Transportation impact assessment is a research area that focuses on evaluating the effects of various transportation projects, policies, and developments on the environment, society, and economy. This includes examining the potential impacts on air and noise pollution, traffic congestion, public health, accessibility, and land use. Transportation impact assessments are typically conducted prior to the implementation of new transportation projects to identify potential impacts and help inform decision-making processes. Research in this area often involves a combination of quantitative analysis, modeling, and stakeholder engagement to assess the various impacts of transportation systems and inform sustainable transportation planning and design.