Ohio Standard Small/Medium MPO Travel Demand Forecasting Model Network Coding Training May 9 th, 2006.

Ohio Standard Ohio Standard Small/Medium MPO Small/Medium MPO

Travel Demand Travel Demand Forecasting ModelForecasting Model

Network Coding TrainingNetwork Coding Training

May 9May 9thth, 2006, 2006

Highway NetworksHighway NetworksWhat are they?What are they?

Representations of the Representations of the streets, roads, thoroughfares, streets, roads, thoroughfares, and freeways that make up and freeways that make up

the regional highway system.the regional highway system.

Accurate RepresentationAccurate Representation If the network system data are accurate, the level If the network system data are accurate, the level

of effort needed to calibrate or validate the model of effort needed to calibrate or validate the model will be greatly reduced.will be greatly reduced.

Help to avoid questions from the “non-believers”. Help to avoid questions from the “non-believers”. (i.e. People who say the model is worthless when (i.e. People who say the model is worthless when it doesn’t favor their project.)it doesn’t favor their project.)

Garbage In – Garbage OutGarbage In – Garbage Out

Intersection (Junction) ModelingIntersection (Junction) Modeling

Network Checks & DefinitionsNetwork Checks & Definitions

Nodes and LinksNodes and Links

Network ConnectivityNetwork Connectivity

Link AttributesLink Attributes

Turn ProhibitorsTurn Prohibitors

Transit LinesTransit Lines

Nodes and LinksNodes and Links

Nodes are used to define Nodes are used to define intersections, merges, changes in intersections, merges, changes in direction, TAZ centersdirection, TAZ centers– Node number, X and Y coordinatesNode number, X and Y coordinates

Links connect two nodesLinks connect two nodes– Defined by the nodes they connect (A&B)Defined by the nodes they connect (A&B)– Many AttributesMany Attributes

Common Connectivity ErrorsCommon Connectivity Errors

Missing nodesMissing nodes

Missing centroid Missing centroid connectorsconnectors


Wrong way linksWrong way links

Excess linksExcess links


Centroids at non-Centroids at non-intersectionsintersections

Connect centroids Connect centroids to stub links to to stub links to better represent better represent intersectionsintersections


More than 4 links per More than 4 links per nodenode

Will not work with Will not work with intersection calculatorintersection calculator

Turn penalty Turn penalty calculator will report calculator will report these nodesthese nodes



Link AttributesLink Attributes Scrn_PenScrn_Pen – Screenline penalty in minutes – Screenline penalty in minutes

DistDist – Distance in miles – Distance in miles– Automatically calculated for new links, whenAutomatically calculated for new links, when links are split, and when nodes are moved (unless links are split, and when nodes are moved (unless

specified to Do Not Recalculate)specified to Do Not Recalculate)

PostSpdPostSpd - Posted speed limit in miles per - Posted speed limit in miles per hourhour

SpeedModSpeedMod – Speed adjustment in miles – Speed adjustment in miles per hourper hour

Link AttributesLink Attributes FunClassFunClass - the type of roadway based on - the type of roadway based on

operational characteristics - not Federal FCoperational characteristics - not Federal FC

Functional Class Categories:Functional Class Categories:– 10 - Freeway: divided highway, full access control10 - Freeway: divided highway, full access control– 20 - Expressway: divided highway, full or partial access 20 - Expressway: divided highway, full or partial access

control; includes limited access rural control; includes limited access rural arterialsarterials

– 30 - Ramp: entrance/exit for limited access facility30 - Ramp: entrance/exit for limited access facility– 40 - Arterial: serves major movement of traffic40 - Arterial: serves major movement of traffic– 50 - Collector: collects and distributes traffic from several 50 - Collector: collects and distributes traffic from several

access connectionsaccess connections– 60 - Local: only provides access to abutting properties60 - Local: only provides access to abutting properties– 70 - Centroid Connector: represents local access points70 - Centroid Connector: represents local access points


