ULTIMO Web Demo

Stage

Model Assembly

Assembly Choice

Select an assembly to unlock Model Parameters and Run controls.

Phase 1 composable mode is restricted to SAND-compatible combinations.

TG Picker

TD/DC Picker

RC / Assignment Picker

Dynamics / Transitions Picker

Network IO

GMNS Node File (node.csv)

GMNS Link File (link.csv)

Speed Unit (if not declared in GMNS)

Default speed unit is km/h unless GMNS explicitly encodes units.

Selecting both GMNS files auto-loads the network for the active engine.

Network Initialization / Mutation

Network Initialization

Free-Flow Speed Initialization Mode

Free-Flow Speed MinRecommended [0.1,200]

Free-Flow Speed MaxRecommended [0.1,200]

These bounds are initialization-only (period 0). Set min=max for uniform initial speed.

Land Use Initialization

Initial Land-Use Pattern

Initial Land-Use MinRecommended [0,1000000]

Initial Land-Use MaxRecommended [0,1000000]

Set min=max for uniform initialization. Model default keeps baseline behavior (SONG/SONIC random range; SIGNAL downtown when land-use feedback is enabled).

Network Editing

Direct Edit (Selection-Driven)

Select a node or link from the preview.

Set lanes or capacity to 0 to close a link to traffic.

No pending edits.

Save Edited Network

Auto-save Save Name Base Auto: {network}-{YYYY-MM-DD-HH-mm}

Saves two files: {base}-node.csv and {base}-link.csv.

Analyze (Structure + Diagnostics)

Assessment Focus

Connectivity Alert ThresholdRecommended [0,1]

Circuity Alert ThresholdRecommended [1,+inf)

Use this mode for network structure assessment controls.

Land-use, topology evolution, and growth parameters belong to Run stage dynamics layers when those engines are active.

Model Parameters (Demand + Dynamics Architecture)

ADAM parameters are active.

Demand Scaling Layer (Time-of-Day + Mode Choice)

Applies peak-hour/time-of-day and auto mode-choice scaling before engine-specific TG/TD/DC models run.

Peak Hour RateAllowed [0,1]

Auto Mode ShareAllowed [0,1]

Auto OccupancyRecommended [1,10]

All-Purpose Peak MultiplierRecommended [1,4]

Scaling: (Peak Hour Rate * Auto Mode Share * All-Purpose Peak Multiplier) / Auto Occupancy.

Values are preserved when switching between models.

Range warning: use values within the shown [min,max] bands for stable ADAM runs.

Travel Demand

ADAM Trip-End Layer (Trip Generation + Attraction)

Trip Production RateRecommended [0,5]

Trip Attraction RateRecommended [0,5]

ADAM Destination / Impedance Layer

ThetaRecommended [0.01,20]

Length BetaRecommended [0.01,20]

ADAM Route Choice / Assignment Layer (Integrated)

BPR AlphaRecommended [0,2]

BPR BetaRecommended [0,10]

Network Dynamics

ADAM Dynamics Layer

ADAM baseline has no endogenous land-use or topology growth dynamics in this panel.

Land Use Dynamics

Range warning: use values within the shown [min,max] bands for stable SAND runs.

Travel Demand

SAND Trip-End Layer (Trip Generation)

Trip Production RateRecommended [0,5]

SAND Destination Choice / Trip Distribution Layer (Gravity)

Gravity Coefficient (beta)Signed coefficient, exp model defaults to beta = -0.01 (beta < 0 decays)

Impedance Model

SAND Generalized Cost Layer (Impedance)

Dial ThetaRecommended [0.1,60]

Intrazonal CostRecommended [0,2]

Value of TimeRecommended [0.0001,100]

SAND Route Choice / Assignment Layer (Separable)

Assignment Mode

BPR AlphaRecommended [0,2]

BPR BetaRecommended [0,10]

Assignment Max IterationsRecommended [1,1000]

Assignment Error ThresholdRecommended [0.000001,10]

SAND demand scaling uses the demand scaling layer above.

SAND computes gravity OD then assigns trips using the selected route choice model.

Network Dynamics

SAND Dynamics Layer

SAND baseline keeps topology fixed during assignment. Growth/evolution engine controls will appear here as engines are added.

Land Use Dynamics

Range warning: use values within the shown [min,max] bands for stable SONG runs.

