Signal Design Section - NCDOT

Signal DesignSectionOJ Design Se

TopicTopicSection Sheet(s)Controller TermsPhasingNumbering of NEMA PhasesPhasing Typicals2-Phase Operation3-Phase Operat ion4-Phase Operat ion5-Phase Operat ion6-Phase Operat ion7-Phase Operat ion8-Phase Operat ionDallas PhasingRed RevertF I ash i ng Ye I low ArrowSignal HeadsGeneral Guidel inesMUTCD RequirementsApproach Displays and A I i gnmentLoopsTypical NumberingLoop PlacementMain Street Thru MovementsPermitted Only Left TurnsExclusive/Permitted Left TurnsExclusive Left TurnsSide Street Thru MovementsSide Street Right TurnsAlternatives in Poor PavementPresence Loops at Stop LinesLoop Wire and Lead-in CalculationsDut-of-Street DetectionSignal Plan ElementsDrawing NotesLoop Chart TypicalsTimingTi mi ng ChartChange/Clearance Intervals1.012.01-42. 1. 12.1.22.1.32.1.42.1.52.1.62. 1.72.22.32.411-21-31-21-311-311-31-23.03. 13.21-61-21-244.014. 1. 14. 1.24.1.34. 1. 44. 1.54. 1. 64. 1. 74. 1. 84.24.31-411-211-31111-21-25.05. 11-41-55.2.15.2.21-61-4Section Sheet(s)Signal Plan Elements (cont.)Volume Density Timing Exa"pleCommon Drawing SymbolsSigna I Face [. D. Detai IsMisc. Drawing Format ItemsPlan Quantity Calculations5.2.35.35.45.55.6Pedestrian Heads &6.017.01-58.08. 11-219.09. 11110.01TimingFlashersSignageCommonly Used SignsLone-Use Contra lSi gnsPavement MarkingsCrosswalksStop LinesPolesStandard Pole PlacementMetal Pole DesignDetermining Elevation DifferencePole Height DeterminationLoading Schedules for Metol Poles10. 1 . 110. 1.210. 1.31-21-31Traffic CountsTraff i c Count Detai Is11.01-3GeometriesTurn Lanes12.01-2PreemptionEmergency Vehicle Pree"ptionRa i Iroad Pree"pt i on13.013. 11-21-10Closed Loop Signal SystemsGeneral I nformafi onMain Street DetectionSide Street Detection14.014. 114.211-21-2Table of Contents12-1011-2111-41-4SIGN AlL DESIGN SECTIONTRANSPORTATION MOBILITY AND SAFETY DIVISIONNORTH CAROlLINA DEIP AR TMENT OF TRANSPORTATIONSTD. NO.

2070L TermNEMA EquivalentCall DetectorDelayDual EntryExtension/GapFull Time DelayMaximum GreenMax RecallMax Variable InitialMinimum GapMin GreenMin RecallPed RecallRed ClearanceSec per ActuationSoft RecallStop Bar TimeStretchTime Before ReductionTime to ReduceVehicle Call MemoryYellow ClearancePlace Call During PhaseDelayDual EntryPassage/GapInhibit Delay During Green?Maximum 1Max RecallMaximum InitialMinimum GapMinimum GreenMin RecallPed RecallRed ClearanceSec per ActuationSoft RecallExtendTime Before ReductionTime to ReduceVehicle Call MemoryYellow Change Interval-------170 EquivalentCallingDelayDouble EntryVehicle ExtensionFull Time DelayMaximum LimitMax RecallMaximum InitialMinimum GapMinimum InitialVehicle RecallPed RecallRed ClearanceAdd per VehicleSoft RecallType 3 LimitCarryReduce 0.1 Sec EveryVehicle Call MemoryYellow Change IntervalAlternate ExtensionCountExtensionMaximum GapController Terms7-04 ISIGNALS &GEOMETRICS SECTIONTRAFFIC ENGINEERING AND SAFETY SYSTEMS BRANCHNORTH CAROLINA DEPARTMENT OF TRANSPORTATIONSTD. NO.1.0SHEET1 OF 1