AreaTypeAreaType - specific location/area within - specific location/area within networknetwork

Codes:Codes:– 1 - Rural: controlled intersections 2 miles apart1 - Rural: controlled intersections 2 miles apart– 2 - Suburban: residential development2 - Suburban: residential development– 3 - Urban: mixed residential and commercial3 - Urban: mixed residential and commercial– 4 - Central Business District: intense business 4 - Central Business District: intense business

activity; usually the downtown area of a activity; usually the downtown area of a citycity

– 5 - Outlying Business District: for roads with 5 - Outlying Business District: for roads with excessive access points compared to excessive access points compared to

density density (commercial strips)(commercial strips)– 6 - Low Access Urban: for roads with limited access, 6 - Low Access Urban: for roads with limited access,

such as access-controlled shopping areassuch as access-controlled shopping areas


LanesLanes - number of mid-link through - number of mid-link through travel lanes, and default number of travel lanes, and default number of intersection through lanesintersection through lanes

TwidthTwidth - - directionaldirectional roadway width in roadway width in feetfeet


TurnLaneTurnLane - indication of dedicated left - indication of dedicated left or right turning lanesor right turning lanes– 2-digit codes2-digit codes– 5-digit codes5-digit codes

Use 2-Digit codes when possibleUse 2-Digit codes when possible– First digit is the number of left turn lanesFirst digit is the number of left turn lanes

– Second digit is the number of right turn lanesSecond digit is the number of right turn lanes

– Illustrated: TURNLANE = 10Illustrated: TURNLANE = 10


IXtypeIXtype - intersection type - intersection type– 0 = Pretimed (adaptive) signal0 = Pretimed (adaptive) signal– 1 = Interconnected signal1 = Interconnected signal– 2 = 2-way stop (1-way stop at T-intersections)2 = 2-way stop (1-way stop at T-intersections)– 3 = Uncontrolled intersection3 = Uncontrolled intersection– 4 = All-way stop4 = All-way stop

MedTurnMedTurn - indication of a mid-link median - indication of a mid-link median turn laneturn lane– Codes: 1 = median turn lane, 0 = no laneCodes: 1 = median turn lane, 0 = no lane– If median lane is coded, but no left turns coded If median lane is coded, but no left turns coded

at an intersection, a left turn lane is assumedat an intersection, a left turn lane is assumed


ParkingParking - indicates on-street parking - indicates on-street parking during peakduring peak

– Blank: On-street parking is prohibitedBlank: On-street parking is prohibited– 0: Use only if Lanes field contains operating 0: Use only if Lanes field contains operating

number of lanes and on-street parkingnumber of lanes and on-street parking– 1: 1 lane is used for parking1: 1 lane is used for parking– 2: One-way street with parking on both sides2: One-way street with parking on both sides


TerrainTerrain - accounts for link grade - accounts for link grade characteristicscharacteristics

Codes:Codes:– 1 = Level (<2% grade, 2-3% < 1 mi., 3-4% < 0.25 mi.)1 = Level (<2% grade, 2-3% < 1 mi., 3-4% < 0.25 mi.)

– 2 = Rolling (2-3% grade > 1 mi., 3-4% > 0.25 mi.,2 = Rolling (2-3% grade > 1 mi., 3-4% > 0.25 mi.,

5-6% < 0.3 mi.)5-6% < 0.3 mi.)– 3 = Mountainous (>4% grade > 0.3 mi.)3 = Mountainous (>4% grade > 0.3 mi.)

