Smarter Routes To A Stable Climate: Efficiency & Reduced Demand in Transport
Smarter routing, lighter vehicles, and new digital tools can dramatically cut transport emissions. This scene highlights contrail-avoiding flight paths, advanced aircraft design enabling battery-powered aviation, high-speed rail, electric and autonomous vehicles, and lightweight urban mobility like bikes and e-bikes. Remote work and emerging telepresence technologies can also reduce the need to travel at all.
We’re a world on the go — and that comes with steep climate costs. Transportation is responsible for nearly a quarter of global emissions, and rising. We can’t and won’t stop moving — so how do we cut emissions? Besides sustainable fuels and vehicle electrification, reducing demand and optimizing efficiency are important avenues to cleaner transport. The good news: some of the most powerful solutions don’t require waiting for new fuels or fleets — they come from using what we already have, just smarter. AI-driven logistics, contrail avoidance software, and telepresence technologies are some promising paths forward — and who knows what new approaches could be waiting in the wings? One thing is clear: innovation in this area will ensure we can continue to move people and goods without driving the climate off course.
Using IPCC and GCAM data, Energy Innovation projected future “greenhouse gas emissions at stake” in 2050, assuming current policies remain in place. The resulting estimates overlap because different technologies may reduce the same emissions pool.
The Path We’re On
Transport emissions are moving in the wrong direction.
Humanity is more mobile than ever before. Billions of people and products move across cities, countries, and continents every day. This unprecedented mobility underpins economic growth and opportunity — but we’re also paying a steep climate price.
If we don’t course-correct, global transport demand could double by 2050, with emissions rising by as much as 60%. Aviation, shipping, and heavy freight — sectors that are hard to decarbonize — will be key contributors to this upward trend. Rapid urbanization in emerging markets further risks locking in decades of car-dependent, high-emission infrastructure. Maintaining the status quo would not only accelerate the climate crisis but also worsen congestion, air pollution, and public health challenges in cities worldwide.
A New Way Forward
Moving towards more responsible transport
We need to change course. As individuals and communities, that means shifting more trips to walking, biking, or electrified mass transit — and choosing transport modes that match the job to be done. Not every urban errand needs a two-ton vehicle. In many cities, investments in bike lanes, bus rapid transit, and safer pedestrian infrastructure are already unlocking rapid growth in cycling, cargo bikes, and other light electric urban vehicles that can move people and goods far more efficiently than cars or trucks.
Where other forms of transport are essential, vehicle electrification and sustainable fuels remain critical to decarbonizing this mega-emitting sector. But one of the fastest ways to align transport with climate goals is to move less, and with more intention. Smarter routing, lighter materials, and reduced travel demand can together cut billions of tons of emissions while saving time and money. Innovation is needed to help scale these gains. The imperatives and moonshots below represent the most promising near- and longer-term routes to a more efficient transport system.
Innovation Imperatives
Create route-planning systems to control aviation contrail warming effects
Contrails — ice clouds formed by aircraft — can trap heat in the atmosphere and significantly amplify aviation’s climate impact. New route-planning tools that integrate weather data, satellite observations, and AI could help pilots adjust altitude or flight paths to avoid the atmospheric conditions that generate the most warming contrails. Scaling these systems would allow airlines to reduce the non-CO₂ climate effects of flying with minimal changes to infrastructure or aircraft. Fully implementing this imperative will require coordination across regulators, airspace managers, and airlines — making contrail mitigation both a technical challenge and an institutional one.
Develop new aircraft and ship designs to enable clean long-haul aviation and maritime fleets
Breakthroughs in the craft itself would be a game-changer for decarbonized transport. Advanced designs — such as ultra-light airframes, novel hull shapes, and hybrid architectures like wind-assisted propulsion — could make long-haul travel more viable with battery technologies and other cleaner propulsion mechanisms. While still highly experimental, breakthroughs here would redefine aviation and shipping, enabling global connectivity without the carbon cost
Advance virtual technologies to reduce travel demand
Business travel and commuting remain major drivers of transport emissions, but not all journeys are necessary. Next-generation telepresence technologies — such as holograms, immersive virtual reality, and ultra-high-definition conferencing — can replace in-person meetings with realistic remote experiences. As these systems become more seamless, affordable, and widespread, they hold the potential to reduce travel demand, cutting emissions while saving time and costs for individuals and businesses.
Moonshots
Create systems matching or exceeding aircraft speeds
Air travel dominates long-distance passenger transport — but it comes with a hefty climate toll. Ultra-high-speed ground systems like hyperloop or maglev rail envision aircraft-level speeds with a fraction of the emissions, moving people quickly between hubs while avoiding airport congestion. Such systems could transform global mobility — making clean, rapid intercity travel a reality.
The most viable solutions will:
Efficiency improvements must be evaluated across the full transport system — including lifecycle emissions, rebound effects, induced demand, and value-chain shifts. Without system-wide analysis, localized gains can evaporate or even increase total emissions.
Transport operators — airlines, freight carriers, shipping companies, transit agencies — optimize ruthlessly for cost and reliability. If a solution doesn’t reduce fuel burn, lower maintenance, or shrink dwell times, adoption is likely to stall.
