Status of Main Author

Graduate student


Environmental Studies

Document Type

Technical Report

Publication Date



Sustainability Impact Assessment (SIA) is a process for assessing the economic, social and environmental impacts of policies and projects based on the United Nations Sustainable Development Goals. SIA expands public participation in the assessment process and the scope of environmental impacts included in Environmental Impact Assessment (EIA). An emphasis on quality of life outcomes in SIA requires the use of subjective metrics in addition to objective analyses typical of EIA. This SIA assesses the proposed closing of Packer Avenue to vehicular traffic in order to make a pedestrian walkway at Lehigh University in Bethlehem, Pennsylvania, USA. The authors analyzed potential positive and negative impacts with regard to local business and the arts, sense of place, the natural environment, traffic and transportation, pedestrian mobility, exposure to pollutants, and safety and emergency access. Assessment methods included interviews with experts and stakeholders, public surveys, systematic behavioral observation, and review of published research. This document includes recommendations to maximize the positive impacts and mitigate negative impacts of the proposed project.