KADUNA’S CNG TRANSPORT INITIATIVE

The state transport model connects mobility with sustainable development, writes SIMON YUSUF

Climate action is often discussed in the language of international agreements, emissions targets and global conferences. Yet some of its most meaningful expressions are found much closer to home, in the buses people board every morning, the roads they travel and the air they breathe.

In Kaduna State, Governor Uba Sani’s deployment of 100 Compressed Natural Gas (CNG) mass transit buses offers a practical illustration of how climate-conscious infrastructure can become part of everyday life. Beyond improving public transportation, the initiative presents an opportunity to reduce transport-related emissions, improve urban air quality and demonstrate how subnational governments can integrate environmental considerations into public service delivery.

The programme is particularly noteworthy because transportation is not merely about moving people from one destination to another. The way a city organises mobility influences fuel consumption, congestion, air pollution, household expenses and the overall environmental quality of urban life.

By introducing high-capacity CNG buses across major urban corridors, Kaduna is pursuing a transport model that connects mobility with the wider objectives of sustainable development.

The scale of the initiative is important. According to the information provided on the programme, the 100 buses operate along major routes, making multiple daily trips between approximately 6am and 6pm.

During their first year of operation, the buses reportedly carried about 3.2 million passengers. Based on an average journey of 12 kilometres, this represents approximately 38.4 million passenger-kilometres of transport service.

These figures illustrate the extent to which the buses have become part of Kaduna’s urban mobility system. They also provide a useful starting point for considering the environmental implications of the programme.

Before their introduction, urban transportation in Kaduna was predominantly characterised by minibuses and tricycles. The deployment of high-capacity buses represents a move towards a more organised mass transit system, with the potential to transport larger numbers of passengers using fewer vehicles.

This matters because the environmental performance of public transportation depends not only on the fuel a vehicle uses, but also on how efficiently it moves people. A well-utilised bus can distribute its fuel consumption and emissions across many passengers, potentially reducing the emissions associated with each passenger’s journey.

The climate benefits are therefore linked to two related changes: the transition from conventional fuels to CNG and the movement towards higher-capacity public transport.

Compressed natural gas offers an alternative to conventional petrol and diesel in transport applications. Under comparable operating conditions, natural gas generally produces less carbon dioxide from combustion per unit of energy than diesel or petrol. Modern CNG vehicles can also reduce certain forms of particulate pollution compared with older, higher-emitting diesel vehicles.

For Kaduna, these characteristics create an opportunity to improve the environmental performance of public transport while continuing to meet the mobility needs of a growing urban population.

Using indicative operational emissions factors, the supplied estimates place the difference between conventional diesel and CNG operation for the fleet at approximately 1,370 tonnes of carbon dioxide equivalent (CO₂e) avoided annually, under the stated operating assumptions.

This estimate should be understood as an indicative comparison rather than a complete measurement of the programme’s climate impact. Actual savings depend on factors including fuel consumption, vehicle utilisation, maintenance, the emissions characteristics of the vehicles being compared and the source of the electricity or fuel used throughout the transport system.

The wider comparison with the minibuses and tricycles that might otherwise carry the same passengers could also produce a different estimate. A comprehensive assessment would need to establish how many conventional vehicles have been displaced, how full the buses are and how their routes compare with previous travel patterns.

Even with these qualifications, the programme offers a practical foundation for measuring how transport investment can contribute to emissions reduction.

The environmental significance of Kaduna’s CNG buses extends beyond greenhouse gases.

Transport-related air pollution can affect the quality of life along busy urban corridors, particularly where large numbers of vehicles operate close to homes, markets, schools and workplaces. Older, poorly maintained vehicles can contribute to particulate matter and other pollutants that degrade local air quality.

A shift towards cleaner-running vehicles, combined with a reduction in the number of individual vehicles needed to carry passengers, can help address some of these pressures.

For commuters, traders, pedestrians and residents living along major routes, the potential benefits include a cleaner urban environment and improved conditions around transport corridors.

These benefits are especially relevant when viewed alongside the economic importance of mobility. Public transport connects people to employment, education, healthcare and commercial opportunities. Making that transport system more organised and environmentally conscious can contribute to a city that functions more efficiently.

However, the scale of any air-quality improvement will depend on actual changes in vehicle use and emissions. Regular maintenance, proper monitoring and the retirement or replacement of highly polluting vehicles would help strengthen the programme’s environmental contribution.

President Bola Ahmed Tinubu’s recognition of Kaduna’s CNG transport initiative as a bold innovation highlights the role state governments can play in translating national development priorities into practical interventions.

Climate action does not occur exclusively at the federal level or through international negotiations. States and local governments make decisions about transport systems, urban planning, waste management, public infrastructure and energy use—all of which influence environmental outcomes.

Kaduna’s experience illustrates how a state-level intervention can contribute to broader conversations about cleaner energy and sustainable mobility.

The initiative also demonstrates the value of integrating environmental objectives with services that citizens use daily. Rather than treating climate action as a separate policy area, governments can incorporate it into transport planning, infrastructure investment and economic development.

For other states considering similar programmes, Kaduna provides a useful case for examining the relationship between fleet size, passenger demand, operating costs, fuel availability and environmental performance. The lessons will be most valuable when supported by transparent operational data and independent assessment of the programme’s results.

Perhaps one of the longer-term opportunities lies in the possibility of developing cleaner fuels from organic waste. Kaduna has agricultural activities that generate residues and other organic materials. With suitable technology, collection systems and investment, some of these resources could potentially be converted into biogas and upgraded to biomethane for use in compatible transport infrastructure.

This possibility could create a connection between agriculture, waste management, renewable energy and public transportation. Instead of treating organic waste solely as a disposal problem, a well-developed system could explore its value as a source of energy. Such an approach would require careful assessment of feedstock availability, production costs, methane leakage, environmental safeguards and the technical requirements of fuel distribution.

The existing CNG initiative does not automatically provide renewable fuel, and conventional natural gas remains a fossil fuel. Nevertheless, compatible infrastructure and institutional experience could offer a starting point for evaluating future alternatives, including biomethane, where technically and economically feasible.

For Kaduna, this is a potential pathway worth examining as part of a longer-term strategy for cleaner transport and resource efficiency.

Ultimately, climate action becomes meaningful when it improves the systems people depend on. In Kaduna, the CNG buses are doing more than transporting passengers across the city: they are creating an opportunity to rethink urban mobility and move towards a more efficient, environmentally conscious transport future. That is the larger promise of climate action in motion.

 Yusuf, writes from Kaduna State