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Travel Demand Model

three lanes of traffic on highwayNorth Jersey Regional Transportation Model-Enhanced

In 2008, NJTPA completed a major upgrade to the region’s travel demand model (read about the previous version here), and in 2011, the agency completed a revalidation of the model, which resulted in the North Jersey Regional Transportation Model-Enhanced (NJRTM-E).

This model was developed with NJDOT and NJ TRANSIT and fully incorporates the multi-modal nature of the transportation issues facing northern New Jersey. The model is comprehensive and powerful enough to be used by all major transportation agencies in the region. The NJTPA uses the model for its air quality conformity analysis and long-range planning studies.

In 2015, the NJRTM-E was further refined to improve its transit reporting capabilities and ability to estimate external trips entering the NJTPA region. In June 2018, the NJTPA completed a revalidation project for the NJRTM-E including updating the base year to 2015, expanding the zonal system structure and updating some of the model’s components.  

During Fall 2021, NJTPA began a revalidation project of the NJRTM-E including updating the model to a base year of 2019. This project is scheduled to be completed during the 1st half of 2023.

The NJRTM-E is available on request to consultants and transportation professionals.

Characteristics of the NJRTM-E

  • Platform: A standard four-step model, the NJRTM-E runs on Citilabs software products CUBE (as an interface), and Voyager with additional applications used for reporting.

  • Zonal System: There are 2,712 traffic analysis zones (over 1,600 of these are in the NJTPA region). The model now includes all of New York City and Long Island, portions of southern New Jersey, portions of southern New York State, and portions of eastern Pennsylvania.

  • Highway Network: Within the NJTPA region, the highway network includes most arterials (major and minor) with most 500 level and 600 level county roads. Most collector or local roads are not included. Outside the NJTPA region, the highway network is more schematic, generally representing major regional roadways.

  • Purposes: The model covers eight trip purposes:

    • Home-Based Work Direct (trips between home and work with no intermediate stops)

    • Home-Based Work Strategic (trips between home and work with one or more intermediate stops)

    • Home Based Shopping (trips between home and shopping destinations)

    • Home Based Other (all other trips that either begin or end at home)

    • Work Based Other (trips based at work, other than those associated with the trip from or to home)

    • Non-Home-Non-Work (all other trips that have neither origins nor destinations at home or work)

    • Airport Trips (trips to or from Newark airport)

    • University Trips (trips to or from regional colleges and universities made by students)

  • Modes: Six travel modes are considered for most trip purposes (seven for the Home Based Work trip purpose):

    • Single-Occupant Vehicle (SOV)

    • 2-Occupant Vehicle (HOV-2)

    • 3-Occupant Vehicle (HOV-3)

    • 4 or More-Occupant Vehicle (HOV-4+)—only for Home Based Work

    • Public Transit-Walk Access

    • Transit-Drive Access

    • Trucks (not specified by trip purpose)

  • Public Transit Network: The transit network includes NJTRANSIT rail and bus network, some private bus lines, and ferry services.

  • Trip Generation: The model considers population, household (differentiated by the presence of children and/or retirees) and income data.

  • Highway Assignment: There are four separate networks for the time periods in the model (including expanded peak hour periods):

    • AM Peak (6:00am–9:00am),

    • Midday (9:00am–3:00pm),

    • PM Peak (3:00pm–6:00pm), and

    • Night (6:00pm–6:00am).

For further information, contact Bob Diogo at (973) 639-8409 or [email protected]

Model Data

Model Documentation

Model Presentations

For further information, contact Bob Diogo at (973) 639-8409 or [email protected].