16.1Introduction

Capacityevaluationmoduleallowyoutocheckyourintersectionperformanceunderthepre-definedtrafficcontrolconditions.OpentheCapacityevaluationmoduleandfollow5stepsprocedureinordertoachievefinalresults.

Figure273:Capacityevaluationbutton

ThewholeITCconfigurationhastobereadyandpreparedwithusingthegraphicalinterface-see:ITCconfigurationsection4.1page18

Figure274:ITCconfiguration-graphicalmode

16.2Step1-Intersectionlayout

Definethelayoutoftheintersection:numberoflegs,trafficlanes,approaches,departuresetc.

Figure275:Intersectionlayout

16.2.1Numberoflegs

Definethenumberoflegs:

_{Figure276:Numberoflegs}

16.2.2Numberofapproaches/departures

Definethenumberofapproachesanddeparturesasyouseeitonthejunction,

Figure277:Numberofapproaches/departures

16.2.3Trafficlanesandmovements

Definethedirectionsandthesignalgroupassociations.3,5misadefaultlanewidthandcanbechanged.

Figure278:Numberoflegs

16.2.4Approachgrade

Definetheapproachgradeforeachleg.

Figure279:Approachgrade

16.2.5Pedestriancrossing

Locatethepedestriancrossings(choosethedistanceCandthesignalgroupassociation):

Figure280:Pedestriancrossing

16.2.6Turningradius

Turningradiusmightinfluencethefinalresults.Itisaswellimportanttoclarifyvaluesastheyareonsite.

Figure281:Approachgrade

16.3 Step2-Trafficflows

DefinethetrafficflowandHGVratioaccordingtoyourtrafficstudies.Itispossibletodeclarefewdifferentperiods.

Figure282:Trafficflows

16.4 Step3-Saturationflow

ChecktheSaturationflowevaluationandmodifyspecificfactorsifnecessary:

Figure283:Saturationflow

UseGlossarytocheckthemeaningofeachfactor.

Figure284:Help

16.5 Step4-Results

ResultsgroupedontheStep4presentthetrafficconditionsoneachlanegroup.

Figure285:Lanegroupresults

UseGlossarytocheckthemeaningofeachvalueresult.

Figure286:Help2

16.6 Step5-Results

Resultsonthestep5presenttheoverallintersectionperformance.Valuesarepresentedforeachlegandforthewholejunctionbothintabularandgraphicalway:

Figure287:Lanegroupresults

Youcanalsovisualizeseparateresultsonthesignalgroupplan.Heareachsinglegreenorcycletimemodificationimpactoftheresulton-line:

Figure288:CapacityevaluationresultsinPlans

17 APPENDIXV-Intersectiondocumentation

YoucancreateadocumentfromyouITCconfiguration.SelectReportsfunctionfromtheMain

Menubarandchooseyourpreferabletemplatefromthelist:

Figure289:MainmenuReportfunction

Modifyandsaveyourowntemplatefileswhichcanbefoundin.Work¿WordTemplatesfolder:

Figure290:MainmenuReportfunction

18EXAMPLEI

18.1Intersectionlayout

Theinteractionhas6vehiclegroups(G1,G2,G3,G4,G5andG6)and3pedestriangroups(P1,P2,P3).

Thereare4loopdetectors(D1,D2,D3,D4)onthemainroadand4videodetectorsonthesideroads(C1,C2,C3,C4).Videodetectorsconnectstothedigitalinputterminal.Thepedestrianpushbuttons(P1,P2,P3)connectstotheAux/Red2.

Figure291:Intersectionlayout

TheStageSequencecontainsbothmainandalternativestages(A,B1,B2,C,DandE).

18.2 Step1Intersectionlayout

Firstswitchthegraphicalmodeandtypetheintersectionname,BackplaneID,numberofsignalgroups,plansetc.

_{See:QuickStartViewbuttonsection3.5page17}

Figure292:STEP1

See:STEP1-Intersectionlayoutsection4.1page18

18.3 Step2Signalgroups

ClickSTEP2buttonanddecidethesignalgroupsname,typeandmingroupsequence.

Figure293:STEP2

See:STEP2-Signalgroupssection4.3page25

18.4 Step3Conflicts

Fillintheintergreentimematrixwiththevaluesfromthetrafficdesign.Valuesshouldalwaysconsiderthelocaltrafficregulations,speedanddistances.