Standard NEMA OrientationDual Ring CabinetStandard NEMA OrientationSingle Ring 4 Phase Cabinet t 04070403'iLMajor Street 02--F01Major Street0502Y 06 01 Determine main streetphase 2 (see sheet 2)and then proceednumbering clockwiseStandard NEMA OrientationSingle Ring 2 Phase Cabinet03 08Major StreetSum of phases for each major street approach is 7.(1 6 7 and 2 5 7) 02Sum of phases for each minor street approach is 11.(3 8 11 and 4 7 11)Numbering of NEMA Phases7-09ISIGN AL DESIGN SECTIONTRANSPORTATION MOBILITY AND SAFETY DIVISIONNORTH CAROLINA DEPARTMENT OF TRANSPORTATIONSTD. NO.2.0SHEET 1 OF 4

Standard NEMA OrientationDual Ring CabinetMajor Street runs East-WestStandard NEMA OrientationDual Ring CabinetMajor Street runs North-South--1;-CDI!!."'0c:: I!!."0407'-0 j06 01 Major Street0502Y Minor Street06 01 0704Y 03 05 0203 08Phase NumberingPhase NumberingPhase 2 - Eastbound through movementPhase 4 - Southbound through movementPhase 6 - Westbound through movementPhase B - Northbound through movementPair turning movements with the through movementsif an exclusive left turn phase (protected orprotected/permissive) is not used.If location is being added to an existing system,match phase numbering to the system.Phase 2 - Northbound through movementPhase 4 - Eastbound through movementPhase 6 - Southbound through movementPhase B - Westbound through movementPair turning movements with the through movementsif an exclusive left turn phase (protected orprotected/permissive) is not used.If location is being added to an existing system,match phase numbering to the system.Numbering of NEMA Phases7-0908ISIGN AL DESIGN SECTIONTRANSPORTATION MOBILITY AND SAFETY DIVISIONNORTlH CAROLINA DEPARTMENT OF TRANSPORTATIONSTD. NO.2.0SHEET 2 OF 4

Determining Movement Phase NumbersTee IntersectionsDetermining Movement Phase NumbersSplit Side Streets02 Ma·or Street r "0408r04 0605.J'L ·f1 3 r 06-.F0102 1 Phase NumberingMovement numbering will conform to standard NEMAphasing shown on Sheet 1.Phase 2 . Eastbound or Northbound through movementPhase 4 . Southbound or Eastbound Stem of Tee movementPhase 6 . Westbound or Southbound through movementPhase 8 . Northbound or Westbound Stem of Tee movementNOTE: For 2070 SE·PAC, there must be a phase in Ring 1for phase 2 to operate. This means that there mustbe a phase 2 for phase 6 to operate and there mustbe a phase 4 if using phase 8. For Tee intersectionson SE·PAC use phase 4 for the stem of the Tee.Phase NumberingMain street movement numbering will conform tostandard NEMA phasing shown on Sheet 1.For side street movement numbering:·If one approach is desired to be servicedfirst, label it phase 3 and the otherapproach phase 4.·If there is no desire for either approachto be serviced first, label phase 4 for theeastbound or southbound movement and phase 3for the westbound or northbound movement.Numbering of NEMA Phases12-101SIGN AL DESIGN SECTIONTRANSPORTATION MOBILITY AND SAFETY DIVISIONNORTH CAROLINA DEPARTMENT OF TRANSPORTATIONSTD. NO.2.0SHEET 3 OF 4

Determining Superstreet Phase NumbersCross Intersections w"Leftovers"Determining Superstreet Phase NumbersU-Turn Only, Tee, or Unsignalized Right Turns ·iL1 31 3 --,-----7 / 033'-Phase 6 UnsignalizedMajor Street/ I--F/ii-Tum07Phase 2 UnsignalizedPhase NumberingMain street through movement numbering will conformto standard NEMA phasing shown on Sheet 1.Phase NumberingMain street through movement numbering will conformto standard NEMA phasing shown on Sheet 1.For left turn and side street movement numbering:-Phase should be an odd number on the opposite sideof NEMA barrier (3 or 7).-Sum of phases used at a superstreet signal shouldtotal 9 (2 7 9 or 3 6 9).-At a cross, each "pair" of movements should becontrolled by separate controllers and cabinetsto facilitate system coordinationNO signal heads needed for through movement adjacentto left turn movement if there is no signalizedconflicting movment.For left turn movement numbering:-Phase should be an odd number on the opposite sideof NEMA barrier (3 or 7).-Sum of phases used at a superstreet signal shouldtotal 9 (2 7 9 or 3 6 9).-At a cross, each "pair" of movements should becontrolled by separate controllers and cabinetsto facilitate system coordinationNumbering of NEMA Phases7-09 ISIGN AL DESIGN SECTIONTRANSPORTATION MOBILITY AND SAFETY DIVISIONNORTlH CAROLINA DEPARTMENT OF TRANSPORTATIONSTD. NO.2.0SHEET 4 OF 4

