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This study aims to examine the role of project managers (PMs) in construction health and safety in Ghana.

Purposive sampling technique was used to select licenced PMs in Ghana where data was collected with the use of structured questionnaires. Mean score analysis, Kendall’s Coefficient of Concordance, Relative Importance Index and Cronbach’s alpha were used to analyze the data.

The study discovered that most PMs on construction firms in Ghana allocate between 1% and 5% of the total project cost to health and safety. According to the study, client satisfaction is the most important parameter to consider in construction project management. Structural frame, method of fixing and edge of materials were the key design activities that caused PMs to make frequent reference to health and safety. It was revealed that PMs refer to health and safety when confronted by all the procurement-related situations.

The research is limited to the built environment professionals in Ghana. The findings cannot be generalized and extended to other developing countries; however, it could serve as a lesson to them.

The findings of the study are anticipated to provide information about the critical role of PMs in promoting health and safety throughout the project life cycle.

The novelty of the study sought to delve into the complex nature of construction to identify the role of PMs in relation to the health and safety practices in the construction industry.

The application of circular economy (CE) has received wide coverage in the built environment, including public-private partnership (PPP) infrastructure projects, in recent times. However, current studies and practical implementation of CE are largely associated with construction demolition, waste and recycling management. Few studies exist on circular models and success factors of public infrastructures developed within the PPP contracts. Thus, the main objective of this article is to identify the models and key success factors associated with CE implementation in PPP infrastructure projects.

A systematic review of the literature was undertaken in this study using forty-two (42) peer-reviewed journal articles from Scopus, Web of Science, Google Scholar and PubMed.

The results show that environmental factors, sustainable economic growth, effective stakeholder management, sufficient funding, utilization of low-carbon materials, effective supply chain and procurement strategies facilitate the implementation of CE in PPP infrastructure projects. Key CE business models are centered around the extension of project life cycle value, circular inputs and recycling and reuse of projects.

Although the study presents relevant findings and gaps for further investigations, it has a limited sample size of 42 papers, which is expected to increase as CE gain more prominence in PPP infrastructure management in future.

The findings are relevant for decision-making by PPP practitioners to attain the social, economic and environmental benefits of transitioning to circular infrastructure management.

This study contributes to articulating the key models and measures toward sustainable CE in public infrastructure development.