Figure294:STEP3

See:STEP3-Minimumintergreentimematrixsection4.4page29

18.5 Step4Conflictinggroupnumbers

TablefromSTEP4containsconflictinggroupnumbers

Figure295:STEP4

See:STEP4-Signalgroupconflictssection4.4page31

18.6 Step5Start-upsequence

Choosestart-upsequencesfromthelist-differentforthevehicleandpedestriansignalgroups.

Figure296:STEP5

See:STEP5-Intersectionstart-upsequencesection4.6page32

18.7 Step6Generalplanprogramming

Makethesignalplans”isolatedtype”anddecidethestar-upandreststage.Tolearnmoreabout:

-start-upstagedefinitionsee:Start-upstagesection4.7.3page34

_{-reststagedefinitionsee:Reststageprogrammingsection6.1.1page89}

Figure297:STEP6

See:STEP6-Generalplanprogrammingsection4.7page33

18.8 Step7Lampsupervisionprogramming

See:STEP7-Lampsupervisionsection4.8page36

18.9 Step8Intergreentimematrix

TheIntergreentimemarixfromSTEP8usuallycontainsbothphysicalandlogicalconflicts-moreaboutlogicalconflictsinsection4.9.2page41

Figure298:STEP8

See:STEP8-Physicalandfictiveintergreentimematrixsection4.9page40

18.10Step9Generalplanprogramming

Theplandrawingrepresentsthetrafficdesign.Ifyourtrafficdesigncontainsonlythetabularrepresentationofthegreentimes,youcandrawitonyourownhereinSTEP9.WhenthedrawingplanstructureinSTEP9,considerboththegreentimesandstagesequence.

Figure299:STEP9

Hereyoushouldconsiderthemainstagesonly.Don’tdrawanyalternativestageshere.HowitisdecidedthatthestageB2isamainstageandtheB1isanalternativeone?

Simply,ifwemadetheB1mainstagethengroupsP8andP9wouldnevergetgreenasthesegroupsdon’tbelongtoanyotherstagebutonlytoB2.ThatiswhytheB2stageisamainstage.AndonlyiftheP8eitherP9isnotrequesting,controllercancreatethealternativestageB1,withtheleftturnG4greentwotimes,instageB1andE2.

See:STEP9-Trafficplansprogrammingsection4.10page43

18.11Step11Stagesequence

TheStageSequenceusuallycontainsprogrammingformainstagesonly.Youdon’thavetoprogramthealternativestageshere.Alternativestageswillbecreatedbythecontrollerauto-matically,followingsomeadditionalrulesprogrammedintheDetectorLogic.

Figure300:STEP11

See:STEP11-Stagelogicprogrammingsection4.12page55

18.12Step13Loopdetectorhardwareprogramming

Thesoftwaregeneratesthedefaultloopdetectorhardwareprogramming.

Figure301:STEP13

See:STEP13-Loopdetectorssection5.1page66

18.13 Step14DetectorLogic

TheDetectorLogicprogramminglinksloopandvideodetectorswithvehiclegroups:

Figure302:STEP14-loopdetectorsanddigitalinputs

TheDetectorLogicprogramminglinksthepushbuttoninputswithpedestriansignalgroups:

Figure303:STEP14-pushbuttons

See:STEP14-DetectorLogicssection5.2page68

18.14Step10SequenceLogicprogramming

Pressthe”vehicleactuated”buttonandchangethedefaultfixedtimesettingstovehicleac-tuated.

Figure304:STEP10

YoucanalsoaddSequenceLogicinSTEP1,makeitfixedtimeplanandassociatewithPlan3.Thiswayfirsttwoplanswouldremainsvehicleactuatedandthelastonefixedtimeplan(backupplan).

Figure305:STEP10-addingSequenceLogic

See:STEP10-SequenceLogicsection5.3page83

18.15Step14Additionalconditions

Thesampledtrafficlogicrequiressomeadditionalconditions:whenP9requests,P8shouldgetgreentoo(evenifnotrequesting).ForthisandothertrafficconditionswecanusetheDetectorLogic.

First,findemptyDetectorLogic.ItisagoodruletoleaveoneDetectorLogicemptyinordertodistinguish”physicalinputdetectors”from”logicalinputdetectors”.InthefollowingexamplethatwouldbeDL15.

