The transformative role transport can play in mitigation and adaptation
by Stephane Hallegatte and Mook Bangalore
Priority on Transport
This Connections note highlights the importance of the transport sector for climate change, with findings and data drawn from the recently released report Shock Waves: Managing the Impacts of Climate Change on Poverty. The report stresses the transformative role transport can play in rural and urban areas in supporting effective climate change adaptation and mitigation strategies. Poor rural roads mean that when floods occur farmers cannot get their goods to urban markets, creating price spikes for the urban poor and slashing household incomes in rural areas. A lack of affordable public transportation options in developing country cities means that lower-income residents tend to cluster in neighborhoods more exposed to recurrent and extreme weather events.
As the Shock Waves report points out:
Policies are needed now to make development and climate change stabilization compatible: modern living standards will need to be supported in a more efficient and radically less carbon-intensive way … Priority should go to implementing the policies and measures that are urgently needed to prevent irreversibility and lock-ins into carbon-intensive patterns (such as those regarding deforestation, energy infrastructure, or urban transport).
The issues raised by global climate change—threats to food security, increasing vulnerability to weather extremes, and health risks of urban pollution to name just a few—have linkages to the availability of reliable, affordable transport. Cities in many developing countries are only now planning to build or expand their transport infrastructure; now is the ideal time for support and interventions that promote climate-smart and low-carbon planning.
Transport, Climate Change, and Food Security
Climate-related damage to agricultural production regularly sends food prices soaring, disproportionately harming poor people. In 2010, flooding in Pakistan inundated more than 7,700 square miles of land and sent wheat prices up by 50 percent. Flooding in Guatemala caused by tropical storm Agatha in 2010 severed routes linking rural and urban areas, preventing food from reaching markets.
The corollary is also true: transport can play a role in buffering climate change impacts. For instance, in Burkina Faso, better access to markets has been found to reduce the volatility of maize prices.
Improving transport has long been a development priority. Better connectivity can improve access to finance (making banks more accessible), to health care (making hospitals more accessible), and to places of employment (making jobs more accessible). This, in turn, helps people cope with environmental and climate shocks. The positive impact of transport on the climate change agenda is an important addition to the list of benefits from better connectivity. Better transport links help climate-affected areas replace local shortages by trading with less affected areas; in disaster situations, they provide evacuation routes. Thus the existing agenda of improving rural access directly contributes to reducing vulnerability to climate change.
Transport Helps Make Cities Safer
Some four billion people live in urban areas today, more than quadruple the number in 1950. In cities such as Mumbai, India, and Ho Chi Minh City, Vietnam, poor residents tend to settle in neighborhoods that are less expensive but also more exposed to hazards like floods and storms. A World Bank survey of poor households in flood-prone areas of Mumbai found that more than 75 percent reported lost work time due to flooding of unpaved roads in the rainy season. Respondents in Ho Chi Minh City reported that flooded roads made low-income factory workers late, resulting in lost wages and fines. Asked what it would take for residents to relocate to safe areas in Mumbai, more than half responded that they would relocate to a safer area if they had access to inexpensive transport, health services, schools, and social networks.
The take-away is that land use planning to restrict development in risky areas and encourage it in safe areas can succeed only if the restrictions are accompanied by investments in transport and other infrastructure to make it possible for people access to the same or comparable jobs and services.
For the cities of the future, well-designed transit-oriented development interventions—taking into account natural risks—can ensure that growing cities generate economic gains and jobs without increasing exposure to natural risks. The World Bank Group is leading efforts to make hazard data more available to developers and urban planners through the online platform Geonodes.
Transport Policies and Climate Change
Infrastructure decisions taken today are largely irreversible and will shape the city’s urban form for the next century and beyond. While transport infrastructure is undoubtedly expensive, sound planning up front is far less expensive than retrofitting a carbon-intensive city with cleaner transport options. Many growing cities in emerging economies have just such an opportunity today to prioritize transit-oriented development and plan efficient and robust systems from the ground up. This approach delivers many benefits: fewer cars with less congestion and accidents; higher economic efficiency and productivity; and lower vulnerability to disasters. A more energy-efficient city improves energy security by mitigating the effects of rising oil prices. Better still, climate-smart cities give people and firms alternatives to increasingly expensive carbon-based modes of transport, thus increasing the political feasibility of climate mitigation policies and the investment they require.
Countries are taking notice: 68 percent of countries include transport in their “Nationally-Determined Contribution” to climate change adaptation and mitigation they committed to in Paris. The far-reaching benefits of efficient transport—benefits that go beyond climate change and extend to public safety and sustainable economic growth—justify this commitment.
For more information on this topic:
Hallegatte, Stephane, Mook Bangalore, Laura Bonzanigo, Marianne Fay, Tamaro Kane, Ulf Narloch, Julie Rozenberg, David Treguer, and Adrien Vogt-Schilb. Shock Waves: Managing the Impacts of Climate Change on Poverty. Washington, DC: World Bank, 2016. Climate Change and Development Series.
United Nations. World Urbanization Prospects: The 2014 Revision, Highlights. New York: Department of Economic and Social Affairs, Population Division, 2014.
 Stephane Hallegatte et al., Shock Waves: Managing the Impacts of Climate Change on Poverty (Washington, DC: World Bank, 2016), 23.