The California Air Resources Board (CARB) proposed an emergency action to continue enforcing engine emissions regulations because it says federal government efforts to undo them could result in the sale of vehicles that are not certified to any standard.

As California’s lawsuit continues against the Trump administration, challenging the presidential executive order in January directing federal agencies to terminate state emissions waivers and a resulting revocation of those waivers through the Congressional Review Act (CRA) signed into law in June, CARB said it wants to provide regulatory certainty and flexibility to manufacturers. For school buses and trucks, manufacturers could meet the Omnibus Low-NOx regulation adopted in 2020 or the previous regulation that met the U.S. Environmental Protection Agency levels set in 2010. The CRA this spring revoked three waivers, one of which allowed CARB to set a new level of 0.05 g/bhp-hr of NOx.

The public had five business days from Monday’s announcement to weigh in on CARB’s intent to enact its Emergency Vehicle Emissions Regulations by filing comments with the state’s Office of Administrative Law.

The emergency regulations do not address the Advanced Clean Trucks rule, which the CRA also revoked an EPA waiver for.

“The amendments would confirm that, until a court resolves the uncertainty created by the federal government’s actions, certain antecedent regulations (displaced by Advanced Clean Cars II and Omnibus) remain operative (as previously adopted) with the caveat that CARB may enforce Advanced Clean Cars II and Omnibus, to the extent permitted by law, in the event a court of law holds invalid the resolution purporting to disapprove those waivers,” the proposal reads.

In other words, manufacturers would be able to continue certifying engines under either the earlier-adopted emissions standards or the more stringent standards.

CARB noted that most engine and vehicle manufacturers have already planned on or achieved compliance with the more stringent emissions requirements. But CARB also warned that manufacturers choosing to certify to previous emissions levels assume the risk of having engines out of compliance with regulations, should current legal cases brought against the Trump administration go in California’s favor.

Cummins spokeswoman Drew Blair told School Transportation News that it was premature to respond in detail to CARB’s proposal, as it was not final. But she added Cummins is following the issue closely.

“Cummins is focused on delivering products with the power and performance our customers need to get their jobs done, while also meeting emissions requirements,” she commented. “We also will continue to advocate for national standards to bring clarity to our business and customers and ensure efficient and affordable products are available to power their needs.”

Earlier this month, a group of vehicle manufacturers led by Daimler Truck North America, the parent company to Thomas Built Buses, filed a suit against CARB, claiming the agency would need to re-enact previous legislation before it could enforce earlier emissions regulations.

“In the event the vehicle manufacturer’s claims were deemed correct … then CARB must take immediate action to maintain a stable vehicle market in the state and prevent the sale of vehicles into the state that would not be certified to either set of standards …,” CARB writes. “… Otherwise, in light of these unprecedented circumstances, there may remain questions — for the first time since CARB’s program began decades ago — as to whether any California standard is in effect.”

A Daimler Truck spokesperson said Wednesday the company could not comment on CARB’s proposal.

International, the parent to IC Bus, signed onto the Daimler Truck lawsuit. An International spokesman declined comment because the litigation is ongoing.

Meanwhile, CARB said Tuesday 23 percent of new medium- and heavy-duty vehicle sales in 2024 were zero emissions, more than double the minimum statewide requirement. The data is based on 30,026 zero-emission trucks, buses and vans reported to CARB by manufacturers. School buses are included in the reporting.

It was the fourth year in a row that ZEV sales increased. More than 57,000 ZEVs have been sold in California since 2021.

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Related: California Doubles Down on Zero-Emission Vehicles with Renewed Affordability, Adoption Priorities
Related: Despite Federal Funding in Peril, California State Funding for EVs Continues
Related: CARB Uses $33M in Funding to Target Other Zero-Emissions School Travel
Related: NASDPTS Revises Illegal School Bus Passing Count After California Fixes Error
Related: California School Bus Driver Teaches Lessons of Compassion Through Music

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SAN ANTONIO, Texas- HOLT Truck Centers, an operating company of HOLT Group, donated five heavy-duty trucks to promote diesel technician training at three schools in Oklahoma, highlighting their commitment to education, workforce development, and the future of the skilled trades industry.

The donation includes two trucks each to Francis Tuttle Technology Center and Oklahoma State University Institute of Technology, and one truck to Tulsa Tech. Each truck weighs more than 50,000 pounds and is equipped with advanced systems that aim to help students bridge the gap between theory and practice.

