Before you start . . .

Before engaging Mosaic, users need to complete a few steps in the transportation planning process, following established Oregon transportation planning procedures and guidance. These initial steps are briefly described below. 

1. Identify and Initiate an Appropriate Public Engagement Process

All transportation planning processes in Oregon, as outlined in Goal 1 of the Statewide Planning Goals, must meaningfully involve the public in developing ideas and making decisions. ODOT’s public involvement policy calls for involving the public in important decisions by providing for early, open, continuous, and effective public participation in and access to key planning and project decision-making processes. According to the agency’s Transportation System Planning Guidelines, advisory groups should be involved and made up of a variety of traditional and non-traditional interests, including underserved populations. The public involvement process is especially important in weighting Mosaic’s non-monetizable indicators. It is important that the weighting process be done by stakeholders, including the public, and that it reflect community values.

2. Identify the Study Area

In some transportation planning processes, identifying the study area is a simple exercise. The study area may, for example, constitute an entire city, metropolitan area, or county. However, it is worth having a conversation before engaging Mosaic to confirm the study area is correct.

  • Are urban growth boundary expansions being considered?
  • Are these part of the existing travel demand model?
  • Is the area actually a corridor and if so, how many geographies are there in the corridor?
  • Is the study area primarily in one city with the exception of one bundle that extends into a neighboring city?

The reason it is critical to be clear on the study area upfront is that data sets need to be compiled and assessed for accuracy before the Mosaic process begins.

If there is data...

  • From two different travel demand models or
  • From one travel demand model with some assessments outside of a model or
  • From two or more agency geographic information systems (GIS)


  • A procedure must be followed to ensure consistency among datasets or to combine datasets.

3. Assess Existing and Forecast Future Conditions, Identify Needs and Opportunities

The step of surveying existing conditions and forecasting future conditions to identify needs and opportunities is also outside of the Mosaic process. The Transportation Planning Rule and other resource documents, including ODOT’s Analysis Procedures Manual, include best practices and guidance for assessing existing and future conditions. This work should be done before engaging Mosaic because bundles of actions need to address some set of needs and opportunities; they represent alternatives for achieving the plan’s vision and goals.

4. Identify the List of Potential Solutions for Evaluation

Agencies and stakeholders must next identify bundles of transportation actions for analysis. These are sets of individual transportation projects and programs (potential solutions) being considered for inclusion in a system or corridor plan, and may be simply be referred to as "alternatives" or “bundles” for Mosaic. Additionally, Mosaic can enable agencies to evaluate vehicular demand management strategies and other programs in bundles of actions. Programmatic options users may include are further described in the Mosaic Programs Guide

5. Ensure Forecasting and Analysis Tools are Ready for Use

To realize the full potential of Mosaic, users should have access to a travel forecasting model and set of geographic information system (GIS) data. Travel model data is essential for several monetized indicators. While Mosaic can be used without a travel forecasting model, the result will be a less robust level of analysis because less robust data is used and fewer impacts can be monetized.

The GIS data needs to be current and available at the appropriate geographic scale(s). The types of GIS data required for the suite of Mosaic Indicators include: demographic, land use, transportation facilities, environmental, and cultural resource data. Use of GIS data is central to several MODA indicators.

In preparing to use Mosaic, planners should meet with their GIS and modeling staff to make sure travel demand forecasting tools and GIS databases are current, that the data needed are available, and that staff is available to conduct analyses and output results for Mosaic.