Travel Demand Model Updated Transit Network, Mobile Emission Estimates

Travel demand is one of the critical factors considered in transportation investment decision making.

The travel demand model is a computer tool that estimates traffic and transit volume. Those numbers are based on land use patterns; socioeconomic characteristics of the population and employment; and the composition and configuration of the transportation system.

OKI is the only agency in the region that owns, develops and operates a regional travel demand model.

The model is constantly being monitored, updated and enhanced.

In 2021, OKI’s transit network was updated to incorporate Phase I of Reinventing Metro Plan, the TANK system redesign, and other transit service and fare changes in the region.

The latest changes in major roadways, such as re-configurations, new interchanges and roundabouts, were coded into OKI’s highway network.

OKI’s Activity-Based Travel Demand Model was applied to gather mobile emission estimates for air quality conformity for OKI 2050 Plan amendments. OKI performed travel demand and traffic forecasts for certified traffic and other transportation planning studies for the Ohio Department of Transportation, Kentucky Transportation Cabinet, and other local stakeholders, including:

  •  I-75 Thru the Valley project certified traffic study (PID 113687).
  • Millikin Way Interchange (IR75) feasibility study (PID 113647).
  • Kings Island Drive Extension traffic study.
  • SR 63 corridor study in Warren County between Union Road and east of SR 741 intersection (PID 112121).
  • US 52 in the Village of New Richmond traffic study (PID 114042).

EPA’s Motor Vehicle Emission Simulator (MOVES) is a state-of-the-science emission modeling system that estimates emissions for mobile sources. In 2021, OKI’s Activity-Based Travel Demand Model was integrated with EPA’s MOVES3 software.

OKI applied the integrated model to generate mobile source emission estimates for the re-designation of the Greater Cincinnati area to attainment of the 2015 8-hour ozone, National Ambient Air Quality Standard.

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