2-PhaseDual-Ring CabinetPHASING DIAGRAMr:. \)(.02 6\::) : ;04 8TABLE OF OPERATIONPHASESIGNALFACEo204 5 A8 SHFLNOTE, TRAFFIC MOVEMENTS ARESHOWN FOR ILLUSTRATIVEPURPOSES ONLYPhasing Typicals: 2-Phase Operation7-04ISIGN ALS Be GEOMETRICS SECTIONTRAlFlFIC ENGINEERING AND SAlFETY SYSTEMS BRANCHNORTH CAROLINA DEPARTMENT OlF TRANSPORTATIONSTD. NO.2.1 .1SHEET 1 OF 1

( ) - r ).3-PhaseMinimum RecallProtected or ProtectecWermissiveat Cross IntersectionDual-Ring Cabinet3-PhaseMinimum RecallProtected or ProtectecWermissiveat Tee IntersectionDual-Ring CabinetPHASING DIAGRAMPHASING DIAGRAM\ OR02 6)ii-r -)TABLE OF OPERATION. 04 802 6FACE0 0204 6 8 -)02 5(or 01 6)Use appropriate omit note(s)02 501 6)TABLE OF OPERATIONPHASEFLASHSIGNALFACE0020 46FLASHNOTE, TRAFFIC MOVEMENTS ARESHOWN FOR ILLUSTRATIVEPURPOSES ONLYPhasing Typicals: 3-Phase Operation7-04 I (0,-PHASESIGNAL OR ) (l )(, ) r.-C\SIGNALS &GEOMETRICS SECTIONTRAlFlFIC ENGINEERING AND SAlFETY SYSTEMS BRANCHNORTH CAROLINA DEPARTMENT OlF TRANSPORTATIONNOTE, TRAFFIC MOVEMENTS ARESHOWN FOR ILLUSTRATIVEPURPOSES ONLYSTD. NO.2.1.2SHEET 1 OF 2

3-PhaseMinimum RecallLagging Left OperationProtected or Protected1'ermissiveat Tee IntersectionDual-Ring Cabinet3-PhaseMinimum RecallSplit-Side StreetDual-Ring CabinetPHASING DIAGRAM \------f\".1212 6PHASING DIAGRAM\d02 5 OR0302 501 6)(or04TABLE OF OPERATIONTABLE OF OPERATIONPHASESIGNALoFACE 25(]3(]4PHASEFLASSIGNALo0FACE 25H(]4FLASHNOTE, TRAFFIC MOVEMENTS ARESHOWN FOR ILLUSTRATIVEPURPOSES ONLYPhasing Typicals: 3-Phase Operation7-04ISIGN ALS Be GEOMETRICS SECTIONTRAlFlFIC ENGINEERING AND SAlFETY SYSTEMS BRANCHNORTH CAROLINA DEPARTMENT OlF TRANSPORTATIONNOTE, TRAFFIC MOVEMENTS ARESHOWN FOR ILLUSTRATIVEPURPOSES ONLYSTD. NO.2.1.2SHEET 2 OF 2