“We are proud to support programs that are shaping the future of our skilled trades workforce,” said Robert Fulgium, senior vice president of HOLT Truck Centers. “At HOLT Truck Centers, we recognize the critical importance of providing students with access to industry-standard equipment, ensuring they graduate job-ready and confident in their abilities. Training on the latest tools and technologies will give students a competitive edge as they transition into the workforce.”

The donation comes at an important time, as industry experts forecast a growing technician shortage due to retiring baby boomers and an increasing demand for skilled trade professionals. According to TechForce Foundation’s 2024 Technician Supply and Demand Report, the United States will need more than 249,000 new techs by 2028 to meet demand.

This growing gap threatens productivity and service reliability. HOLT Truck Centers’ donation aims to address this issue by providing schools with the tools to train more students and strengthen the workforce pipeline.

The trucks will be used across several training programs to enhance hands-on learning in the diesel industry. They will combine classroom instruction with evolving technologies like hybrid and electric systems, help meet rising student interest, and provide practical experience for students training to become diesel technicians.

HOLT Truck Centers’ donation reflects their goal to support students and empower entire communities by helping close the talent gap in skilled trades.

About HOLT Truck Centers:
HOLT Truck Centers is the authorized International and Idealease dealer in Oklahoma, North Texas, and East Texas. Additionally, HOLT Truck Centers has dedicated truck engine service bays throughout its full-service facilities, with the necessary components to provide bumper-to-bumper diagnostics, maintenance, and emergency service, including brakes, drivelines and transmissions for all makes and models of on-highway trucks, RVs, and buses.

With a large selection of new and used on highway trucks, trailers and specialty equipment, HOLT Truck Centers has the inventory to meet your needs. Other manufacturers available at HOLT Truck Centers include IC Bus, Isuzu commercial trucks, XL Specialized, Crane Carrier, Load King, and Hi-Vac specialty vehicles. HOLT Truck Centers has 36 locations throughout Texas and Oklahoma.For more information, visit HoltTruckCenters.com.

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LISLE, Ill. – Durham School Services and its sister brands have partnered with Universal Technical Institute (UTI) to help develop and recruit the next generation of skilled diesel technician team members. Through this collaboration, Durham will join UTI’s Tuition Reimbursement Program (TRIP), which helps employers attract and retain top talent. As part of the partnership, Durham is offering a $3,000 relocation bonus to all UTI Diesel Technology graduates who accept employment and relocate for a position.

As a participating TRIP employer, Durham and its sister brands will be able to showcase their career opportunities through UTI’s career pages, job boards, print collateral, digital campaigns, and on-campus job fairs – linking students with a potential post-graduation employer that is ready to hire skilled transportation technicians.

Melanie Scheet, Senior Vice President of Student Success and Outcomes at UTI, noted, “Our industry partnerships underscore the high demand for skilled technicians and the value of a UTI education, which produces graduates who are workforce-ready. We look forward to working with Durham School Services to connect our students and alumni with fulfilling career opportunities at their company.”

“We are thrilled to announce our partnership with UTI to hire diesel technicians nationwide,” said Yvonne Valdes, Senior Director of Talent Acquisition, Durham School Services. “This collaboration represents our commitment to innovation and excellence in the transportation industry. By offering relocation assistance, we aim to attract top talent and give them the support they need to thrive. Together with UTI, we look forward to building a stronger workforce and continuing to deliver exceptional service to our customers.”

About Durham School Services: As an industry-leading student transportation provider, Durham School Services and its sister brands, Stock Transportation and Petermann Bus, are dedicated to the safety of our students and People. Collectively, for more than 100 years, we have been committed to Excellence and upholding our mission of getting students to school safely, on time, and ready to learn. Through this mission and a grassroots approach to our operations, Durham School Services and its sister brands have earned recognition as a trusted transportation provider among our Customers and the Communities they serve.

About Universal Technical Institute, Inc.
Universal Technical Institute, Inc. was founded in 1965 and is a leading workforce solutions provider serving students, partners and communities nationwide. The company offers high-quality education and support services for in-demand careers via its two divisions: UTI and Concorde Career Colleges. The UTI division operates 15 campuses located in nine states and offers a wide range of transportation, skilled trades, electrical and energy training programs. Concorde operates across 17 campuses in eight states and online, offering programs in the allied health, dental, nursing, patient care and diagnostic fields. For more information, visit www.uti.edu or www.concorde.edu; LinkedIn at @UniversalTechnicalInstitute and @Concorde Career Colleges; or X at @news_UTI and @ConcordeCareer.

