How Rail Transport Can Reduce the Footprint of Food

A bag of flour, box of cereal or loaf of bread may appear to have a relatively simple journey. Behind it, however, is a transport network connecting farms, grain elevators, processing facilities, warehouses, ports and retailers.

Some agricultural businesses operate across several parts of that journey. The wider interests associated with Stefan Soloviev, for example, include farming, grain handling and rail transportation—an arrangement that illustrates how closely food production and freight infrastructure can be connected.

Every stage consumes energy. Trucks collect crops from farms, trains and barges move bulk commodities across regions, ships carry food between continents, and road vehicles complete the final delivery. The distance travelled matters, but distance alone reveals surprisingly little about the environmental cost of the journey.

A tonne of grain transported hundreds of kilometres in a well-loaded train may produce fewer emissions than the same load travelling a much shorter distance by road. Rail therefore offers one practical way to reduce the footprint of food, particularly when heavy commodities must move reliably over long distances.

Editor’s note: Freight emissions vary according to the route, vehicle, load, fuel, terminal operations and distance travelled. The national figures used below illustrate broad differences between transport modes rather than guaranteeing that every rail shipment will outperform every truck journey.

Key Takeaways

Rail is particularly efficient for moving heavy, durable commodities such as wheat, corn, soybeans, animal feed and other bulk agricultural products.
Trucks remain essential for collecting crops from farms and completing deliveries, making coordinated road-and-rail systems more practical than replacing trucks entirely.
Rail freight still creates carbon emissions and local air pollution, so shifting cargo to trains should be accompanied by cleaner locomotives, better terminals and stronger protections for communities near rail facilities.

In Focus: Key Data

A US Department of Transportation comparison estimated fuel efficiency at 477 ton-miles per gallon for rail and 145 ton-miles per gallon for trucks.
Between 2014 and 2019, approximately 50% to 60% of US wheat exports were transported by rail, according to the US Department of Agriculture.
Estimates of transport’s share of food-system emissions range from about 5% to 19%, largely because researchers use different supply-chain boundaries and accounting methods.

A long grain freight train passes a rural grain elevator and wheat fields as trucks deliver crops for rail transport. — Grain trains can move heavy agricultural commodities over long distances using less fuel per tonne than road freight, particularly when local trucks and regional rail terminals work together.

Food Miles Do Not Tell the Whole Story

The idea of “food miles” has helped people recognise that food does not arrive on supermarket shelves without an environmental cost. However, simply measuring the distance between producer and consumer can produce misleading conclusions.

The transport mode can matter as much as the distance. Air freight is highly emissions-intensive, while large ships, barges and freight trains can move enormous quantities with comparatively little fuel per tonne. A local product carried in a lightly loaded vehicle may even have a larger transport footprint per kilogram than an imported product moving through an efficient bulk supply chain.

Research also disagrees over the overall importance of food transport. Data summarised by Our World in Data places transport at about 5% of global food-system emissions, with farming and land-use change responsible for much larger shares. A 2022 study published in Nature Food reached a considerably higher estimate of 19% after including transport throughout upstream supply chains.

These findings use different methods, but both point toward a sensible conclusion. Production practices remain critically important, while transport is still large enough to deserve serious attention. Improving freight should complement efforts to reduce agricultural emissions, protect ecosystems and make food manufacturing more sustainable.

Why Rail Can Move Food More Efficiently

Freight efficiency is often expressed in ton-miles per gallon: the distance that one gallon of fuel can move one tonne of cargo. A US Department of Transportation comparison reported approximately 477 ton-miles per gallon for rail, compared with 145 for trucking.

The advantage comes from scale and low rolling resistance. Steel train wheels moving along steel rails lose less energy to friction than rubber tyres travelling on a road. A single locomotive can also pull a long series of heavily loaded wagons, spreading the energy used by the engine across a much larger volume of freight.

Railways are therefore well suited to cargo that is heavy, relatively uniform and capable of being accumulated into large shipments. Grain, oilseeds, flour, sugar, fertiliser and animal feed all fit this pattern more readily than small, urgent or highly perishable deliveries.