4-PhaseMinimum RecallProtectecliPermissive Main StreetSplit-Side StreetDual-Ring Cabinet4-PhaseMinimum RecallProtectecliPerm issive Ma i n StreetProtectecliPermissive Side StreetDual-Ring CabinetPHASING DIAGRAMPHASING DIAGRAM T :02 6T :02 603(or04 7)ts , ({-h }j02 501 6)(orUse appropriate omit note(s)TABLE OF OPERATIONSIGNALFACE0 PHASE02 6Use appropriate omit note(s)TABLE OF OPERATIONPHASE0034FLASSIGNALFACEH0*2 60**4 8FLASH* 02 5"* *0, 01 6 (Mojo, Street Lefts)03 8 or 04 7 (Minor Street Lefts)NOTE, TRAFFIC MOVEMENTS ARESHOWN FOR ILLUSTRATIVEPURPOSES ONLYPhasing Typicals: 4-Phase Operation7-04 I04 8SIGNALS &GEOMETRICS SECTIONTRAFFIC ENGINEERING AND SAFETY SYSTEMS BRANCHNORTH CAROLINA DEPARTMENT OF TRANSPORTATIONNOTE, TRAFFIC MOVEMENTS ARESHOWN FOR ILLUSTRATIVEPURPOSES ONLYSTD. NO.2.1.3SHEET 1 OF 3

4-PhaseMinimum RecallProtected Main StreetSplit-Side StreetDual-Ring Cabinet4-PhaseMinimum RecallLead-Lag OperationDual-Ring CabinetPHASING DIAGRAMPHASING DIAGRAM ----,-dT::::: 02 6 2 502 603 ({ttl'Use appropriate omit note(s)TABLE OF OPERATIONPHASESIGNALFACE002 6With older controllers, the phosenumbering may need to be modifiedTABLE OF OPERATIONPHASE0034FLASSIGNALFACEH01 2 6 6002 504 8FLASHNOTE, TRAFFIC MOVEMENTS ARESHOWN FOR ILLUSTRATIVEPURPOSES ONLYPhasing Typicals: 4-Phase Operation7-04 ISIGNALS Be GEOME11'RICS SEC11'ION11'RAFFIC ENGINEERING AND SAFE11'Y SYS11'EMS BRANCHNOR11'H CAROLINA DEPAR11'MEN11' OF 11'RANSPOR11' A TIONNOTE, TRAFFIC MOVEMENTS ARESHOWN FOR ILLUSTRATIVEPURPOSES ONLYSTD, NO,2.1.3SHEET 2 OF 3

4-PhaseSoft RecallProtectecliPermissive Main StreetSplit-Side StreetDual-Ring Cabinet4-PhaseSoft RecallProtected Main StreetSplit-Side StreetDual-Ring CabinetPHASING DIAGRAMPHASING DIAGRAM/'/'//// IT :02 5(or 01 6)(i?;t ?"02 501 6)04Use appropriate omit note!s)FACE 02 6(or04TABLE OF OPERATIONPHASE0034FLASSIGNALFACE00 2 6H0304FLASHNOTE, TRAFFIC MOVEMENTS ARESHOWN FOR ILLUSTRATIVEPURPOSES ONLYPhasing Typicals: 4-Phase Operation7-04 I03 approach isone-way oniy-PHASE00302 603t(t (f)'SIGNAL-I02 6TABLE OF OPERATION (SIGNALS &GEOMETRICS SECTIONTRAFFIC ENGINEERING AND SAFETY SYSTEMS BRANCHNORTH CAROLINA DEPARTMENT OF TRANSPORTATIONNOTE, TRAFFIC MOVEMENTS ARESHOWN FOR ILLUSTRATIVEPURPOSES ONLYSTD. NO.2.1.3SHEET 3 OF 3

5-PhaseMinimum RecallProtectedIPermissive5-PhaseMinimum RecallProtectedPHASING DIAGRAMTABLE OF OPERATION -"',SIGNAL02 6FACE4;;/(r'}0101020204 56568-T :TABLE OF OPERATION PHASET :02 5PHASING DIAGRAMFLASH·t PHASESIGNAL1212 6FACE 02 5 ,t-}::04 801010202 504 6568FLASH·t 04 8IJl 6Use appropriate omit note(s)t :01 5NOTE, TRAFFIC MOVEMENTS ARESHOWN FOR ILLUSTRATIVEPURPOSES ONLYPhasing Typicals: 5-Phase Operation7-04 ISIGNALS Be GEOMETRICS SECTIONTRAFFIC ENGINEERING AND SAFETY SYSTEMS BRANCHNORTH CAROLINA DEPARTMENT OF TRANSPORT A "IrIONNOTE, TRAFFIC MOVEMENTS ARESHOWN FOR ILLUSTRATIVEPURPOSES ONLYSTD. NO.2.1.4SHEET 1 OF 2