Outputs ¶

Travel Model Two (TM2) generates a comprehensive set of output files that capture travel behavior, network performance, and system-wide metrics. This page provides an overview of the major output categories with links to detailed documentation.

Cross-Reference

See Create Base Year Inputs for information about preparing data inputs that generate these outputs.

Major Output Categories ¶

Skim Outputs ¶

Level-of-service matrices representing travel impedances and costs between zones.

Highway Skims: Travel time, distance, and cost matrices for automobile modes
Transit Skims: Comprehensive transit level-of-service indicators including wait times, fares, and in-vehicle times
Active Mode Skims: Walking and bicycling distance matrices between zones
Drive Access Skims: Park-and-ride access impedances

→ View detailed skim output documentation

CTRAMP Outputs ¶

Detailed microsimulation results from the household travel behavior model.

Individual Travel: Person-level tour and trip data with full demographic context
Joint Travel: Household joint tours and coordinated travel patterns
Transit Resimulation: Capacity-constrained transit trip results
Park-and-Ride: Constrained and unconstrained parking demand

→ View detailed CTRAMP output documentation

Assignment Outputs ¶

Network loading results showing traffic and transit flows on infrastructure.

Highway Assignment: Link volumes, speeds, and congestion levels by time period
Transit Assignment: Ridership by line and segment, capacity utilization
Network Performance: System-wide metrics and convergence statistics
Validation Data: Count comparisons and screenline analysis

→ View detailed assignment output documentation

Commercial Vehicle Outputs ¶

Freight and service vehicle demand modeling results.

Truck Trip Generation: Employment and household-based commercial trip production
Trip Distribution: Origin-destination patterns by truck class and commodity
Temporal Distribution: Time-of-day and directional flow patterns
Special Generators: Airport, port, and industrial facility freight movements

→ View detailed commercial vehicle output documentation

Summary Reports ¶

Aggregated performance metrics and validation summaries.

Model Performance: System-wide travel and network performance indicators
Geographic Summaries: County and jurisdiction-level travel patterns
Market Segments: Travel behavior by income, auto ownership, and demographics
Accessibility Analysis: Employment and services accessibility by mode

→ View detailed summary report documentation

Quick Reference ¶

File Locations ¶

model_run_directory/
├── skims/                    # All skim matrices (OMX and text files)
├── ctramp_output/           # CTRAMP microsimulation results
├── hwy/                     # Highway assignment networks and summaries
├── trn/                     # Transit assignment results
├── demand_matrices/         # Trip matrices by purpose and mode
├── output_summaries/        # Aggregated reports and validation
└── logs/                    # Model run logs and diagnostics

Common File Formats ¶

OMX Files (.omx): Matrix data - use OpenMatrix library
CSV Files (.csv): Tabular data - any spreadsheet software
Emme Networks (.net): Network files - Emme software required
Text Files (.txt): Various formatted outputs

Time Periods ¶

All time-specific outputs are generated for five periods:

EA: Early AM (3:00-6:00)
AM: AM Peak (6:00-10:00)
MD: Midday (10:00-15:00)
PM: PM Peak (15:00-19:00)
EV: Evening (19:00-3:00)

Model Iterations ¶

Files include iteration numbers reflecting the feedback process:

Iteration 1: Sample population, preliminary skims
Iteration 2: Full population, updated network conditions
Iteration 3: Final iteration with converged network performance

Usage Guidelines ¶

File Size Considerations ¶

Full model outputs can exceed 10 GB
OMX files are compressed and efficient for large matrices
Consider sampling trip files for analysis (except final validation)

Coordinate Systems ¶

TAZ Level: Regional analysis (1,454 zones)
MAZ Level: Local access analysis (40,000+ zones)
Geographic: California State Plane Zone III

Quality Assurance ¶

Validation outputs compare model results with observed data
Convergence logs document assignment and feedback stability
Summary reports highlight key performance indicators

Analysis Applications ¶

Planning: Long-range transportation plan development
Project Evaluation: Transportation investment analysis
Policy Assessment: Pricing, land use, and service change impacts
Equity Analysis: Transportation access and burden evaluation