New research reveals that automatically controlling vehicle speeds to ease traffic congestion at intersections could reduce carbon emissions by between 11 and 22 percent. The findings highlight the potential of eco-driving technologies to play a key role in lowering transport-related pollution.
Smart speed control eases traffic flow
The study focused on using automated systems to adjust vehicle speeds in real time, preventing stop-and-go driving patterns that commonly occur near intersections. By smoothing traffic flow, these systems reduce unnecessary acceleration and braking, which are major contributors to higher emissions and fuel consumption.
Significant carbon savings demonstrated
Researchers tested the approach in simulations and real-world trials, finding that optimising speeds cut carbon dioxide emissions by up to 22 percent in some scenarios. Even the lower end of the range—11 percent—represents a meaningful reduction given the scale of road transport’s environmental impact worldwide.
Implications for urban mobility and climate goals
Transport is a significant source of global greenhouse gases, and strategies that reduce emissions from vehicles are essential to meet climate targets. Eco-driving technologies like automated speed control offer a promising, scalable way to improve urban air quality while supporting smoother traffic management.
Potential for integration with existing systems
The research suggests that these measures can be integrated with current traffic management infrastructure and increasingly common in-vehicle systems. Widespread adoption could enhance the effectiveness of smart city initiatives aimed at reducing congestion and emissions simultaneously.
Next steps and challenges
While results are encouraging, challenges remain in scaling the technology, including costs, driver acceptance, and infrastructure upgrades. Further studies are needed to assess long-term benefits and impacts across diverse traffic conditions.
A tool for sustainable transport
As cities seek sustainable solutions to transport emissions, eco-driving measures such as automated speed regulation at intersections represent a practical and impactful option. Combined with broader efforts on electrification and modal shifts, they can contribute significantly to carbon reduction goals.
REFH – Newshub, 9 August 2025
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