– Blank = accepts default code set in calculatorBlank = accepts default code set in calculator


CarToll CarToll – Toll per mile for autos– Toll per mile for autos– 3.9 cents per mile3.9 cents per mile

TrkToll TrkToll – Toll per mile for trucks– Toll per mile for trucks– 12.9 cents per mile12.9 cents per mile

Link Attributes Being Phased OutLink Attributes Being Phased Out

IXTHRUIXTHRU

PCTTRKPCTTRK

CAPADJCAPADJ

Calculated Link AttributesCalculated Link Attributes

LNKGRPLNKGRP PEAKSPDPEAKSPD OFFPSPDOFFPSPD PEAKRSPDPEAKRSPD OFFPRSPDOFFPRSPD CAP24CAP24 SAT24SAT24

Other Link AttributesOther Link Attributes

AADTAADT SCNLINESCNLINE DISTRICTDISTRICT ADMCLASSADMCLASS RTENAMERTENAME RTENUMBRTENUMB COUNTYCOUNTY FEDFUNCFEDFUNC

Other Link AttributesOther Link Attributes

FedFunc - federal functional classFedFunc - federal functional class Don’t confuse with FunClassDon’t confuse with FunClassRural Rural UrbanUrban

01 - Interstate 01 - Interstate 11 - Interstate11 - Interstate

02 - Other Principal Arterial02 - Other Principal Arterial 12 - Freeway/Expressway12 - Freeway/Expressway

06 - Major Arterial 06 - Major Arterial 14 - Other Principal Arterial14 - Other Principal Arterial

07 - Major Collector 07 - Major Collector 16 - Minor Collector16 - Minor Collector

08 - Minor Collector 08 - Minor Collector 17 - Collector17 - Collector

09 - Local 09 - Local 19 – Local19 – Local

FunClass for rural principal arterial?FunClass for rural principal arterial?

POHIBITORS POHIBITORS ANDAND

TRANSIT TRANSIT


Text fileText file List of three nodes that define the List of three nodes that define the

turn movement prohibitedturn movement prohibited Each record also has a set number Each record also has a set number

and prohibitor definition (-1)and prohibitor definition (-1) Updating of file is Updating of file is semi-automaticsemi-automatic, ,

but for but for link splitslink splits only only File can also contain link penalty File can also contain link penalty

overrides (in minutes)overrides (in minutes)

Turn ProhibitorsTurn Prohibitors Example ListingExample Listing

2576 1656 401 1 -12576 1656 401 1 -1 2669 1657 1658 1 -12669 1657 1658 1 -1 2588 1750 2584 1 -12588 1750 2584 1 -1 2582 1756 2586 1 -12582 1756 2586 1 -1 2789 1805 2657 1 -12789 1805 2657 1 -1 2659 1807 2788 1 -12659 1807 2788 1 -1 2630 1854 2634 1 -12630 1854 2634 1 -1 2636 1856 2632 1 -12636 1856 2632 1 -1 1912 1926 1928 1 41912 1926 1928 1 4 1928 1926 1912 1 41928 1926 1912 1 4 1910 1930 2820 1 41910 1930 2820 1 4 2820 1930 1910 1 42820 1930 1910 1 4 2666 2162 2670 1 -12666 2162 2670 1 -1 2559 2563 2555 1 -12559 2563 2555 1 -1

Transit LinesTransit Lines

Text fileText file Route attributes and a listing of Route attributes and a listing of

nodes that define the routenodes that define the route Automatic updating feature when Automatic updating feature when

network changednetwork changed LINE NAME="1", MODE=1, ALLSTOPS=T, HEADWAY[1]=29, ONEWAY=F,LINE NAME="1", MODE=1, ALLSTOPS=T, HEADWAY[1]=29, ONEWAY=F,

XYSPEED=20, N=1206, -1280, 1282, -1284, -1286, 1296, -1326,XYSPEED=20, N=1206, -1280, 1282, -1284, -1286, 1296, -1326,

-1322, -1320, -1318, 936, 886, -934, -926, -906, 944, -832,-1322, -1320, -1318, 936, 886, -934, -926, -906, 944, -832,

-949, -830, 2878, 828, -578, -576, -574, -572, 570, 732, -568,-949, -830, 2878, 828, -578, -576, -574, -572, 570, 732, -568,