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New research published by the World Resources Institute (WRI) and Carleton University finds that the U.S. could see an estimated $1.6 billion in societal benefits every year by using electric school buses.

This first-of-its-kind data released Wednesday accounts for the cost of using diesel-burning school buses as compared to using electric school buses, measured by two metrics: Health impacts and climate effects. WRI stated that by “comparing these costs at the local level, the data provides annual societal benefit figures in dollar terms for every county in the contiguous U.S.”

People in every state would experience positive benefits from ESBs, the research suggests, but it would be most pronounced in countries operating the oldest-burning school buses, and in communities with higher proportions of people of color and in countries with larger populations and dense, urban areas.

Still, the research indicates New York, California, Florida and Texas are poised to benefit the most from ESBs. However, nearly every county nationwide stands to benefit by using electric school buses, with the study finding more than $509,000 in average annual benefits per county and some counties seeing more than $30 million in societal benefits each year. Annual benefits vary by county based on school bus fleet size, population density, electricity fuel type mix, and age of the current diesel fleet.

“For years, communities in New York have experienced outsized impacts of diesel pollution,” commented Matt Berlin, CEO of New York City School Bus Umbrella Services. “As this new data from WRI proves, school bus electrification makes sense for New Yorkers. Investing in electric school buses means making the bus ride for kids and bus attendants and drivers on the bus quieter and healthier. Beyond the bus itself, reducing pollution near schools and in the communities where we all live means we all enjoy these benefits.”

WRI stated that the research is among the first to “model and quantify the county-level health and climate impacts of using electric school buses instead of aging diesel-burning school buses.”

When looking at the the factors of population health and climate change, the research notes that about 90 percent of the nearly half-million school buses operating in the U.S. run on diesel fuel and the harmful pollutants in diesel can cause respiratory illness, cognitive impairment and cancer, as recognized by the World Health Organization.

ESBs, however, produce zero tailpipe emissions and have the lowest greenhouse gas footprint of any school bus type at the national level, even when accounting for emissions from the associated electricity generation, the research claims. It examines the effects of diesel-burning school buses in operation, as well as the production and distribution of the fuel used.

The health impacts of diesel-burning school buses were estimated by determining the excess mortality associated with exposure to PM2.5, despite federal regulations over the past 15 years that have reduced diesel emissions by approximately 90 percent. The impacts were calculated into dollar figures based on a sociological metric that reportedly looks at how much society is willing to pay for small reductions to the risk of dying from health conditions that may be caused by environmental pollution. The sociological metric is referred to as the Value of a Statistical Life.

Meanwhile, the climate impacts of diesel-burning school buses were measured by calculating the Social Cost of Carbon, an established metric for the societal damage from extreme heat, sea level rise, food insecurity and other impacts of climate change, from these buses’ carbon dioxide emissions. The study notes that because health impacts were measured only by excess mortality from PM2.5, there are likely more health benefits of electric school buses that aren’t captured in this data, including reduced exposure to ozone pollutants, nitrogen dioxide, nitrogen oxide (NOx) and volatile organic compounds, or VOCs.

Further Studies Needed

 

A technical note acknowledges several research limitations in addition to only studying excess mortality of PM2.5 and recommends additional environmental analysis and higher resolution modeling in urban areas. The study does not address environmental justice or equity benefits of ESBs and disparities in air pollution based on race, ethnicity or income, the latter which the researchers said could reveal additional ESB benefits for marginalized communities. The research also makes assumptions about brake and tire-wear emissions and relies on “not yet mature” ESB operational parameters and emissions based on data from 2020 that does not account for changes in fleet composition changes, vehicle standards and the electricity grid. Additionally, benefits per ton remain consistent between 2016 and 2020 and “may not fully capture changes in atmospheric composition or emissions.”

Once the costs of diesel school bus impacts were determined, the research calculated the same types of impacts for ESBs, including electricity generation, and compared them to that of diesel to provide a dollar figure from each county.

Brian Zepka, research manager for WRI’s Electric School Bus Initiative said the research used a new modeling approach to trace air pollution back to its source, “allowing us to directly attribute which health impacts stem from diesel-burning school buses. While other approaches start with the air pollution source and estimate its impact, this approach, developed in peer-reviewed research funded by the Health Effects Institute, starts with the health impacts, like early deaths from air pollution, and traces that pollution back to its source—in this case, school buses.”
WRI noted the research “uses state-of-the-art models and county-level data to more specifically estimate where electric school buses would provide the most health and climate benefits through reduced emissions. It doesn’t look at the cost to own or operate different types of school buses, instead examining the impact on society from the use of the buses.”