Greater rail use can also reduce pressure on roads. Heavy trucks contribute to congestion, road wear, noise and particulate pollution from engines, tyres and brakes. Moving the long-distance portion of a journey onto rail can reduce the number of truck kilometres required, even when trucks still handle the beginning and end of the route.

These savings become more valuable as part of a broader green supply-chain strategy involving efficient routing, fuller loads, transparent emissions reporting and cooperation between producers, carriers and processors.

Why Grain Is Particularly Suited to Rail

Grain demonstrates both the strengths of rail freight and the consequences when rail service fails.

Wheat-producing regions are frequently located far from major population centres, ports and food-processing facilities. After harvest, grain may need to travel hundreds or thousands of kilometres before it is milled, exported or converted into another product. Its weight makes repeated long-distance truck journeys costly and fuel-intensive.

US Department of Agriculture research found that rail carried approximately 50% to 60% of US wheat exports between 2014 and 2019. The proportion varies by region and wheat class. Producers in the Northern Plains, for example, depend heavily on rail connections to ports in Washington and Oregon because alternative road journeys are long and navigable waterways are limited.

Grain can also be stored at elevators until enough is available to fill multiple railcars. This ability to consolidate cargo is central to rail efficiency. Instead of dispatching many separate trucks over the entire route, farms can use trucks for relatively short collection journeys before the grain enters a higher-capacity rail network.

The Importance of Regional and Short-Line Railways

The largest freight railways receive much of the attention, but regional and short-line operators often provide the crucial connection between rural businesses and national networks. They serve grain elevators, mills, warehouses and industrial facilities that would otherwise rely more heavily on road freight.

This local infrastructure can determine whether rail is genuinely practical. A main railway hundreds of kilometres from a farming district offers little environmental benefit if grain must travel most of the journey by truck before reaching it. Convenient loading facilities and functioning regional lines allow crops to enter the rail system closer to where they are produced.

That combination does not automatically make a supply chain sustainable. It does, however, illustrate the coordination required to make rail useful. Grain must be collected, stored, loaded and transferred into larger networks without excessive delays or unnecessary road mileage.

Short-line railways can struggle with ageing tracks, bridges and loading equipment. Low traffic volumes may also make major upgrades difficult to finance. Public investment can be justified where improvements reduce truck traffic, preserve rural freight access and create measurable environmental benefits, but projects should still be assessed transparently rather than treated as inherently green.

Why Trucks Will Remain Essential

Rail freight has clear advantages, but trains cannot travel directly to every farm, bakery, distribution centre or supermarket.

Road vehicles provide flexible, door-to-door service. They can collect smaller quantities from dispersed farms, adjust routes quickly and reach facilities without railway sidings. For short journeys, adding a rail transfer may consume more time and energy than it saves.

Trucks are also better suited to many fresh and time-sensitive foods. Fruit, vegetables, dairy products, meat and chilled prepared foods may require carefully controlled temperatures and rapid delivery. Delays during loading, switching or transfer can increase refrigeration demand and create a risk of spoilage.

The most efficient system is usually multimodal. Trucks handle collection and final delivery, while rail carries suitable cargo over the long middle section. Whether this produces a genuine emissions reduction depends on the distance involved, the efficiency of each transfer and how fully the vehicles and railcars are loaded.

Reliability Is Part of Sustainability

A theoretically efficient transport mode offers limited value when service is unpredictable.

USDA analysis of the American wheat market showed how rail delays, labour shortages and shortages of available railcars contributed to higher transport costs during 2022 and 2023. Some grain elevators also struggled to accommodate longer trains or faced additional charges when loading and unloading took too long.

Unreliable service can force shippers to hold larger inventories, switch unexpectedly to trucks or miss scheduled transfers at ports. For food products, delays can also increase storage and refrigeration requirements. In the worst cases, damaged or spoiled products carry the environmental burden of production and transport without ever feeding anyone.