-566, -564, 2873, 476, 501, 421, 426, -2819, -424, 419-566, -564, 2873, 476, 501, 421, 426, -2819, -424, 419

Before Network EditingBefore Network Editing Open Turn Penalty Open Turn Penalty

(Prohibitor) File(Prohibitor) File

Display LocationsDisplay Locations– Node/Point ColorNode/Point Color– Use NumProh>0Use NumProh>0– Use NumPenalty>0 to view Use NumPenalty>0 to view

prohibitor and override prohibitor and override penaltiespenalties

Penalties not used in Penalties not used in junction modeling for junction modeling for nodes defined as nodes defined as junctionsjunctions


•At least one prohibitor per location shownAt least one prohibitor per location shown


View (Edit) ProhibitorsView (Edit) Prohibitors First use pointer to select a First use pointer to select a

nodenode


Saving changes to the prohibitor file is Saving changes to the prohibitor file is separate from saving network changesseparate from saving network changes

Use the disk icon in the Edit Penalties Use the disk icon in the Edit Penalties viewer to save prohibitor changesviewer to save prohibitor changes

Nodes will be temporarily be changed Nodes will be temporarily be changed when splitting a link, but the prohibitor file when splitting a link, but the prohibitor file must be savedmust be saved

Deleting links will leave stranded Deleting links will leave stranded prohibitorsprohibitors


To be safe, delete prohibitors firstTo be safe, delete prohibitors first– Click the movement in the penalty matrix and Click the movement in the penalty matrix and

delete prohibitor indicator (-1)delete prohibitor indicator (-1)– Add prohibitors back in after network changesAdd prohibitors back in after network changes– Turn penalty calculator will list turn prohibitor Turn penalty calculator will list turn prohibitor

movements that are not in the network movements that are not in the network (turn2000.log)(turn2000.log)

Arrow diagram in viewerArrow diagram in viewer– Left click for From LegLeft click for From Leg– Right click for To LegRight click for To Leg

Turn PenaltiesTurn Penalties Turn Penalty Calculator uses prohibitors in Turn Penalty Calculator uses prohibitors in

conjunction with default penalties based on conjunction with default penalties based on movement direction and link functional classesmovement direction and link functional classes

Left, Right, and Through movements calculated Left, Right, and Through movements calculated based on the angle between linksbased on the angle between links

Use Process Template…\[Turn Calculator 2000] to Use Process Template…\[Turn Calculator 2000] to view/change default valuesview/change default values

(value of 20 means 0.20 minutes)(value of 20 means 0.20 minutes)

Turn Prohibitor file can also contain Penalty Turn Prohibitor file can also contain Penalty override valuesoverride values

Turn PenaltiesTurn Penalties Complete penalties and prohibitors can also be Complete penalties and prohibitors can also be

viewedviewed

In junction modeling, penalties not used at ‘valid’ In junction modeling, penalties not used at ‘valid’ intersections:intersections:– Has 3 or 4 total linksHas 3 or 4 total links– Has 3 o 4 non-centroid linksHas 3 o 4 non-centroid links– Has at least 2 non-centroid entrance linksHas at least 2 non-centroid entrance links– Has at least one link of functional class 40, 50 or 60Has at least one link of functional class 40, 50 or 60– At least one of those non-centroid entrance links has an At least one of those non-centroid entrance links has an

IXTYPE other than 3 or all IXTYPE’s are blank IXTYPE other than 3 or all IXTYPE’s are blank

Before Network EditingBefore Network Editing

Add Transit LayerAdd Transit Layer

Layer Control \ Layer Control \ Transit \ Layer Transit \ Layer PropertiesProperties

Browse… Open Browse… Open Transit Line File Transit Line File (*.lin)(*.lin)

Transit LayerTransit Layer

All transit linesAll transit lines

displayeddisplayed

Transit ToolsTransit Tools– Display Transit Line(s)Display Transit Line(s)– Display All Transit LinesDisplay All Transit Lines– Transit Line ManagerTransit Line Manager