Sue Gander, director of WRI’s Electric School Bus Initiative, said the new research shows “undeniably” that ESBs give kids a cleaner ride to school.

“In every region of the country, North, South, East and West, communities stand to see real, significant benefits from the cleaner air and reduced emissions of electric school buses. And as this research demonstrates, everybody wins when kids get to school on a clean ride, to the tune of $1.6 billion dollars every year in health and climate benefits nationwide,” she said. “Given the outsize benefits of electrifying the most polluting diesel-burning school bus fleets, and the concentration of those buses in low income areas and areas with more people of color, this data reinforces the need to ensure that those most impacted by diesel exhaust pollution are among the first to benefit from electric school buses.”

The 10 percent of diesel-burning school buses that are the most polluting are responsible for nearly 50 percent of the total health impacts of diesel-burning school buses nationwide, the research notes. Breaking that down by per-mile health impacts from diesel school buses, while varying, results to under $10 to nearly $4,000 per 1,000 miles driven, depending on the school bus age and operating location.

While the research only focused on PM2.5-related premature mortality as the primary health end point, diesel-burning school buses also emit large amounts of NOx, which contribute to ozone formation and nitrogen dioxide (NO2) exposure—both are linked to asthma, morbidity and additional premature deaths.

The research does not include the additional health effects or impacts of other diesel pollutants. WRI stated the research is likely underestimating the total benefits of electrification. Incorporating NOx-related outcomes in the future could show greater contrasts between diesel and electric.

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Related: California Doubles Down on Zero-Emission Vehicles with Renewed Affordability, Adoption Priorities
Related: Safety Concerns of the Electric Grid?
Related: Report Highlights Shift in Federal Policy from EVs to Conventional Fuels

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Over the past few years there has been a growing number of trucks with fully electric, plug-in hybrid, or mild-hybrid powertrains, but some believe that the good-old diesel remains the best fit for the job. The Australian arm of Mazda declares loyalty to diesel trucks, despite theoretically having access to an EV powertrain for the BT-50.

The Mazda BT-50 is a midsize truck which is twined with the Isuzu D-Max. The latter has recently expanded its lineup with a fully electric version. The D-Max EV has an output of 188 hp (140 kW / 190 PS) from dual electric motors and a WLTP range of 263 km (163 miles) from a 66.9 kWh battery pack. However, it starting price is significantly higher than the equivalent diesel.

More: New Electric Isuzu Pickup Comes With A Shocking Price Tag

Our colleagues from Drive.com.au spoke to Vinesh Bhindi, Managing Director of Mazda Australia, asking him about a potential BT-50 EV. Bhindi replied that Mazda is not ready to make any announcements at this stage, and he added:

“I don’t think we will be having a battery EV ute anytime soon. But we will let the market tell us that there is room for it, and there is demand for it, and Mazda should consider what the options are.”

The Ford Ranger, BYD Shark, and GMW Cannon Alpha have already brought plug-in hybrid tech in the midsize truck segment, while the upcoming Nissan Navara and the next Mitsubishi Triton are expected to follow the same road. Still, the boss of Mazda Australia doesn’t believe that PHEVs are a threat:

“Diesel in utes is here to stay, I don’t see a future where plug-in hybrids or battery EV utes are the only options, I think diesel still makes sense. And when you look at the NVES (New Vehicle Efficiency Standard), diesel technology still has better CO2 output compared to the others.”

More: 2025 Mazda BT-50 Facelift Brings Sporty New Face And Bigger Screens

These comments make it clear that the Mazda BT-50 won’t be getting a zero-emission option – at least in the foreseeable future. Still, we can’t entirely rule out a smaller dose of electrification, following the example of the Toyota Hilux which recently got a mild-hybrid diesel. After all, this doesn’t sacrifice any of the advantages of the diesel (high low-end torque, reliability, cargo-carrying and towing capabilities etc) while helping lower fuel consumption and emissions.

The third generation of the BT-50 was introduced in 202 and received a facelift in 2024. Currently, it is available in Australia with two turbodiesel powertrains. The base 2.2-liter four-cylinder produces 161 hp (120 kW / 163 PS) and 400 Nm (295 lb-ft) of torque, while the larger 3.0-liter is good for 187 hp (140 kW / 190 PS) and 450 Nm (332 lb-ft).

Engine manufacturers using selective catalytic reduction (SCR) emission control technology have new federal guidance allowing them to more gradually “derate” systems when diesel exhaust fluid (DEF) depletes.