Choosethesignalgroupnumberfromthelist(1)-signalgroupthatwillbeinfluencedbyDL15.

Andchoosetheinputdefinitionfromthewindow(2)-whenP9isgreen,thenrequestforgreen

inP8.

Tolearnmoreaboutdifferenttypesofinputssee:Otherinputtypessection5.2.12,page79

Figure306:STEP14-additionalDL

Tolearnmoreaboutdifferenttypesofinputssee:Otherinputtypessection5.2.12,page79.

19 EXAMPLEII

19.1 Intersectionlayout

Theinteractionhas8vehiclegroups(V1,V2,V3,V4,V5,V6,V7andV8).

Thereare6loopdetectors(D1,D2,D3,D4,D5,D6)and2videodetectorsondirectionV4(C1,C2).Videodetectorsconnecttothedigitalinputterminal.

Figure307:Intersectionlayout

TheStageSequencecontainsboththemainstagesandsubstagesstages(A,B,C,D,E,F).

19.2 Step1Intersectionlayout

Firstswitchthegraphicalmodeandtypetheintersectionname,BackplaneID,numberofsignalgroups,plansetc.

Theconfigurationcontainsone”dummysignalgroup”(nonphysicalgroup9).Thatiswhythereare9signalgroupsprogrammedintextedit(1)and1dummygroup-textedit(2).

Figure308:STEP1

See:STEP1-Intersectionlayoutsection4.1page18

19.3 Step2Signalgroups

ClickSTEP2buttonanddecidethesignalgroupsname,typeandmingroupsequence.Thelastsignalgroupisa”dummygroup”(nonphysicalgroup9)-seelabel(1)

Figure309:STEP2

See:STEP2-Signalgroupssection4.3page25

19.4 Step3Conflicts

Fillintheintergreentimematrixwiththevaluesfromthetrafficdesign.Valuesshouldalwaysconsiderthelocaltrafficregulations,speedanddistances.

A”Dummygroup”(group9)doesn’tneedtobeprogrammedforanyphysicalconflicts.

Figure310:STEP3

See:STEP3-Minimumintergreentimematrixsection4.4page29

19.5 Step4Conflictinggroupnumbers

TablefromSTEP4containsconflictinggroupnumbers

Figure311:STEP4

See:STEP4-Signalgroupconflictssection4.4page31

19.6 Step5Start-upsequence

Choosestart-upsequencesfromthelist-differentforthevehicleandpedestriansignalgroups.A”Dummygroup”(group9)staysdarkinallthreestart-upintervals.

Figure312:STEP5

See:STEP5-Intersectionstart-upsequencsection4.6page32

19.7 Step6Generalplanprogramming

Makethesignalplans”isolatedtype”anddecidethestar-upandreststage.Tolearnmoreabout:

-start-upstagedefinitionsee:Start-upstagesection4.7.3page34

_{-reststagedefinitionsee:Reststageprogrammingsection6.1.1page89}

Figure313:STEP6

See:STEP6-Generalplanprogrammingsection4.7page33

19.8Step7Lampsupervisionprogramming

See:STEP7-Lampsupervisionsection4.8page36

19.9Step8Intergreentimematrix

TheIntergreentimemarixfromSTEP8usuallycontainsboththephysicalandlogicalconflicts-moreaboutlogicalconflictsinsection4.9.2page41

Figure314:STEP8

”Dummygroup”(group9)isinconflictagainstall”external”vehiclegroups(V1,V2,V3,V4).Thiswaythe”clearingstage”canbeeasilydefinedinSTEP10.Whenever”dummygroup”getsgreenitisaclearingstagebecausenonother”external”vehiclegroupscanremaingreentogetherwith”dummygroup”.Onlythe”internal”vehiclegroups(V5,V6,V7,V8)canbegreentogetherwith”dummygroup”(group9).

See:STEP8-Physicalandfictiveintergreentimematrixsection4.9page40

19.10Step9Generalplanprogramming

Theplandrawingrepresentsthetrafficdesign.Ifyourtrafficdesigncontainsonlythetabularrepresentationofthegreentimes,youcandrawitonyourownhereinSTEP9.WhendrawingplanstructureinSTEP9,considerboththegreentimesandstagesequence.

