Transport maintenance depots in Ghana are critical for ensuring the reliability of road infrastructure. However, their efficiency and effectiveness have not been systematically evaluated. A quasi-experimental design was employed to assess the impact of depot operations on service delivery time. The study utilised data from four randomly selected depots and compared their performance metrics against a control group. The analysis revealed that Depot B, which implemented process improvements, saw a reduction in average service delivery time by 15% compared to Depots A and C. The quasi-experimental design successfully identified efficiency gains from targeted interventions within the depots' operations. Future research should consider expanding this study to include more depots and explore additional performance metrics for comprehensive evaluation. quasi-experimental design, transport maintenance depots, Ghana, efficiency gains The maintenance outcome was modelled as $Y_{it}=\beta_0+\beta_1X_{it}+u_i+\varepsilon_{it}$, with robustness checked using heteroskedasticity-consistent errors.