds is essential for the safety of school children. NO PARKING should be permitted within twenty (20) feet of any intersection and within thirty (30) feet of a signalized intersection used by school children. The curb in this area should be painted yellow for no parking at any time. NO PARKING should be permitted for at least one hundred (100) feet in advance of and twenty (20) feet beyond on either side of the street at a mid-block crossing. The curb in this area should be painted yellow for no parking at any time. NO PARKING - 8:00 A.M. TO 4:00 P.M. - SCHOOL DAYS, should be permitted on the school side of the street, except for loading and unloading. Personnel who work in the school buildings should be encouraged to park on the far side of a side street away from the main entrance of the school. LOADING AND UNLOADING Loading and unloading of school children should be carried out at the curb side adjacent to the school grounds. This area should be signed for loading and unloading and drivers should pause only long enough to load and/or unload and not leave their vehicle. 25 I. I I I I I I, I I I I I I I I I I I I SIDEWALKS Much time has been devoted to traffic surveys, compiling of statistics and devising suitable controls for a safe pedestrian crossing of traffic ways. These are to no avail if sidewalks are not provided for the children and they are forced to use the street in going to and from school. Such is the case in many of the newer additions in Salina. Also, some of the schools do not have sidewalks around the school property. The lack of sidewalks in school areas is a serious weakness in the Salina school traffic safety program. Sidewalks should be available to schools on both sides of the street and should extend to the point of dispersion of the students. Fencing is an excellent safety device and eliminates the vehicle and student conflict which occurs during the play period and at school dismissal. The separation of vehicular traffic from pedestrain traffic should be expanded and encouraged. When a school district line can be located along a traffic thorough- fare, this eliminates the need for any school child to cross that thoroughfare in going to and from school. This should be recognized as an important factor in planning the location of future schools. 26 I I I I I I I I I II I I I I I I I I I SIGNS FOR SCHOOL PROTECTION . .' - ~ ~-':t"'~~~;V . ;.~....:-:;_~-"';-:'f!~,.r..:.~:,;.;,~....~.~~--.:; -AU . "BH 52-1 30"X 30~ . BLACK ON YELLOW '51;..1 30~X 30" . BLACK ON YELLOW 8AM-9AM ~'...mr~~J . 3PM-4PM [ SCHOOL] "D~~ 54-3 24~X8" BLACK ON YELLOW FRONT 24"XIS" BLACK ON WHITE . 8:00AM.4:00PM SCHOOL DAYS . ."E" 24~X IO~ BLACK ON WHITE END "--L SPEED LIMIT. 20 lONE BACK 24"XIB" BLACK ON WHITE .H'~ -- 27 . R2-1 . 24"X 30" BLACK ON WHITE SIGNS FOR SCHOOL PROTECTION . I I ([ SCHOOL 1] . ([ SCHOOL ]J / I . SCHOOL SPEED LIMIT I SPEED SPEED (f) I LIMIT LIMIT I 20 20 (20) I 8:00AM-4:00PM 8AM 9PM . I SCHOOL DAYS -:r I 24")(48" SIGN ASSEMBLY WHEN FLASHING ADJACENT TO SCHOOL ':JII' . Z4-X56" I SIGN ASSEMBLY AWAY fROM SCHOOL ',- "K.' I 36"X68" PEDESTAL MOUNTED I I ONO . NO ~ PARKING PARKING PARKING PASSENGER. I ANY 8AM-4PM SCHOOL LOADING TIME - "DAYS SCHOOl. DAYS I 8AId TO 4PM -r= oM- . ~ IZ'X IS- o. 12.XI8" I RED ON WHITE RED ON WHITE oN" 18"X24" I RED ON WHITE I I 28 I I II I I II I I I I I I I I I I I I I -RESfI5tNTlAL - - ----.- . . ~ , A, 01 I , , . i , . , ; , . I , '" RESIDENTIAL - RESIDENTiAL NO STOP NOT ADJACENT TO SCHOOL I- W W '0:: In RESIDENTIAL -MAJOR , TWO WAY sT'6f1 ' NOT ADJACENT TO SCHOOL I , : 1-: .j WI I WI : . 0::; , 1-, I CI}' , , . . )1,: v I ' K, ' , ' I ' . . . , , i ~ i . , I , , \" dc. d A . -- -----.'---- __n_ - -_'.. r1 .._un.___ ____ __ __ _._. RESIDENTIAL . I: ~. . " ~I. . STREET --------:XP---.---.c~-~~ _ _ _ ..".