Novel criteria for sustainable use of urban spaces under bridges in cities by applying DEMATEL technique

At the beginning of the 21st century, cities suffered from high traffic density and mobility problems due to rapid urbanisation and population growth. Bridges were built to encounter these challenges. As a result, the urban voids (urban spaces under bridges) have increased tremendously. In this study, a qualitative analysis was established to understand the negative impacts of urban voids focusing on under-bridges urban spaces. Furthermore, five criteria, as well as thirty-one sub-criteria were derived from the extensive literature and previous international experiences. Additionally, a quantitative analysis was conducted through experts’ interviews. Criteria and sub-criteria were assessed using the decision-making trial and evaluation laboratory (DEMATEL) to determine whether each criterion/sub-criteria belongs to the cause or effect group. Results indicated that the most important criterion was urban identity, as well as the most important sub-criteria belong to each criterion, were social services, investment diversity, sustainable recourses management, ICT-infrastructure, and urban integration.