Reducing Your Freight Carbon Footprint

Freight transportation accounts for roughly 8% of global greenhouse gas emissions, and the pressure on shippers to reduce their transportation carbon footprint is intensifying — from investors, customers, regulators, and increasingly, from their own supply chain partners. The good news is that many of the strategies that reduce emissions also reduce costs.

This guide covers how to measure your freight carbon footprint, practical strategies to reduce it, carrier sustainability programs, the EPA SmartWay partnership, and how to build a credible sustainability program that delivers both environmental and financial results.

Measuring Your Freight Carbon Footprint

You cannot reduce what you do not measure. Start by calculating your Scope 3 transportation emissions:

• Data collection: Gather 12 months of shipment data including mode, origin, destination, weight, and distance. Your TMS or freight payment records should provide this.
• Emission factors: Apply standard emission factors by mode. The EPA provides emission factors per ton-mile: truck (161.8g CO2/ton-mile), rail (15.4g), ocean (7.7g), and air (1,232g).
• Calculate baseline: Multiply each shipment's weight x distance x emission factor to get CO2 equivalent emissions. Sum across all shipments for your annual transportation carbon footprint.
• Identify hotspots: Which lanes, modes, and carriers contribute the most emissions? Long-haul OTR truck lanes and any air freight lanes will typically dominate your carbon footprint.

High-Impact Reduction Strategies

Ranked by typical emissions reduction impact:

• Mode shift to rail/intermodal (60-75% reduction per lane): Intermodal shipping on lanes over 750 miles reduces emissions by 60-75% compared to OTR trucking. This is the single highest-impact strategy for most shippers.
• Eliminate air freight (90%+ reduction per lane): Air freight emits 7-8x more CO2 than trucking per ton-mile. Every shipment you can convert from air to ground dramatically reduces your footprint.
• Load optimization (10-20% reduction): Shipping full trucks instead of partial loads means fewer trucks on the road. LTL consolidation into truckloads is both a cost and emissions strategy.
• Network optimization (5-15% reduction): Positioning inventory closer to customers reduces average shipping distance. A two-FC network vs. single FC can reduce total transportation miles by 20-30%.
• Route optimization (5-10% reduction): Efficient multi-stop routing reduces total miles driven. Route optimization software can cut route miles by 15-25% for delivery operations.
• Packaging reduction (3-8% reduction): Lighter, smaller packaging means less weight per shipment and more units per truck. Every pound of packaging eliminated is a pound that does not need to be transported.

EPA SmartWay Partnership

SmartWay is the EPA's voluntary program for freight transportation efficiency. It provides tools, data, and recognition for reducing transportation emissions:

• For shippers: SmartWay Shipper Partners commit to measuring their freight emissions and preferentially using SmartWay carriers. The SmartWay FLEET tool calculates your transportation carbon footprint.
• For carriers: SmartWay Carrier Partners report their fleet fuel efficiency and emissions. Carriers are scored and ranked, giving shippers data to select more efficient carriers.
• Benefits: SmartWay partnership provides credibility for your sustainability claims, access to benchmarking data, a carrier scoring framework, and recognition through the SmartWay Excellence Awards.
• Cost: SmartWay membership is free. The cost is the staff time to collect data and submit annual reports.

Carrier Selection for Sustainability

Not all carriers are equal in terms of environmental performance. Evaluate carriers on:

• Fleet age and technology: Newer trucks with EPA 2010+ engines are significantly cleaner than older equipment. Some carriers are adopting natural gas (CNG/LNG) trucks that reduce CO2 by 20-25% and near-zero emissions vehicles.
• SmartWay scoring: Use SmartWay carrier performance data to compare carriers' fuel efficiency and emissions on a standardized basis.
• Idle reduction: Carriers that use auxiliary power units (APUs) or automatic engine idle-shutdown reduce fuel consumption by 5-8% and emissions proportionally.
• Speed management: Carriers that govern truck speeds at 62-65 mph burn significantly less fuel than those running at 70+ mph. Speed governors reduce fuel consumption by 5-10%.
• Electric vehicle plans: Ask carriers about their EV transition plans. Battery-electric trucks are beginning to enter the market for short-haul routes, and hydrogen fuel cell trucks are in development for long-haul.

Reporting and Communication

A sustainability program without reporting is a sustainability hobby. Formalize your program with:

• Baseline year: Establish a baseline year against which you measure progress. Common choices are the most recent complete year of data.
• Targets: Set specific, time-bound emissions reduction targets. Example: “Reduce Scope 3 transportation emissions by 20% per ton-mile by 2030 versus 2024 baseline.”
• Annual reporting: Measure and report your transportation emissions annually. Align with established frameworks like GHG Protocol, CDP, or TCFD for credibility.
• Customer communication: Share your sustainability data with customers who request it. Many large retailers and manufacturers now require Scope 3 emissions data from suppliers as part of their own reporting obligations.

Carbon Offsets

Carbon offsets — purchasing credits that fund emissions reduction projects elsewhere — are a supplement to, not a substitute for, direct emissions reduction. Use offsets only for emissions you cannot eliminate through operational changes. Prioritize certified offsets (Gold Standard, Verified Carbon Standard) and be transparent about what portion of your carbon reduction comes from offsets versus operational improvements.

Green Your Freight with Expert Help

A freight dispatch partner can help you identify the lanes where mode shift, consolidation, and carrier selection changes deliver the biggest environmental and financial returns. Request a quote to start building a greener freight strategy.

Frequently Asked Questions