Transport infrastructure is vital to developing countries because efficient and reliable transport networks are critical for local and international trade.
Transportation infrastructure, such as roads and railway systems, is one of the sectors most threatened by climate change. Extreme weather events such as flooding, sea-level rise, and storm surge have repeatedly wreaked Havoc on transport networks.
In Africa, extreme weather is a threat that can cause extensive structural damage. It can also accelerate the aging of infrastructure components which can lead to significant financial losses.
For instance, a recent report on Tanzania uncovered the vulnerability of the country’s transportation systems. Long stretches of road and rail networks are exposed to extreme flooding events, with growing exposure in the future.
The report estimated that worst-case disruptions to Tanzania’s multi-modal transport networks could cause losses of up to US$1.4 million per day. In addition, damage to these networks can disrupt the flow of goods and people, thereby lowering economic productivity.
This suggests that governments must ensure that transport infrastructure is developed with the ability to cope with current and future climatic shifts.
Fortunately, an effective way to “climate-proof” transport infrastructure already exists within the planning machinery of governments.
Environmental impact assessment is a widespread environmental safeguard. It’s used by governments, donors, and lending agencies when approving new development projects or major expansions to existing ones. The process can be used to identify climate risks and ensure that they are minimized through environmentally sound project design.
Transport relies almost entirely on oil with about 94% of transport fuels being petroleum products. This makes it a key area of energy security concern. Oil is also a major source of harmful emissions that affect air quality in urban areas. Exposure to vehicle exhaust emissions can cause cardiovascular, pulmonary, and respiratory diseases and several other negative health impacts.
Therefore Environmental impact assessment is the essential process of identifying, predicting, and evaluating the likely environmental impacts of proposed development activities, both positive and negative. These are risks to the project, and risks to the natural environment from the project.
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The assessment is meant to happen before major decisions are taken and commitments made. Developers, both private and public, often commission registered environmental experts to carry out the study.
Virtually every country has some form of legislation that requires an environmental impact assessment. These are carried out on certain development projects, particularly those likely to have significant effects on the environment. This often includes major transport infrastructure.
The study culminates in a set of observations and recommendations, which regulators and developers are meant to take on board. Legislation usually provides for follow-ups on whether they were. In countries with strong institutional frameworks, violators often face fines, suspension of operations, or even jail time.
A US$14.2 billion Tanzanian Standard Gauge Railway investment by the Tanzanian government, is currently under construction. It’s part of the Central Corridor that will connect Tanzania, Uganda, Rwanda, and the Democratic Republic of Congo. It will also provide access to the Indian ocean. The government contracted a Turkish firm, Yapi Merkezi, to design and build the project’s first phase, traversing about 541km. Work started in 2017.
Because it is vulnerable to climate change there were particular concerns over flooding and landslides the environmental impact assessment has tried to prepare the project for potential climate risks.
The assessment was conducted by a multidisciplinary team under an international consulting firm, Environmental Resources Management. They carried out climate projections along the proposed route and outlined adaptation measures for the projected risks.
The use of heat-resistant asphalt, installing flood defense walls and using reinforced steel were highlighted as recommendations. They also proposed a monitoring plan which outlined key monitoring aspects, indicators, responsible parties and timing.
Climate change issues are not explicitly prescribed by Tanzanian environmental impact assessment law and regulations. The drive to carry out the assessment was a result of pressure from climate-sensitive international lenders. It remains to be seen if the recommendations are implemented throughout construction and following project phases.
Our study demonstrates the huge potential of environmental impact assessments to foster adaptation in transport projects. It makes sense. Most African countries lack the necessary resources to invest in stand-alone adaptation projects.
Roadblocks to remove
Even though integrating climate change adaptation into an environmental impact assessment is a simple step, it’s not being done.
This is due to several challenges including a lack of knowledge, awareness, technical and financial resources, and legislative support. Tanzania’s laws and regulations, for instance, do not specifically mandate the practice.
Moreover, developers seldom go beyond what the law requires. Because of factors such as costs or time constraints, they would naturally view such requirements as unwelcome. Additional project approval processes could lead to delays and increased costs for the developer.
Climate proofing and adaptation will require substantial infrastructure investments. This will generate additional freight transport if implemented outside of the normal infrastructure maintenance and upgrade cycle.
Climate proofing of transport infrastructure can take many forms, varying in the amount of additional freight
movement required. Resurfacing a road with more durable materials to withstand greater temperature extremes may require no additional freight movement, whereas re-routing a road or rail link, or installing flood protection, is likely to generate additional logistics demands, which have yet to be quantified.
To ensure projects are “climate-proofed” in the future, several steps must be taken.
First, laws and regulations must be formalized so that climate change is included in the assessment process. These must be supported by technical guidelines and strategic planning.
Second, there’s a need to make substantial investments in building capacity and raising awareness at the institutional level. In addition, climate data must be available and communication between climate scientists and assessment practitioners should be strengthened.
Finally, our paper calls for adaptation aid providers, development partners, and international lenders – such as the World Bank, Africa Development Bank and the IMF – to leverage their influence, for instance through funding procedures. This would add pressure to include climate change scenarios in the planning process.