U.S. Environmental Protection Agency (EPA) Administrator Lee Zeldin announced during the Iowa State Fair last week the new action designed to protect American farmers, truckers and other diesel equipment operators from sudden speed and power losses caused by DEF systems.

“We have heard loud and clear from small businesses across the U.S. that the current DEF system is unacceptable,” Zeldin said in a statement. “It is unacceptable that farmers, truckers, construction workers, and many other small businesses continually experience failures of diesel-powered equipment when they need it most—costing millions of dollars in lost productivity. Today, we are responding to those concerns by calling on manufacturers to take action to update their software and eliminate the unnecessary sudden loss of power and frustrating shutdowns that too many Americans have experienced.”

EPA issued the guidance urging diesel engine and off-road farm equipment manufacturers to revise DEF system software in existing vehicles and equipment to prevent these sudden shutdowns. Starting with model year 2027, all new diesel on-road trucks and motorcoaches must be engineered to avoid sudden and severe power loss after running out of DEF.

EPA said it also has a fix for derate issues in legacy diesel vehicles with SCR.

“To fix the problem for vehicles already in use, EPA’s new guidance, developed in collaboration with manufacturers, will work to ensure that the necessary software changes can be made on the existing fleet,” the press release notes. “In addition to providing certainty to manufacturers about how EPA wants this issue resolved, the agency is not requiring separate approvals beyond that provided in EPA’s guidance. This ensures that bureaucratic steps do not delay manufacturers’ ability to put solutions into the field.”

Since 2010, SCR has used on-board diagnostics sensors to detect when DEF runs out or diesel particulate filters clog and then initiate a rapid derate of the engine. Within four hours of DEF depletion, vehicles automatically slow to five miles per hour.

But the results for industries have been “catastrophic,” said EPA, as disruptions have occurred to logistics, agriculture and construction. Several diesel engine manufacturers also initiated recalls over their SCR technology. Cummins recalled 2010 to 2015 medium- and heavy-duty engines, including the ISB 6.7 for school buses, because the SCR unit catalysts degraded faster than expected.

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Related: Trump’s EPA Eases Derate Rules, Boosting Bus Passenger Safety
Related: Idaho Department of Education Names School Bus Technician of the Year
Related: (STN Podcast E268) Learning Curve: EPA Surprise, Young Michigan Asst. TD Talks Leadership
Related: EPA Proposal Seeks to Eliminate GHG Regulations for Vehicles, Engines
Related: EPA Provides Update on Clean School Bus Program

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“At Cummins, we recognize our responsibility in powering some of the country’s most economically vital applications, from the buses that take our kids to and from school to the trucks that deliver critical goods,” a statement from the company reads. “Collaboration with our customers is at the heart of what we do, ensuring we deliver solutions that meet their business needs while continuously innovating to improve fuel efficiency, reduce costs and enhance reliability. SCR is a widely accepted, proven technology utilized in many applications, and we are committed to working closely with the EPA and the select customers affected by SCR inducements. Together, we aim to provide regulatory certainty, greater flexibility and the dependable solutions that contribute to the American economy.”

Daimler Truck North America told School Transportation News it welcomes the new guidance.

“We are supportive of the efforts to provide more flexibility with regard to DEF inducement and are actively working on solutions to support our customers,” the statement reads.

The Engine Technology Forum and several other organizations also support the new derate guidance.

“EPA has heard from users of diesel trucks, tractors and equipment and, working with manufacturers, has responded with these adjustments to improve operational performance while ensuring emissions integrity,” Executive Director Allen Schaeffer said. “EPA’s announcement [Aug. 12] provides new guidance that allows manufacturers to adjust these systems to ensure that farmers, motor coach operators, and truckers, who all rely on diesel engines and equipment, will be able to complete critical work with sufficient lead time for scheduling maintenance and repairs.”

The post Engine, Truck Manufacturers Support EPA Easing Derate of SCR Diesel Emissions Controls appeared first on School Transportation News.

More EPA regulatory changes in the truck and bus market prompt continuing clean fuel conversations. Also, learn more about the crucial training at the upcoming Transporting Students with Disabilities & Special Needs Conference and Trade Show.

Kara Sands, transportation lead trainer and driver at Hanover Community Schools Corporation in Indiana, was selected to receive the inaugural Dick Fischer School Bus Safety Scholarship for STN EXPO West this year. She discusses ways to promote safe school bus operations and her takeaways from STN EXPO.

Read more about safety.

This episode is brought to you by Transfinder.

