外部风险——外部风险可能是一种不可控制的类型，其中之一是市场经济状况不佳。该项目依赖于有利的市场条件，因为它确保其财务、分包商和按预期价值购买资源。当市场状况突然恶化时，会立即影响资金的可得性和市场情绪，市场情绪明显下降(Wang et al.， 2004)。这可能会给项目带来财务困难，导致最后期限的延迟和信心的丧失。这种风险出乎意料，但影响巨大，2008年至2009年的全球金融危机就证明了这一点。这场危机本来是可以预料到的，但它对发展中经济体的影响程度却没有得到假设。
Technical risk – The project is an engineering project and involves numerous complexities to integrate and deliver the objective. Since, all movement and fixing of engineering products involved comes from planning, the risk chosen in this category is that of overestimation and underestimation. Overestimation is the false anticipation of the use or effect of the project and its resources. Suppose, the raw materials required for the tunnel manufacturing is estimated to be more than actually required, there may be a cost overrun for the project, the contractor, and government. This spoils the intent of the contractor and the governments’ involvement, which together are not able to ward of such an issue. Underestimation could arise when the project management builds the project on weak estimation, such as low traffic flow and usage of the route and an assessment proving less damage to the environment. These are sincere technical errors and can spoil the projects efficiency and effective implementation. There may be payment conflict arising between the contractor and the government, and even a backlash from citizens for using more-than-anticipated monetary funds for the project.
External risk – External risk may be of an uncontrollable type, one of which is that of the poor economic condition of the market. The project depends on favourable market conditions, for it secures its finances, sub-contractors, and purchase resources at an anticipated value. When market condition suddenly deteriorates, it immediately affects the availability of finance and the market sentiment, which apparently declines (Wang et al., 2004). This can cause financial woes for the project, causing delayed deadlines and loss of confidence. Such a risk is unexpected yet impactful, evident by the global financial crisis of 2008-09 that might have been anticipated but its extent of dent in developing economies was not assumed.