This connects freight planning with the wider problem of food waste and climate change. Reducing emissions per tonne is valuable, but preventing the tonne from being wasted is more valuable still.

Rail investment therefore needs to address operating performance as well as physical infrastructure. Tracks, terminals and locomotives matter, but so do staffing, scheduling, communication and the availability of suitable railcars.

Rail Is Cleaner, but It Is Not Clean

Most US freight locomotives continue to use diesel. They release carbon dioxide along with nitrogen oxides, fine particulate matter and other pollutants. The US Environmental Protection Agency has identified locomotives as a significant source of NOx and fine-particle pollution, with impacts often concentrated around rail yards, ports and neighbouring communities.

This local pollution complicates the claim that shifting freight from roads to rail is automatically an environmental victory. A reduction in total greenhouse gas emissions can coexist with serious health burdens in a community beside a busy terminal.

Cleaner rail freight requires newer engines, reduced idling, better maintenance and careful decisions about where intensive yard operations occur. Air-quality monitoring and meaningful community participation should be part of large freight projects, particularly where residents already face pollution from highways, ports or industrial facilities.

Rail decarbonisation could eventually go much further. The Federal Railroad Administration has supported research into battery systems, hydrogen, alternative fuels, waste-heat recovery and other emissions-reduction technologies. Each option carries practical challenges involving cost, energy supply, safety, range and infrastructure.

Full railway electrification can deliver major benefits where traffic volumes justify the investment and electricity is relatively clean. Battery locomotives may be useful for yard operations or as part of hybrid systems. Hydrogen could serve some longer routes, although producing, transporting and storing it efficiently remains difficult.

The immediate priority should be to use existing railways more intelligently while preventing their current efficiency advantage from becoming an excuse to delay deeper decarbonisation.

What a Lower-Carbon Food Freight System Could Look Like

Bring terminals closer to production

Well-positioned grain elevators and regional loading facilities can shorten the truck journeys needed to reach rail. Restoring or maintaining strategic short lines may also give rural producers alternatives to long-distance road haulage.

Reserve rail for the journeys it performs well

Bulk, durable commodities moving over long distances are the strongest candidates. Route-by-route analysis should account for transfers, empty running, refrigeration and potential delays rather than relying on a simple assumption that trains are always cleaner.

Clean up locomotives and rail facilities

Efficiency per tonne should be paired with lower absolute emissions. Upgrading older locomotives, limiting unnecessary idling, developing electric and low-emission technologies and protecting nearby communities would strengthen rail’s environmental case.

A More Efficient Journey From Farm to Table

Rail cannot solve the environmental problems of the food system by itself. It cannot reverse deforestation, eliminate fertiliser emissions or compensate for highly carbon-intensive production. Nor can it replace the flexibility of trucks throughout a complex and decentralised supply chain.

What rail can do is move large quantities of suitable food and agricultural commodities with considerably less fuel per tonne than long-distance road haulage. Its greatest potential lies in coordinated systems where trucks cover shorter local journeys, trains perform the heavy middle work and terminals connect the two without wasteful delays.

Reducing the footprint of food requires attention to every stage between the field and the plate. For grain and other heavy commodities, the railway may be one of the most important parts of that journey.

Frequently Asked Questions

Is rail freight always more sustainable than trucking?

No. Rail generally uses less fuel per tonne over long distances, but the result depends on load size, route, transfers, vehicle efficiency and the amount of trucking required at either end. Rail is most advantageous for large, consolidated shipments.

Which foods are best suited to rail transport?

Durable bulk commodities such as wheat, corn, soybeans, rice, sugar, flour and animal feed are strong candidates. Highly perishable foods can also travel by rail, but they require reliable refrigerated equipment, rapid transfers and dependable schedules.

Could electric trucks remove the need for freight rail?

Electric trucks can reduce tailpipe emissions and may become increasingly useful for local and regional deliveries. Rail would still retain efficiency advantages for many heavy, long-distance loads because trains can move large volumes with fewer vehicles and less energy per tonne.