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MINOR STREET. ONE OF TWO
CONDITIONS SHOULD BE
SATISFIED FOR THE WARRANT
TO BE SATISFIED.
ITEM #11: MINIMUM
PEDESTRIAN VOLUME
THIS WARRANT IS
SATISFIED WHEN THE PEDES-
TRIAN VOLUME CROSSING THE
MAJOR STREET ON AN
AVERAGE DAY IS AT LEAST 100
FOR EACH OF ANY FOUR
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HOURS OR 190 OR HIGHER
DURING ANY ONE HOUR AND
THERE ARE FEWER THAN 60
GAPS/HR THAT ARE ACCEP-
TABLE BY PEDESTRIANS FOR
CROSSING. IN ADDITION, THE
NEAREST TRAFFIC SIGNAL
ALONG THE MAJOR STREET
SHOULD BE AT LEAST 300 FT
AWAY FROM THE PROPOSED
INTERSECTION, UNLESS THE
INSTALLATION OF THE
PROPOSED TRAFFIC SIGNAL
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WILL NOT NEGATIVELY IMPACT
THE PROGRESSION OF
TRAFFIC.
ITEM #12: SCHOOL CROSSING
THIS WARRANT IS USED
WHEN THE MAIN REASON FOR
INSTALLING A TRAFFIC SIGNAL
CONTROL IS TO ACCOM-
MODATE THE CROSSING OF
THE MAJOR STREET BY
SCHOOLCHILDREN. WHEN AN
ANALYSIS OF GAP DATA AT AN
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ESTABLISHED SCHOOL ZONE
SHOWS THAT THE FREQUENCY
OF OCCURRENCE OF GAPS
AND THE LENGTHS OF GAPS
ARE INADEQUATE FOR SAFE
CROSSING OF THE STREET BY
SCHOOLCHILDREN, THIS
WARRANT IS APPLIED.
ITEM #13: COORDINATED
SIGNAL SYSTEM
THIS WARRANT MAY
JUSTIFY THE INSTALLATION OF
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TRAFFIC LIGHTS AT AN
INTERSECTION WHERE LIGHTS
WOULD NOT OTHERWISE HAVE
BEEN INSTALLED, BUT THE
INSTALLATION WILL ENHANCE
THE PROGRESSIVE MOVEMENT
OF TRAFFIC ALONG A
HIGHWAY SEGMENT WITH A
COORDINATED TRAFFIC-
SIGNAL SYSTEM.
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ITEM #14: CRASH EXPERIENCE
THIS WARRANT IS USED
WHEN THE PURPOSE OF
INSTALLING A TRAFFIC SIGNAL
CONTROL IS TO REDUCE THE
NUMBER AND SEVERITY OF
CRASHES AT THE INTER-
SECTION. THIS WARRANT
JUSTIFIES SIGNALIZATION OF
AN INTERSECTION WHEN
CRASH FREQUENCY HAS NOT
BEEN REDUCED BY AN
ADEQUATE TRIAL OF LESS
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RESTRICTIVE MEASURES. IT
STIPULATES THAT THE USE OF
TRAFFIC SIGNALS IS WAR-
RANTED AT AN INTERSECTION
IF FIVE OR MORE INJURY OR
REPORTABLE PROPERTY DA-
MAGE ONLY CRASHES HAVE
OCCURRED WITHIN A 12-
MONTH PERIOD AND THAT
SIGNAL CONTROL IS A
SUITABLE COUNTER MEASURE
FOR THESE CRASHES.
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ITEM #15: ROADWAY NETWORK
THIS WARRANT JUSTIFIES
THE INSTALLATION OF
SIGNALS AT SOME INTER-
SECTIONS WHEN SUCH AN
INSTALLATION WILL HELP TO
ENCOURAGE CONCENTRA-
TION AND ORGANIZATION OF
TRAFFIC NETWORKS. THE
WARRANT CAN BE APPLIED AT
INTERSECTIONS OF TWO OR
MORE MAJOR ROADS WHEN (1)
THE TOTAL EXISTING OR
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IMMEDIATELY PROJECTED
ENTERING VOLUME IS AT
LEAST 1000 DURING THE PEAK
HOUR OF A TYPICAL WEEKDAY
AND (2) THE FIVE-YEAR
PROJECTED TRAFFIC VO-
LUMES, BASED ON AN
ENGINEERING STUDY.