Add other transit linesAdd other transit lines

Display Transit \ Clear All \ OKDisplay Transit \ Clear All \ OK– Lines aren’t shown, but are still loadedLines aren’t shown, but are still loaded

Transit LayerTransit Layer

Splitting network Splitting network links used by a links used by a transit linetransit line– Must save the Must save the

transit line filetransit line file

Deleting network Deleting network links used by a links used by a transit linetransit line– Transit line will use Transit line will use

XYSPEED valueXYSPEED value

NETWORK EDITINGNETWORK EDITING

Editing ToolsEditing Tools

Pointing ModePointing Mode Zoom InZoom In Zoom OutZoom Out View Move (Pan)View Move (Pan) Post 1 NodePost 1 Node Post 1 LinkPost 1 Link RefreshRefresh Zoom AllZoom All Center on NodesCenter on Nodes Post NodePost Node Post LinkPost Link Node/Point ColorNode/Point Color Link/Line ColorLink/Line Color Band Width SettingsBand Width Settings Layer ControlLayer Control

Geometry and DirectionGeometry and Direction

OldOld

NewNew

IntersectionsIntersections

5-legged 5-legged IntersectionsIntersections– Merge 2 legs into a Merge 2 legs into a

stub link near the stub link near the intersectionintersection

– Do not code IXTYPE Do not code IXTYPE for these 2 linksfor these 2 links

– Stub IXTYPE is Stub IXTYPE is uncontrolled, and uncontrolled, and Distance = 0Distance = 0

IXTYPE

IntersectionsIntersections

Divided Highways Divided Highways ((at-grade signal)at-grade signal)

Divided Highways Divided Highways (end of division)(end of division)

Stop IntersectionsStop Intersections Stop ControlStop Control

– All-way stopAll-way stop– 2-way stop2-way stop

All traffic control All traffic control interruptions coded for interruptions coded for geometry, even if no geometry, even if no significant volume significant volume exists on a legexists on a leg

Do not have a centroid Do not have a centroid connected to a stopped connected to a stopped 3-legged intersection3-legged intersection

IXTYPE

Stop IntersectionsStop Intersections

Stop Control HCM LimitationsStop Control HCM Limitations– For 3-legged intersections, there cannot For 3-legged intersections, there cannot

be stops on only 2 legsbe stops on only 2 legs– For 4-legged intersections, there cannot For 4-legged intersections, there cannot

be two adjacent stops, unless it is an all-be two adjacent stops, unless it is an all-way stopway stop

If reality contradicts these rules, code If reality contradicts these rules, code the reality and let the junction the reality and let the junction calculator use it’s default methodologycalculator use it’s default methodology

Signalized IntersectionsSignalized Intersections

All incoming links to a signal node All incoming links to a signal node should be codedshould be coded

If even one leg is coded as If even one leg is coded as uncontrolled, the whole intersection uncontrolled, the whole intersection will be treated as partial stopwill be treated as partial stop

Do not have a centroid connected to Do not have a centroid connected to a signalized 3-legged intersectiona signalized 3-legged intersection

Intersection Turn LanesIntersection Turn Lanes

2-Digit Codes2-Digit Codes– First digit = left only lanesFirst digit = left only lanes– Second digit = right only lanesSecond digit = right only lanes

5-Digit Codes5-Digit Codes– First digit = left only lanesFirst digit = left only lanes– Second digit = shared left/through lanesSecond digit = shared left/through lanes– Third digit = through only lanesThird digit = through only lanes– Fourth digit = shared right/through lanesFourth digit = shared right/through lanes– Fifth digit = right only lanesFifth digit = right only lanes


Shared lanes assumed if movements are Shared lanes assumed if movements are allowed but no exclusive lanes are allowed but no exclusive lanes are specifiedspecified– One approach lane : all movements allowedOne approach lane : all movements allowed– Two approach lanesTwo approach lanes