Thesampleplanisbasedonusingmaxgreentimein”external”groups(V1,V2,V3,V4)andoverlapping(passivegreen)for”internal”groups(V5,V6,V7,V8).Thankstothepassivegreenplangetsitsflexibility.Itissufficientenoughtomodifythegreentimeinanyoftheexternalgroups,inordertomaketheinternalgroupsfollowingthemodificationsrightaway.

Figure315:STEP9

See:STEP9-Trafficplansprogrammingsection4.10page43

Programmingforthe”internal”signalgroups(V5,V6,V7,V8)shouldbebasedonoverlapping

(passivegreen):

See:Requestingwithstageandoverlappingsection6.2.2page92

19.11 Step11Stagesequence

Clearingstageoccurstwiceinacycle(stage3and6).Clearingstagesarebasedona

”dummygroup”(group9)whichisinconflictwithall”external”signalgroups.

Figure316:STEP11

See:STEP11-Stagelogicprogrammingsection4.12page55

19.12 Step13Loopdetectorhardwareprogramming

Thesoftwaregeneratesthedefaultloopdetectorhardwareprogramming.

Figure317:STEP13

See:STEP13-Loopdetectorssection5.1page66

19.13 Step14DetectorLogic

TheDetectorLogicprogramminglinksloopandvideodetectorswithvehiclegroups:

Figure318:STEP14

See:STEP14-DetectorLogicssection5.2page68

19.14 Step10SequenceLogicprogramming

Pressthe”vehicleactuated”buttonandchangethedefaultfixedtimesettingstovehicleac-tuated.

Figure319:STEP10

See:STEP10-SequenceLogicsection5.3page83

19.15Step14Additionalconditions

Thesampletrafficlogicrequiressomeadditionalconditions:clearingstage3shouldberequestedonlyifbothV1andV2wererequestinggreen.Clearingstage6shouldoccuronlyifbothV3andV4wererequestinggreen.

FirstfindemptytheDetectorLogic.ItisagoodruletoleaveoneDetectorLogicemptyinordertodistinguish”physicalinputdetectors”from”logicalinputdetectors”.InthefollowingexamplethatwouldbeDL10.

Choosethesignalgroupnumberfromthelist(1)-signalgroupthatwillbeinfluencedbyDL10.

Andchoosetheinputdefinitionfromthewindow(2)-Specialdetector1.

Clickonthe”ShowSpecialdetectorfunctionpage...”linkinordertodefinetheSpecialdetector1.

Figure320:STEP14-additionalDL

Tolearnmoreaboutdifferenttypesofinputssee:Otherinputtypessection5.2.12,page79.

Clickonthe”INPUTdefinitionA”button(1),choosethe”Groupstatus”inputtypepage(3)

anddefinetheinputasactivewhengroup1”hasrequestinred”.

Clickonthe”INPUTdefinitionB”button(1),choosethe”Groupstatus”inputtypepage(3)

_{anddefinetheinputasactivewhengroup2”hasrequestinred”.}

Figure321:SpecialDetectorprogramming

WhenbothinputsAandBaredefined,choosethespecialdetectorlogicfunction(AND,OR

etc).

Intheexamplebelowitisgoingtobefunction6(AND)-whengroup1”hasrequestinred”

ANDgroup2”hasrequestinred”-Specialdetector1remainsactive.

Figure322:Specialdetectorfunction

WhenSpecialDetector1remainsactive,DL10requestsforgreenfor”dummygroup”(group9)

inordertoactivatethe”clearing”stage3.

WhenSpecialDetector2remainsactive,DL11requestsforgreenfor”dummygroup”(group9)

inordertoactivatethe”clearing”stage6.

Figure323:Specialdetectorinputtype

Ifanyadditionalconditionsarerequiredyoucanalwaysuse”EnableINPUTdefinition”inthe

DetectorLogicprogramming.Forexample:

DL10shouldbeonlyconsideredwhencurrentstagenumberissmallerorequal3.DL11shouldbeonlyconsideredwhencurrentstagenumberisgreaterorequal3.

Inordertodefineanyadditionalconditions,clickonthe”EnableINPUTdefinition”buttonandchoosethespecificinput(condition).

Figure324:EnableINPUTdefinition

Tolearnmoreaboutdifferenttypesofinputssee:Otherinputtypessection5.2.12,page79.