This paper discusses corruption in the construction industry to delineate its effects on gravel roads, drawing from Tanzanian experiences. To attain this aim, the paper analyses the following aspects: cooperation between legal entities providing services to the community and the road authorities managing road networks during execution of road works; selection of subcontractors by the main contractor, and the relationship between materials, laboratory personnel responsible for checking the quality and quantity of road works and the contractor, client and consultant; the relationship between client representatives, contractors and project engineer; and, the relationship between contractors and their employees in terms of salary, accommodation and working conditions. As a result of these relationships, gravel roads are affected negatively in terms of their quality. The paper argues that corruption in the Tanzanian construction industry