Sustainable Roads for Sub-Saharan Africa: A Hybrid Construction 4.0 Approach

Sub-Saharan economies face critical infrastructure deficits, including frameworks for adopting Construction 4.0 technologies in road development. This study addresses this gap by developing structured Hybrid Construction 4.0 adoption pathways tailored to resource-constrained contexts. Through semi-structured interviews with 30 Ghanaian construction experts, compromising construction engineers, project managers, local contractors, and road governing professionals, the study identified six compatible technologies: (i) BIM integrated with local norms and materials, (ii) mobile project management apps combined with manual supervision, (iii) low-cost IoT sensors embedded in indigenous subgrade materials, (iv) drones/UAVs supported by traditional surveys and community insights, (v) GIS/satellite data harmonized with local land-use knowledge, and (vi) modular mobile labs for on-site testing. The study further delineates distinct, cost-effective technology progression sequences for road typologies and firm sizes, advocating for a gradual transition that maximizes return on investment and minimizes operational disruption. This endeavour provides a novel-empirically driven framework for HC4.0 adoption, moving beyond theoretical barriers to offer a pragmatic, scalable pathway. By focusing on technological hybridization and phased sequencing within the specific socioeconomic and infrastructural realities of Sub-Saharan economies, this study offers a replicable model for sustainable infrastructure modernization in developing countries.