One Left/Through laneOne Left/Through lane One Through/Right laneOne Through/Right lane

– Three approach lanesThree approach lanes One Left/Through laneOne Left/Through lane One Through only laneOne Through only lane One Through/Right laneOne Through/Right lane


Use 2-digit code when possibleUse 2-digit code when possible

When to use 5-digit codeWhen to use 5-digit code– Dual turn lane when one is sharedDual turn lane when one is shared– Through lanes is different from LANESThrough lanes is different from LANES

Default through lanes = LANESDefault through lanes = LANESEliminates the need to code IXTHRUEliminates the need to code IXTHRU

Try to code the middle digit (of 5)Try to code the middle digit (of 5)

5 Digit Turn Lane Coding5 Digit Turn Lane Coding

LANES, PARKING, IXTHRU, and LANES, PARKING, IXTHRU, and MEDTURN are all ignoredMEDTURN are all ignored

However, LANES, PARKING, and However, LANES, PARKING, and MEDTURN still affect the computation MEDTURN still affect the computation of saturation flow rate and should of saturation flow rate and should thus be maintained thus be maintained

Miscoded Turn LanesMiscoded Turn Lanes If there is no left turn allowed (but through If there is no left turn allowed (but through

and right exist) and left (or shared left) and right exist) and left (or shared left) lanes are codedlanes are coded If there were no right (or shared right) lanes If there were no right (or shared right) lanes

coded all lanes are simply shifted over 2 places coded all lanes are simply shifted over 2 places (left becomes through, shared left/through (left becomes through, shared left/through becomes shared right/through, and through becomes shared right/through, and through becomes right)becomes right)

If there were also right (or shared right) lanes If there were also right (or shared right) lanes coded, then all left and shared left lanes are coded, then all left and shared left lanes are added to through lanesadded to through lanes

This same process occurs in reverse if there This same process occurs in reverse if there are no right turns allowed.are no right turns allowed.

Miscoded Turn LanesMiscoded Turn Lanes

If there is no through movement If there is no through movement allowed (but there are left and right) allowed (but there are left and right) and left (or shared left) lanes are and left (or shared left) lanes are coded but no right (or shared right)coded but no right (or shared right)– The through lanes are moved to The through lanes are moved to

exclusive rightexclusive right


Median Turn Lanes (TWLTL)Median Turn Lanes (TWLTL)

If MEDTURN = 1 and If MEDTURN = 1 and nono exclusive left exclusive left turn lanes are coded, 1 Left Turn turn lanes are coded, 1 Left Turn Lane is assumedLane is assumed

If MEDTURN = 1 and exclusive left If MEDTURN = 1 and exclusive left turn lane is coded, Left Turn Lanes turn lane is coded, Left Turn Lanes used is the number coded.used is the number coded.

ATTRIBUTE CHECKINGATTRIBUTE CHECKING

Attribute CheckingAttribute Checking

Link/Line ColoringLink/Line Coloring

Link Annotation (Posting)Link Annotation (Posting)

CombinationCombination


Link/Line Link/Line ColorColor– Color/StyleColor/Style– SizeSize– CriteriaCriteria

Hierarchy of Hierarchy of conditionsconditions

Multiple SetsMultiple Sets


IXTYPE by link colorIXTYPE by link color


Attribute CheckingAttribute Checking Draw Offset = 3Draw Offset = 3

Attribute CheckingAttribute CheckingAttribute CheckingAttribute Checking Draw Offset = 3, post TurnLane (for Turnlane <>’00’)Draw Offset = 3, post TurnLane (for Turnlane <>’00’)


Link Splitting or Copy/PasteLink Splitting or Copy/Paste

TURNLANE

Attribute CheckingAttribute Checking Attributes that cause problems from splitsAttributes that cause problems from splits

