The International Conference on Sustainable Materials, Structures and IoT (SMSI-2024) was organized by Department of Civil Engineering, Indira Gandhi Institute of Technology Sarang, India. The practical problems associated with various engineering in many developing countries including India and developed countries are different and complex. Therefore, researchers and agencies have been working to tackle these challenges and to identify implementable solutions for various transportation engineering related problems as per prevailing conditions. As a recurring event with nationwide participation, SMSI-2024 converged experts, researchers, practitioners, industry professionals around the world to share and deliberate on their work, offering profound insights into emerging technological trends. This conference invited papers related to various themes under the umbrella of engineering.