Travel Demand

SONG Trip-End + Distribution Layer

Gravity Coefficient (beta)Signed coefficient, exp model defaults to beta = -0.01 (beta < 0 decays)

Impedance Model

Symmetric Flow Loading

SONG Impedance Layer

Value of TimeRecommended [0.0001,100]

Tax Rate (tau)Recommended [0,10]

SONG Revenue/Cost Paper Parameters

Revenue Coefficient (rho0)Recommended [0,100]

Revenue Length Power (rho1)Recommended [0,5]

Revenue Speed Power (rho3)Recommended [0,5]

Revenue Flow Scale (psi)Recommended [1,10000]

Cost Length Power (alpha1)Recommended [0,5]

Cost Flow Power (alpha2)Recommended [0,5]

Cost Speed Power (alpha3)Recommended [0,5]

Investment X-TermRecommended [0,1000000]

These expose SONG paper-form coefficients directly for reproducibility and sensitivity runs.

SONG Route Choice / Assignment Layer

Route Choice Method

BPR AlphaRecommended [0,2]

BPR BetaRecommended [0,10]

Assignment Max IterationsRecommended [1,1000]

Assignment Error ThresholdRecommended [0.000001,10]

SONG assignment mode controls each period's route choice and therefore the flow/speed inputs used by investment updates.

Network Dynamics

SONG Dynamics Layer

Evolution PeriodsRecommended [1,200]

Convergence ThresholdRecommended [0.0000001,1]

Unit Cost (mu)Recommended [1,10000]

Speed Reduction FactorRecommended [0,5]

Gravity Balance IterationsRecommended [1,5000]

Gravity Balance Error ThresholdRecommended [0.000001,10]

Bidirectional Speed Averaging

SONIC Effective Topology Layer

Active Flow ThresholdRecommended [0,1000000]

Inner Demand/Assignment RoundsRecommended [1,20]

Max Pair Removals Per Outer IterationRecommended [1,50]

SONIC runs coupled evolution rounds: SONG demand/assignment on the active network, then deactivates low-flow links while protecting bridge links from removal. Lower removals and threshold values give more conservative topology pruning.

SOUND Structural Diagnostics Layer

Structural Score ThresholdRecommended [0,1000000]

Diagnostics IterationsRecommended [1,500]

SOUND is currently a structure diagnostics adapter. It does not run OD demand assignment in this phase.

PINE Pricing + Investment Layer

Base Dynamics Engine

PINE Base Route Choice Method

Pricing Rule

Investment Rule

Value of TimeRecommended [0.0001,100]

Toll FactorRecommended [0,10]

Maintenance Cost RateRecommended [0,10]

Investment Cost / CapacityRecommended [0.0001,100000]

Max Capacity GrowthRecommended [0,100000]

Policy IterationsRecommended [1,20]

PINE applies pricing/investment updates to a base run result (default SONG) and reports transition effects under policy assumptions.

Land Use Dynamics

SIGNAL Land-Use Feedback Layer

Land-Use Model ToggleRecommended [0,1]

Road Dynamics ToggleRecommended [0,1]

Land-Use Feedback RateRecommended [0,1]

Max Per-Period Land-Use ChangeRecommended [0.01,1]

J-J CoefficientSigned coefficient (default +1.0)

J-W CoefficientSigned coefficient (default +1.0)

W-J CoefficientSigned coefficient (default +0.9)

W-W CoefficientSigned coefficient (default -0.9)

These controls are active only for SIGNAL assembly. Land-use feedback updates node trip-end production/attraction across periods using signed J-J/J-W/W-J/W-W accessibility response coefficients.

Assignments

Seed (RNG)

System Max Speed (technology limit)Recommended [1,300]

External Data / Export

After running, export GMNS-style matrices/link performance and transition snapshots/logs.

Scenario Compare Workspace

Scenario A Manifest (JSON)

Scenario B Manifest (JSON)

Scenario A Transition Log (optional JSON)

Scenario B Transition Log (optional JSON)

Transition-diff details are enabled when both transition-log files are provided.

Load two scenario manifests to compare key outputs and transition summaries.

No pre-loaded network. Select files to begin.

Network Preview

Map Layer Legend Scale Mode Node #

TTI_1 = travel time / current-network free-flow travel time. TTI_0 = travel time / baseline-network free-flow travel time (reported only when free-flow network evolves). Accessibility layers are rendered as a space-covering choropleth with node markers overlaid.

Load a network source to preview.

Select a link to inspect flow/time.

Scale length —

Iteration —

Drop GMNS node.csv + link.csv here (ADAM/SAND/SONG/SONIC/SOUND)

Report

Report View

Run the model to populate report output.

Iteration Big Picture

No run has been started.

Iteration Steps

No iteration trace yet.

Status Window

Idle

Load data to begin.

No errors.