ITEM #16: OBJECTIVES OF
EVALUATION
THE OBJECTIVE OF AN
EVALUATION IS TO FURNISH
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THE APPROPRIATE INFOR-
MATION ABOUT THE OUTCOME
OF EACH ALTERNATIVE SO
THAT A SELECTION CAN BE
MADE. THE EVALUATION
PROCESS SHOULD BE VIEWED
AS AN ACTIVITY IN WHICH
INFORMATION RELEVANT TO
THE SELECTION IS AVAILABLE
TO THE PERSON OR GROUP
WHO WILL MAKE A DECISION.
AN ESSENTIAL INPUT IN THE
PROCESS IS TO KNOW WHAT
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INFORMATION WILL BE
IMPORTANT IN MAKING A
PROJECT SELECTION.
ITEM #17: IDENTIFYING
PROJECT STAKEHOLDERS
A TRANSPORTATION
PROJECT CAN AFFECT A
VARIETY OF GROUPS IN
DIFFERENT WAYS. IN SOME
INSTANCES, ONLY ONE OR A
FEW GROUPS ARE INVOLVED;
IN OTHER CASES, MANY
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FACTIONS HAVE AN INTEREST.
EXAMPLES OF GROUPS THAT
COULD BE AFFECTED BY A
TRANSPORTATION PROJECT
INCLUDE THE SYSTEM USERS,
TRANSPORTATION MANAGE-
MENT, LABOR, CITIZENS IN THE
COMMUNITY, BUSINESS, AND
LOCAL, STATE, AND NATIONAL
GOVERNMENTS.
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ITEM #18: SELECTING AND
MEASURING EVALUATION
CRITERIA
A TRANSPORTATION
PROJECT IS INTENDED TO
ACCOMPLISH ONE OR MORE
GOALS AND OBJECTIVES,
WHICH ARE MADE OPE-
RATIONAL AS CRITERIA. THE
NUMERICAL OR RELATIVE
RESULTS FOR EACH CRITERIA
ARE CALLED MEASURES OF
EFFECTIVENESS. CRITERIA SE-
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LECTION IS A BASIC ELEMENT
OF THE EVALUATION PROCESS
BECAUSE THE MEASURE USED
BECOMES THE BASIS ON
WHICH EACH PROJECT IS
COMPARED.
ITEM #19: MEASURES OF
EFFECTIVENESS
ONE APPROACH IS TO
CONVERT EACH MEASURE OF
EFFECTIVENESS TO A COM-
MON UNIT, AND THEN, FOR
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EACH ALTERNATIVE, COMPUTE
THE SUMMATION FOR ALL
MEASURES. A COMMON UNIT
IS MONEY, AND IT MAY BE
POSSIBLE TO MAKE A
TRANSFORMATION OF THE
RELEVANT CRITERIA TO
EQUIVALENT DOLLARS AND
THEN COMPARE EACH
ALTERNATIVE FROM AN
ECONOMIC POINT OF VIEW. A
SECOND APPROACH IS TO
CONVERT EACH MEASURE OF
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EFFECTIVENESS TO A
NUMERICAL SCORE.
ITEM #20: EVALUATION
PROCEDURES AND DECISION
MAKING
THE DECISION MAKER
TYPICALLY NEEDS TO KNOW
WHAT THE COSTS OF THE
PROJECT WILL BE; IN MANY
INSTANCES, THIS ALONE WILL
DETERMINE THE OUTCOME.
ANOTHER QUESTION MAY BE,
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DO THE BENEFITS JUSTIFY THE
EXPENDITURE OF FUNDS FOR
TRANSPORTATION, OR WOULD
THE MONEY BE BETTER SPENT
ELSEWHERE? THE DECISION
MAKER ALSO WILL WANT TO
KNOW IF THE PROPOSED
PROJECT IS LIKELY TO
PRODUCE THE STATED
RESULTS.