– TURNLANETURNLANE– IXTYPEIXTYPE– AADTAADT– SCRN_PENSCRN_PEN

More problems from copyingMore problems from copying– RTENAMERTENAME– RTENUMBRTENUMB– DISTRICTDISTRICT– SCRNLINESCRNLINE– And more if a dissimilar type link was chosenAnd more if a dissimilar type link was chosen

Saving Attribute DisplaysSaving Attribute Displays

Save a Project FileSave a Project File– Typically with the same name as the Typically with the same name as the

network, but with a different file network, but with a different file extension (*.VPR)extension (*.VPR)

Project files can be used with other Project files can be used with other networksnetworks– Manually edit the VPR text file to read a Manually edit the VPR text file to read a

different network filedifferent network file– Save the network as a different file, then Save the network as a different file, then

save the project filesave the project file

JUNCTION CALCULATORJUNCTION CALCULATOR

Junction CalculatorJunction Calculator Automatically generates a Voyager format Automatically generates a Voyager format

junction file using link information that junction file using link information that was coded as part of the capacity was coded as part of the capacity calculator level of detail 3 updatecalculator level of detail 3 update

HCM intersection modeling procedures will HCM intersection modeling procedures will be applied during each iteration of traffic be applied during each iteration of traffic assignment to the turning movement at assignment to the turning movement at the modeled intersectionsthe modeled intersections

Intersection modeling can be viewed as Intersection modeling can be viewed as nothing other than dynamic turn penalties nothing other than dynamic turn penalties

Junction CalculatorJunction Calculator

More accurate representation of More accurate representation of system operation than is obtained system operation than is obtained from the link based BPR style volume from the link based BPR style volume delay curvesdelay curves

Eventual capability to export Eventual capability to export Voyager junction information to Voyager junction information to Dynasim to conduct operational level Dynasim to conduct operational level traffic microsimulationtraffic microsimulation


DifferencesDifferences– Saturation Flow RatesSaturation Flow Rates– Run Time SpeedsRun Time Speeds– Turn Penalties not usedTurn Penalties not used

Intersection Data FileIntersection Data File– Control TypeControl Type– Lane GeometryLane Geometry– Signal PhasingSignal Phasing


In junction modeling, intersection data In junction modeling, intersection data calculated for ‘valid’ intersections:calculated for ‘valid’ intersections:– Has 3 or 4 total linksHas 3 or 4 total links– Has 3 o 4 non-centroid linksHas 3 o 4 non-centroid links– Has at least 2 non-centroid entrance linksHas at least 2 non-centroid entrance links– Has at least one link of functional class 40, 50 Has at least one link of functional class 40, 50

or 60or 60– At least one of those non-centroid entrance At least one of those non-centroid entrance

links has an IXTYPE other than 3 or all IXTYPE’s links has an IXTYPE other than 3 or all IXTYPE’s are blank are blank


Intersection types generatedIntersection types generated– Adaptive (Actuated) SignalsAdaptive (Actuated) Signals– 2-way Stop2-way Stop– All-way StopAll-way Stop

Others allowedOthers allowed– Pretimed SignalsPretimed Signals– YieldYield– RoundaboutsRoundabouts

Inconsistent IXTYPEInconsistent IXTYPE

IXTYPE determined based on functional IXTYPE determined based on functional class and areatype comparisons (and class and areatype comparisons (and possibly counts if used)possibly counts if used)

Intersection areatype uses the following Intersection areatype uses the following priority order: rural, cbd, urban, suburbanpriority order: rural, cbd, urban, suburban– if any link is rural, the intersection is ruralif any link is rural, the intersection is rural– all links must be suburban for the intersection all links must be suburban for the intersection

to be suburbanto be suburban

IXTYPE DeterminationIXTYPE Determination

Rural IntersectionRural Intersection– If the main road is lower (better) functional If the main road is lower (better) functional

class than the minor the intersection is 2-way class than the minor the intersection is 2-way stop on the minor roadstop on the minor road

