2026 State of Sustainable Fleets Market Brief Highlights Diversification

The commercial transportation industry is navigating economic pressures, shifting regulations, evolving technologies, and changing customer expectations that are reshaping how fleets operate and plan for the future. The 2026 State of Sustainable Fleets Market Brief, which is sponsored by Penske Transportation Solutions, described today’s market as “the most complex operating environment in modern trucking history.”

“The transportation industry has always adapted. What’s different now is the pace of change and the number of variables fleets have to evaluate at once,” said Paul Rosa, senior vice president of procurement and fleet planning at Penske Truck Leasing, while speaking during a press conference announcing the latest Market Brief.

How Fleets Are Using Technology Diversification To Manage Uncertainty

According to the Market Brief, fleets are evaluating how different technologies can fit into their operations. In many cases, fleets are deploying a mix of diesel efficiency technologies, renewable fuels, natural gas, battery-electric vehicles, propane and AI-enabled operational tools.

Fleets managing total cost of ownership across multiple technologies are often better positioned to absorb market disruptions, whether those are driven by tariffs, regulatory changes, fuel price volatility or geopolitical events, and Rosa said fleets need to prepare for multiple scenarios simultaneously.

“You have to be nimble,” Rosa said. “You have to have multiple solutions ready to put in motion and then adjust accordingly. That’s the only way fleets can handle the level of uncertainty in the market right now.”

Tariffs, Freight Softness and Policy Shifts Are Driving Up Fleet Costs

The Market Brief describes a market shaped by both operational pressure and policy volatility. Freight demand remains soft, while tariffs and regulatory changes are increasing vehicle and component costs. The report also noted the increasing cost of diesel-powered Class 8 trucks, and said tariffs could add as much as $35,000 to the cost of a new truck in some cases.

The industry has also seen changes in the cost of alternative-fuel vehicles, driven in part by changes to federal policies, including the expiration of commercial zero-emission vehicle tax credits and the rollback of several federal emissions initiatives. However, several funding opportunities remain available through state, local and utility programs. The report estimates that more than $5 billion in annual clean transportation funding will remain available through 2028 despite reductions in federal programs.

Renewable Diesel, Biodiesel and Natural Gas Remain Viable Diesel Alternatives

Fleets are seeking out drop-in alternatives to traditional diesel. Renewable diesel and biodiesel adoption continued to expand, particularly in California, where the fuels displaced a large share of conventional diesel use. Natural gas vehicles also maintained a role in some fleet operations, supported by renewable natural gas availability and newer engine platforms capable of delivering diesel-equivalent performance.

Battery-Electric Vehicle Adoption Grows 21% in Medium and Heavy-Duty Segments

Battery-electric vehicle (BEV) registrations in the medium-duty (MD) and heavy-duty (HD) segments grew by 21% in 2025, and fleets operating MD BEVs reported operational cost savings compared to the vehicles they replaced. Additionally, 54% of fleets in the annual survey said they intend to increase their use of BEVs in the next two years.

AI-Powered Fleet Management Tools Improve Uptime, Efficiency and Sustainability

Artificial Intelligence (AI) is also becoming more integrated into day-to-day fleet operations. About half of the surveyed fleets reported using AI for route optimization, dispatching, predictive maintenance, and diagnostics. Fleets using those tools reported improvements in uptime, asset utilization and operating efficiency.

“This year’s Market Brief accurately captures the continuing use of AI in fleet technology and how it allows fleets to drive enhanced fleet and MPG performance and, ultimately, sustainability,” Rosa said.

Autonomous Freight Technology Moves From Curiosity To Real-World Evaluation

The report highlighted growing interest in autonomous freight operations, which depend on AI. “We’ve been immersed in autonomous technology since 2020 and have had opportunities to evaluate multiple platforms,” Rosa said. “Now the conversation is shifting from curiosity to understanding how the technology could fit into real-world operations.”

Hydrogen Fuel Cell Vehicles Face Infrastructure and Cost Challenges

Hydrogen, which is in its early stages, remains one of the more challenging pathways. Hydrogen fuel cell vehicle registrations declined in 2025 amid infrastructure limitations, funding reductions and higher operating costs.

Still, Rosa said the technology itself continues to show promise for certain applications. “The technology can handle the application. It can handle the job,” Rosa said. “The challenge is the ecosystem — infrastructure availability, fuel cost and total cost of ownership. Those are the same types of challenges battery-electric vehicles faced in their early stages.”

Matching the Right Fleet Solutions to Each Unique Operation and Use Case

Rosa said the key is for fleets to review their overall operations to determine which solutions work across their different use cases. “Every customer application is different, and there’s going to be a different strategy depending on the operation, the route and the customer’s long-term goals,” he said.

Penske Truck Leasing and Penske Energy can help fleets evaluate the solutions that best fit their unique duty cycles, sustainability goals and total cost of ownership requirements. Contact us today to learn more.