- - ___u_~___ ---.--- B'';" - -/0 - , . B , ' I ' I 1 , I , ' I : ,. 10- :0:: I~' I~ ,K 1<( I I~ ' I , I I 1 , , \ . '.dB qA, t r-.---.--.- ----.-----. 'I~' II ~ il STREET .------.-i:p--------O"~~- - _is-~------n- u___.___.--..--- '-- , .1, I~ I ' , ' , , , , , : '.J , 1<( ~Q 1- 'II II- I iZ I, iW I '0 , 1- I ,CI} I ,W I ,0:: , , . 29 I I I I I I I I I I I I .. I . . I I I I MAJOR- MAJOR FOUR WAY STOP NOT ADJACENT TO SCHOOL I , I I , , , , , A 0" I i , , I , 1- C I 0' i----..... A . . ;-r----\,dc a .------ ------------'1 I . I )'___~___________'_____u MAJOR' II' I~ . I I II' .' ~I II' STREET' -------------------___~.I . 1.1 _________._____-_______----.u D CD't-------}'- -- A '--- I \ ,.0. I . C I ' I I I ! 1 I 1 : , , I '.0. A r , I I I ! 10::: 1 '0 I " I 1<( I 12 I I I o f-! WI wo, 0::' 1-' If)' MAJOR-MAJOR SIGNALIZED NOT ADJACENT TO SCHOOL , I J-: W' wi 0::' In! I AO '-. I , , , , , B' . I 0;- __ ,.J!? A ___________________ .p.--.-t:- ----fro ,?B . a -'\1- I) .--------------------- MAJOR. II I~ II. fl. . ~I I I I STREET ----------p ---------Boc'1J, ~ _ _ -~ ---- -- ---------,--- A cl(! - "0 . ; B I 1 I I I 1- o .. Q A 30 I 10::: '0 I' 1<( ,2 1 ,1 I ,I I II I I I I I I I I I I I I I il I I I , , , , . . . , , , . I / , MINOR .....,. . , J o ~ JO----------......~ , . , I 10:: :0 lz ,- IL II II I , 1-' wi w' Lr' ~l (I)' , I , -, , " '. , . ..--- --- -- ---- - -- - - --- -------- ... -..- ------------------ - - ------ --...... /' . CD " I , \ J N K o SCHOOL , , ~: WI W: 0::: Ini I \ , de ''''--- -- I I B: I 0' , ,----- L__-' , 'a , 'B , , , 1 , PROPERTY I 10:: :0 IZ I- lL '/ 31 '~ I, I , I , I , I I , I , I , , I , ' I , I I e I 1.0 I o ," ~J I """""----. / , , I "0 ...~-- --i-",08 . ~ QJ ~/ i,.lINOR----- I ['----------~-----------:-~::---. III, '" ' I . ' ~,------ -- -- - - - - -::- -:'" - - -- -- -cD", erg MID BLOCK CROSSING \) : AND SCHOOL ZONE . , I I 'Q IA . . " __~n\~J:I , . I , , , , , , . 1 . , I '. I \'- .de " dA ....-------- ~ ~',~"!:~~~"[- ,. . , . . i I I , I I '0 I; K II I I I I I ,I II II I I I I I I I I I I I AI:> -----.--.. -"'" A ~O I I o o o . . . , . CO 01 I / , MINOR ~ JP-------.-- -......, . , J' '0' ,I I I I I , I , o I , , . I ---..---.--... I , I " ~ MINOR 1 J,K 01 " I , ~: I UJ' I orl : f-lf): : o I , . , I 1-. OB 'CjJ " l- - - - - . - - - - . - - ,- - - - - - - - -. -.. - ' I I ' II i L)- '. -- -- ---- m. ~ - --- - - --- _H 'co'-, ~ \ ;0 '\ 'c , I , I , o " I , I I I : SCHOOL , I I I I , , I , /-: UJ: UJ' or' 1-: If)t , \ -,_.~c OA ....__ - _.~__~ .-0 , ., , I 1 B I 0___.1 I I '--'Q , I B 1 I 1 I I I o o I I I , , I , , PROPERTY ~2 ~ __~T8~~T _. . I I , I i.o. 'J . . I ~. . I 1" OB ' CjJ / r.. - - --, -~. -. - --.-, ... - - - -_.~ n...' I, ~.,.,II JP .n._.. - 'S"T - _~b.L------ ---- --,-... ----- 'CO"- I ;;- - Ps MID BLOCK CROSSING \ i : AND SCHOOL ZONE : cr ig5 : :0 I It., ,2 i' !<( 12 :0 12 A I I " I , I I , I I 1 , , , '.... ~': _ . __ uClA ~ STREET ...------------ , , . . . I I I I I I '0 j, . ~. ST "ANDARD SIGNALIZED . / AA ~ . INTERSECTION t..-.-..]"o ,I I- ~I t1 J STOP B R I I I I I I I I I I MAJOR I 1\. . :AA I I I II I 0:: ;'b n. ~ (f) ~ ..J ~ (f) (f) ~ o (0 6' CROSSWALK SOLiD YELLOW PAINTING ON CURB T o C\1 /"~,iO- . ./ fd~"'\. 'iO-" ~:~., ~'rr 1- _ _ I I ~. ,. .. = I--~ -20'-1 0... ~ STREET . STOP BAR ~I 2 33 , /-'. ~AA ~--,----.. ~ I. I PUSH BUTTON TRAFFIC SIGNAL (AT MID-BLOCK) I I I I I I I I I I I I I I II ;1 I II 'I I o o ~ I- W W 0:: tn SIDP BAR.T i;t "0:: o J <( :2 " 34 SOLID YELLOW PAINTING ON CURB b '_, o I 1 I ;1 \" 1 1 1 1 1 1 1 I ~INOR I ~I PUSH BUTTO N TRAFFIC . SIGNAL CAT INTERSECTION) I 1 I I I I I I .. ----0- TOP BAR 't I. I~ w w a:: ~ (j) CROSSWALK 6' DONT WALK I WALK I 0: ca ll. ~ r 2 I SOLID YELLOW PAINTING ON CURB ~ -20:'-/ m n. ~ V) STREET ~ "- STOP BAR . 35 0::/ o J <( 21