The HIA was done in conjunction with an environmental impact statement (EIS) examining transit alternatives (e.g., light rail, enhanced bus service or no transportation improvements) for a new proposed public transit corridor in Portland, Oregon. The HIA was carried out by the Oregon Public Health Institute, in collaboration with the local transportation planning agency that was conducting the EIS. The HIA focused on how the proposed project would affect physical-activity levels; air quality; access to services that support health, such as healthy foods, employment and social services; and traffic injuries. Recommendations, such as developing stricter sate requirements for construction equipment emissions, were made to mitigate any unintended negative consequences.