Public involvement, climate change reactions, stakeholder management, and stakeholder management have all been identified as weaknesses in sustainable road infrastructure development (SRID) inquiry. Most scholarly studies on sustainable infrastructure development (SID) are undertaken in advanced countries, while limited academic studies on the SID in third-world countries cite challenges impeding utilization. This chapter examines the conceptual holes in the SID model and aims to solve three identified gaps: public participation, climate change response, and stakeholder management. The inclusion of highlighted challenges is based on the belief that successful SRIP implementation would be impossible without public participation and climate change adaptation. Public participation is essential for the efficient implementation of SID. It allows stakeholders and everyone affected by infrastructure projects to participate in discussions, recognizing possible problems and creating solutions. International organizations, such as the World Bank, have embraced the concept of public participation as a need for effective project implementation. In underdeveloped countries, most infrastructure projects exclude the general populace, so public participation should be seen as a vital variable in the effective implementation of SRIP in poor countries. Arnstein (1969) proposed an eight-stage stepping ladder for citizen involvement from exploitation through consultation to citizens in control. Information is the cornerstone of all types of engagement, and the mildest kind of real involvement is a meeting when project participants voice their concerns and opinions. Co-creation and co-choice are rare in industrialized countries, and the issue of involvement has become a concern. Notification and attendance are prerequisites for meaningful participation, which can begin when the public is given the opportunity to express their opinions. Players are seen as social establishments or gatherings having the power to influence the fate of the organization, and an evaluation of the players is needed to determine whom to include. Participation in projects boosts decision-making efficacy and sufficiency by widening the information base, encouraging innovation, and fostering public acceptance of methodologies. Stakeholder engagement can increase the speed and quality of strategic decision-making. The key takeaways of the chapter are that public participation in road infrastructure projects should have a say in decisions concerning activities that affect their lives or occupations, should take into account the people’s history, cultural, natural, political, and sociological foundations and should be involved in the following ways: initiated early in the life cycle, organized and well-arranged, phased and improved, non-partisan professionals, learning about members’ traits and interests, and focussing on contentious subjects. Public engagement in SRIP implementation must be efficient and well-managed to be successful. Public participation is essential for SRID.