– If equal functional class and nonzero counts If equal functional class and nonzero counts exist on both the major and minor streets then exist on both the major and minor streets then the intersection is 2-way stop on the minor the intersection is 2-way stop on the minor road, all other rural intersections are all-way road, all other rural intersections are all-way stop (i.e. those with equal functional class stop (i.e. those with equal functional class where counts are not available where counts are not available


Non-rural IntersectionNon-rural Intersection– Local main and local minor; 2-way stop Local main and local minor; 2-way stop

on minor if nonzero counts are available on minor if nonzero counts are available to define the minor street, otherwise all to define the minor street, otherwise all way stopway stop

– Collector main and local minor; are 2-Collector main and local minor; are 2-way stop on minorway stop on minor


Suburban IntersectionSuburban Intersection– Arterial main and local minor are 2-way Arterial main and local minor are 2-way

stop on minorstop on minor– Collector main and collector minor are Collector main and collector minor are

2-way stop if nonzero counts are 2-way stop if nonzero counts are available to define the minor street, available to define the minor street, otherwise all way stopotherwise all way stop

All others are signalized.All others are signalized.

Adaptive Signal PhasingAdaptive Signal Phasing

Phase 1, Protected Left on Major Street (if Phase 1, Protected Left on Major Street (if exclusive left turn lanes on both exclusive left turn lanes on both approaches of major)approaches of major)

Phase 2, Right, Through, Permitted Left on Phase 2, Right, Through, Permitted Left on Major StreetMajor Street

Phase 2 or 3, Protected Left on Minor Phase 2 or 3, Protected Left on Minor Street (if exclusive left turn lanes on both Street (if exclusive left turn lanes on both approaches of minor)approaches of minor)

Phase 3 or 4, Right, Through, Permitted Phase 3 or 4, Right, Through, Permitted Left on Minor StreetLeft on Minor Street

Adaptive Signal TimingAdaptive Signal Timing

Cycle Length from 60 to 120 secondsCycle Length from 60 to 120 seconds

Through Phases from half the initially Through Phases from half the initially specified green time to 90 secondsspecified green time to 90 seconds

Protected Left Phases from 0 to 40 Protected Left Phases from 0 to 40 secondsseconds

Intersection DataIntersection Data

Load file created Load file created by junction by junction calculator (*.ind)calculator (*.ind)

Show locationsShow locations



Select a node with Select a node with intersection dataintersection data

Click the icon on Click the icon on the node the node information boxinformation box

Intersection Data EditorIntersection Data Editor

Intersection Intersection AttributesAttributes– Lane GeometryLane Geometry– PhasesPhases

Regular layoutRegular layout


2 Phase2 Phase

4 Phase4 Phase

Intersection Data FileIntersection Data File

Text fileText file Can be modified to Can be modified to

be used as an be used as an overrideoverride

Save only lines Save only lines that correspond to that correspond to the nodes to be the nodes to be editededited

Always include first Always include first line (UNITS line (UNITS LENGTH=FEETLENGTH=FEET

Intersection Data OverrideIntersection Data Override

Open extracted intersection file with Open extracted intersection file with nodes to be modifiednodes to be modified

Use Intersection Data Editor to make Use Intersection Data Editor to make changeschanges– Allowed phasesAllowed phases– Phase timingPhase timing


Vehicle and Vehicle and pedestrian pedestrian movementsmovements

Click to toggle Click to toggle on/offon/off– Green = onGreen = on– Red = offRed = off

Save, OKSave, OK


Saves are only in a Saves are only in a bufferbuffer

Save Intersection Save Intersection Data FileData File

Save Intersection Save Intersection Data File As…Data File As…

Ohio Standard Small/Medium MPO Travel Demand Forecasting Model Network Coding Training May 9 th, 2006.

Documents

links nodes

nodes links

nodes missing nodes

new links

hour slide

y coordinates links

taz centers nodes

non intersections centroids