Travel demand is one of the critical factors considered in transportation investment decision making. The travel demand model is a computer tool used to estimate traffic volume and speed based on information such as land use patterns, socioeconomic characteristics of the population and employment, and the composition and configuration of transportation system.

The model forecasts volume and speed on roadway segments and transit ridership on transit routes. It is constantly being monitored, updated, and enhanced.

In 2023, OKI successfully developed, calibrated and validated the OKI-only travel demand model. The model incorporates updated socioeconomic, land use, and transportation system inputs, ensuring precision and relevance.

The new model is calibrated and validated to the 2020 traffic and travel conditions in the OKI region. This is based on a comprehensive array of data sources, including the Regional Household Travel Survey data, the traffic counts, the StreetLight Origin- Destination data, and the INRIX speed data.

The rigorous calibration and validation process enhanced the model accuracy and adaptability of travel and traffic forecasting within the region. A comprehensive model validation report was generated to illustrate the model’s efficiency and reliability in generating traffic and travel forecasts.


Motor Vehicle Emission Simulator Adoption
OKI tested and adopted the EPA’s next-generation Motor Vehicle Emission Simulator, the MOVES4.

The MOVES4 will be applied on air quality conformity analysis for the Transportation Improvement Plan (TIP) and Metropolitan Transportation Plan planning and other environmental studies in OKI region.

Air quality conformity analysis for short and long range planning
OKI generated mobile source emission estimates for the air quality conformity analysis for the 2050 Transportation Plan amendments and TIP update.

OKI assisted ODOT with model files to generate mobile source emission estimates for the Brent Spence Bridge project’s environmental evaluation.

Traffic forecasts, traffic and environmental studies for stakeholders
OKI conducted a comprehensive travel demand and traffic forecast to support certified traffic and other transportation planning studies for stakeholders, including:

  • Road diet traffic study on W. 8th Street and Linn Street (City of Cincinnati)
  • US25 Corridor Study (Update) (KYTC)
  • Little Miami Crossing Alternative Analysis (ODOT)
  • Hoptown Long Range Planning (ODOT)
  • City of Fairfield Sustainability Plan (City of Fairfield)
  • Automobile emission reduction analysis for the proposed Transit Fare-Free program (SORTA and TANK)
  • OKI produced traffic growth estimates for more than 10 traffic and environmental studies in the OKI region.
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