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  • Idaho Traffic Crashes

    2015

    Idaho Transportation Department

    Office of Highway Safety

  • IDAHOTRAFFICCRASHES

    2015

    PreparedbytheIdahoOfficeofHighwaySafety

    IDAHOTRANSPORTATIONDEPARTMENTP.O.Box7129

    Boise,Idaho837071129(208)3348100

    IdahoHighwaySafetyWebAddress:http://www.itd.idaho.gov/ohs

  • -i-

    TableofContents PageINTRODUCTION................................................................................................................................................................................1

    EXPLANATIONOFDATA................................................................................................................................................................1

    EXECUTIVESUMMARY....................................................................................................................................................................3

    IDAHOSTRAFFICCRASHCLOCK:2015...................................................................................................................................5

    STATEWIDECRASHCATEGORIES...............................................................................................................................................9

    FATALITYANDINJURYRATES...................................................................................................................................................10

    INJURYSEVERITY...........................................................................................................................................................................12

    ECONOMICCOSTOFCRASHES....................................................................................................................................................12

    CRASHESBYNUMBEROFUNITSINVOLVED..........................................................................................................................14

    CRASHESANDINJURIESBYMONTH.........................................................................................................................................17

    CRASHESBYDAYOFTHEWEEK...............................................................................................................................................18

    CRASHESBYTIMEOFDAY..........................................................................................................................................................19

    CRASHESBYROADWAYCLASSIFICATION..............................................................................................................................20

    CRASHESBYIDAHOCOUNTIESANDCITIES..........................................................................................................................22

    DRIVERAGEDISTRIBUTION.......................................................................................................................................................29

    DRIVERAGEANDCRASHINVOLVEMENT...............................................................................................................................30

    DRIVERGENDERINFORMATION...............................................................................................................................................31

    CRASHINVOLVEMENTBYDRIVERAGEANDGENDER.......................................................................................................32

    CONTRIBUTINGCIRCUMSTANCESINCRASHES....................................................................................................................33

    TRAFFICVIOLATIONSANDDRIVERSLICENSESUSPENSIONS.........................................................................................34

    IMPAIREDDRIVING.......................................................................................................................................................................39

    ECONOMICCOSTSOFIMPAIREDDRIVINGCRASHES .................................................................................................................. 40VICTIMSOFFATALCRASHESINVOLVINGIMPAIREDDRIVERS .................................................................................................... 40IMPAIREDDRIVINGBYAGE ................................................................................................................................................... 41IMPAIREDDRIVINGBYCOUNTIESANDCITIES ......................................................................................................................... 42

    SAFETYRESTRAINTUSAGE........................................................................................................................................................46

    OBSERVATIONALSEATBELTSURVEYRESULTS ....................................................................................................................... 47SELFREPORTEDSEATBELTUSAGERESULTS ......................................................................................................................... 49COSTSOFINJURIESBYSAFETYRESTRAINTUSE ....................................................................................................................... 49LOCALSAFETYRESTRAINTUSAGE ......................................................................................................................................... 50CHILDSAFETYSEATUSAGEBYAGEGROUPS .......................................................................................................................... 52CHILDSAFETYSEATSELFREPORTEDUSAGE ....................................................................................................................... 53

    AGGRESSIVEDRIVING...................................................................................................................................................................54

    INVOLVEMENTINAGGRESSIVEDRIVINGCRASHESBYDRIVERAGE ............................................................................................ 55DISTRACTEDDRIVING..................................................................................................................................................................56

    YOUTHFULDRIVERS.....................................................................................................................................................................58

    EMERGENCYMEDICALSERVICES..............................................................................................................................................59

    PEDESTRIANSINCRASHES..........................................................................................................................................................60

    BICYCLISTSINCRASHES...............................................................................................................................................................61

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    MOTORCYCLISTSINCRASHES....................................................................................................................................................62

    COMMERCIALMOTORVEHICLESINCRASHES......................................................................................................................63

    MOTORVEHICLECRASHESINWORKZONES........................................................................................................................67

    GLOSSARYOFTERMS....................................................................................................................................................................69

    REFERENCESANDNOTES............................................................................................................................................................71

    APPENDIXA:MAPSOFFATALCRASHLOCATIONSIN2015............................................................................................73

    APPENDIXB:MAPSOFCRASHESWITHWILDANIMALSIN2015..................................................................................85

    APPENDIXC:STATEHIGHWAYSYSTEMCRASHDATA.....................................................................................................89

    APPENDIXD:FIVEYEARCRASHHISTORY..........................................................................................................................109

    APPENDIXE:25YEARHISTORY............................................................................................................................................115

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    IntroductionIdaho Traffic Crashes 2015 provides an annual description of motor vehicle crash characteristics forcrashesthathaveoccurredonpublicroadswithintheStateofIdaho.Thisdocumentisusedbystateandlocal transportation, law enforcement, health, and other agencies charged with the responsibility ofcoping with the increasing costs of traffic crashes. Agencies use the data to identify traffic safetyproblemsandtargetareasforthedevelopmentofcrashreductionandinjurypreventionprograms.Atrafficsafetyproblemisanidentifiablesubgroupofdrivers,pedestrians,vehicles,orroadwaysthatisstatistically higher in crash experience than normal expectations. Problem identification involves thestudyofrelationshipsbetweencrashesandthepopulation,licenseddrivers,registeredvehicles,vehiclemilestraveled,andcharacteristicsofspecificsubgroupsthatmaycontributetocrashes.This document is divided into two major sections: a statewide crash summary and a breakdown ofcrashes by identified problem areas. Maps displaying the approximate location of each fatal crash bytransportationdistrictarefoundinAppendixA.Preciselocationsoffatalcrashescannotbedeterminedfromthemaps.AppendixBisamapofcrasheswithwildanimals.InformationregardingcrashesontheStateHighwaySystemisav

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