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Joint I / Transportation I Research 1 I Program JTRP FHWA/IN/JTRP-98/19 FinalReport TheDevelopmentofaSpeedMonitoringProgram forIndiana DarrenL.Jorgenson KumaresC.Sinha April2000 Indiana Department of Transportation Purdue University FinalReport FHWA/IN/JTRP-98/19 THEDEVELOPMENTOFASPEEDMONITORINGPROGRAMFORINDIANA DarrenL.Jorgenson GraduateResearchAssistant and Kumares C. Sinha OlsonDistinguishedProfessor SchoolofCivilEngineering PurdueUniversity JointTransportationResearchProgram ProjectNo: C-36-10F FileNo: 8-3-6 PreparedinCooperationwiththe IndianaDepartmentofTransportationand theU.S. DepartmentofTransportation FederalFlighwayAdministration The contents ofthisreportreflecttheviews ofthe authorswhoare responsible forthe facts andthe accuracy ofthe data presented herein. The contents do not necessarily reflect the official views or policiesoftheFederalHighwayAdministrationandtheIndianaDepartmentofTransportation.This reportdoes notconstituteastandard,specificationorregulation. PurdueUniversity WestLafayette,Indiana April2000 TECHNICALREPORTSTANDARDTITLEPAGE 1. ReportNo. 2.GovernmentAccessionNo. 3.Recipient'sCatalogNo. FHWA/IN/JTRP-98/19 4.TitleandSubtitle 5. ReportDate April2000 TheDevelopmentofaSpeedMonitoringProgramforIndiana SupplementalReport 6. PerformingOrganizationCode 7.Author(s) 8. PerformingOrganization ReportNo. DarrenJorgensonandKumaresSinha FHWA/IN/JTRP-98/19 9. PerformingOrganizationNameandAddress 10.WorkUnitNo. JointTransportationResearchProgram 1284CivilEngineeringBuilding PurdueUniversity WestLafayette,Indiana 47907-1284 11. ContractorGrantNo. SPR-2150 12.SponsoringAgencyNameandAddress 13.TypeofReportandPeriodCovered IndianaDepartmentofTransportation StateOfficeBuilding FinalReport 100NorthSenateAvenue Indianapolis,IN46204 14.SponsoringAgencyCode 15.SupplementaryNotes PreparedincooperationwiththeIndianaDepartmentofTransportationandFederalHighwayAdministration. 16. Abstract FromthepassageoftheNationalMaximumSpeedLimit(NMSL)of55mphin1974throughitsrepealin 1995speedmonitoring programshavebeenmandatedbythefederalgovernment. Thespeed-monitoringprogramwasprimarilyintendedtoprovidereliabledata tobeincludedasapartoftheState'sannualcertificationinordertobeapprovedforFederalAidhighwayprojects. Therepealofthe NMSLin 1995notonlyauthorizedstatestosettheirownspeedlimits,italsoallowedstatestodeveloptheirownspeedmonitoring programs. Thegoalofthisresearchistoprovidetheframeworkforaspeed-monitoringprogramtomeettheneedsofagenciesand organizationsthatusespeed-monitoringdataintheStateofIndiana. Aproposedspeedmonitoringplanisdevelopedwhichdistributes speedmonitoringstationstohighwayclassesaccordingtothreeprimarycriteria:spatialdistribution,crashdistribution,anddistributionof dailyvehiclemilestraveled. Theproposedspeed-monitoringprogramwillutilize38existingspeed,weigh-in-motion,andautomated trafficrecordingstations. Thestationswillbemonitoredfourtimesayearfora24-hourperiod. Furthermore,theproposedprogramwill monitorspeedsbasedonvehiclelength.ItistherecommendationofthisresearchthatIndianaphaseintheproposedspeed-monitoring plandevelopedinthepresentresearch,duringthe1999calendaryear. Theimplementationshouldincludeavisualinspectionofallthe WTM,ATR,andspeedmonitoringstationslistedinAppendixAtoensuretheyarestillcapableofmonitoringspeedsbyvehicleclassand traveldirection. Ifanyproblemsshouldarisewiththeexistingstations,thatstationshouldbesubstitutedforanotherstationwithinthat districtandhighwayclass. Thisreportisasupplementalreporttothemainreportofthestudy,FHWA/IN/JTRP-99/14,whichwillbepublishedinDecember1999. 17. KeyWords 18.DistributionStatement MpraoxduicmtiuvmitSypeedLimit,statehighwaynetwork,Indiana,safety, NNaotiroensatrlicTteicohnsn.icTahliIsndfoorcmuamteinotniSseravviaciel,ablSeprtiongtfhieelpdu,blVicAth2r2o1u6g1hthe 19.SecurityClassif.(ofthisreport) 20.SecurityClassif.(ofthispage) 21.No.ofPages 22.Price Unclassified Unclassified 80 FormDOTF1700.7(8-69) Digitized by the Internet Archive in 2011 with funding from LYRASIS members and Sloan Foundation; Indiana Department of Transportation http://www.archive.org/details/developmentofspeOOjorg TABLE OF CONTENTS Page LISTOFTABLES 5 LISTOFFIGURES 7 Chapter 1 INTRODUCTION 8 1.1BackgroundInformation 8 1.2MeasurementofTrafficSpeed 9 1.2.1 Background 9 1.2.2SpotSpeed 10 1.2.3 SpaceSpeeds 11 1.3 UseofSpeedMonitoringData 14 1.4ScopeofPresentStudy 16 1.5OrganizationofReport 17 Chapter2REVIEWOFCURRENTPRACTICES 18 2.1 EvolutionofSpeedMonitoringinIndiana 18 2.2SpeedMonitoringPracticesinOtherStates 25 2.2.1 Background 25 2.2.2SurveyDevelopment 25 2.2.3 SurveyAdministration 27 2.2.4StateSurveyResults 28 2.2.4.1 Speed-MonitoringCharacteristics 28 2 2.2.4.2 SiteDistributionDeterminants 29 2.2.4.3 Distribution byHighwayClass 30 Chapter3 IDENTIFICATION OFSPEED MONITORINGNEEDS ININDIANA 34 3.1 PreliminaryInvestigation 34 3.2 SurveyProcedure 35 3.2.1 SurveyDevelopment 35 3.2.2SurveyAdministration 36 3.2.3 SurveyResults 38 3.2.3.1 GeneralSpeedMonitoring 38 3.2.3.2 SiteDistribution 38 3.2.4Conclusions 40 Chapter4PROPOSEDMONITORINGPLAN 41 4.1 Introduction 41 4.2OverviewoftheProposedMonitoringProgram 41 4.3NumberofMonitoringSessionsPerYear 42 4.3.1Background 42 4.3.2StatisticalMethodology 43 4.3.3Results 44 4.4DurationofMonitoringPeriodforIndividualSamplingSessions55 4.4.1 Background 55 4.4.2StatisticalMethodology 56 4.4.3Results 57 4.5SpeedbyDirection 59