The common types of transportation infrastructures include roads, railways, bridges and tunnels, railway and bus stations, airports, waterways and ports.

Despite robust and well-planned mega-projects, unexpected problems will emerge in various stages of these projects unless possible risks are identified and assessed beforehand.

Large-scale transportation infrastructure projects also bring about numerous risks such as cost, schedule, technical, managerial, economic, or legal. Therefore, risk assessment process has become a requisite in increasing the success as well as minimizing the problems of these mega-projects.