In the context of a TSP update, proposed changes typically include new transportation solutions, such as a new crosswalk or new demand management program, or the removal of solutions. The benefits and negative impacts associated with transportation projects and programs will look different for every community depending on its history, context, and type of project. A project that increases vehicular access to a neighborhood but also increases vehicular traffic volumes may be perceived as a burden if the community already has safety or air pollution concerns.
Quantitative information refers to data that can be expressed as numbers. In a TSP, this data could be summarized demographic information, traffic volumes, or the number of fatal crashes in the community. Qualitative information refers to data that is not easily quantified but provides valuable information about how a community perceives and experiences the transportation system. An example is whether community members feel safe using a part of the transportation system, such as walking down a busy or unlit street. Qualitative information can be obtained through resident interviews, focus groups, surveys with comment boxes, or other methods.
Quantitative and qualitative information are both important for evaluating impacts. While quantitative analysis may provide information about the impacts of proposed solutions, it is important to ground-truth quantitative analysis with qualitative information. For example, ask community members whether the key destinations identified as part of a TSP (OAR 660-012-0360) will be easier or harder to reach with the development of proposed projects. Community members are experts in their experience of the transportation system and will be aware of barriers that may not show up in quantitative analysis.