 

Message from IC Bus.

 

 

Stream, subscribe and download the School Transportation Nation podcast on Apple Podcasts, Deezer, Google Podcasts, iHeartRadio, RadioPublic, Spotify, Stitcher and YouTube.

The post (STN Podcast E270) Not Just a Job: Hear From Dick Fischer School Bus Safety Scholarship Award Winner appeared first on School Transportation News.

The Environmental Protection Agency on Tuesday announced sweeping changes to rules governing diesel exhaust fluid (DEF) systems, aimed at preventing sudden power losses that have long frustrated farmers, truckers and bus operators.

The Trump administration says the guidance, which takes effect immediately, will ease operational disruptions and reduce safety risks while maintaining emissions standards.

EPA Administrator Lee Zeldin unveiled the changes during a press call from the Iowa State Fair alongside Small Business Administrator Kelly Loeffler, Agriculture Secretary Brooke Rollins and Sen. Joni Ernst, R-Iowa.

“The United Motorcoach Association applauds the new guidance from the Environmental Protection Agency (EPA) under the leadership of Administrator Lee Zeldin regarding Diesel Exhaust Fluid regulations for motorcoaches,” remarked UMA’s President and CEO Scott Michael. “EPA’s new guidance will improve safety, avoid passengers stranded on the side of the road, and unnecessary towing costs while maintaining the goal of safeguarding the environment.”

The policy allows manufacturers to reprogram existing vehicles to avoid abrupt “derates” — a rapid reduction in engine power — that can cut a vehicle’s speed to as little as 5 mph within hours of a DEF system fault.

“This is yet another common-sense policy,” Zeldin said. “We can protect the environment and grow the economy at the same time.”

Under current rules, a sensor failure in a DEF system can trigger severe speed limits within four hours, sometimes leaving vehicles stranded mid-operation. Zeldin said the new guidance will extend that timeline significantly.

‘Massive Deregulation’

Loeffler said the new policy will save America’s 1.8 million family farms an estimated $727 million annually.

“This is massive deregulation,” she said. “It’s solving a huge, long-standing issue that has gone on for 15 years.”

Rollins called the announcement “a big deal” for producers already struggling with higher costs and frequent downtime.

“We’re doing God’s work,” she said. “This is how we return power to the people and get the strangulation of overregulation out of everyday mom-and-pop small business owners’ lives, especially our farmers.”

While much of the call centered on agriculture and freight, Zeldin emphasized the rule’s importance for the passenger transportation industry.

“This was one of the concerns we heard from bus operators,” Zeldin told Bus & Motorcoach News. “It’s a safety concern when a bus is forced to park unexpectedly on the side of the road for an extended period of time. That’s all a product of poor government policy that didn’t think through the consequences.”

Phil Streif, of Vandalia Bus Lines in Caseyville, Illinois, told Bus & Motorcoach News in a separate interview that the change is the result of years of advocacy to bring operators’ perspectives to federal regulators. Streif began contacting the EPA five years ago, warning that the four-hour repair window was “just not realistic” for the motorcoach industry.

“After countless meetings with EPA and CARB, we finally got relief,” Streif said, “but the question remained about existing fleets.”

That question led to additional negotiations — and resistance from some engine manufacturers — before regulators agreed to modify the rules for vehicles already in service.

Uncertainty over future federal regulations already has disrupted one engine maker’s plans. Cummins Inc., a manufacturer of diesel engines, announced this month the postponement of the launch of its new X15 diesel engine for heavy-duty trucks to late 2026.

Initially unveiled in February with features meeting 2027 EPA and CARB standards, the engine was set for pre-orders in mid-2025 and deliveries in 2026. A statement from Cummins touted the technology used in the X15.

“Selective Catalytic Reduction (SCR) is a widely accepted, proven technology utilized in many applications, and we are committed to working closely with the EPA and the select customers affected by SCR inducements. Together, we aim to provide regulatory certainty, greater flexibility, and the dependable solutions that contribute to the American economy.”

Ending a Safety Risk

Streif said two moments proved decisive in resolving the derating issue: meeting EPA’s Amy Kopin, “who strongly advocated for us,” and the change in agency leadership when Zeldin took over. “They came out early, promising a goal to reduce regulation and the red tape that makes our businesses more challenging to operate. After many exchanges, we made great progress, and now we’re finally at the finish line.”

The new rules give bus operators 40 hours before even a minor torque reduction — something Streif calls “a game changer.”

“There are so many things that run through your head when you see an inducement code and know you have four hours before the bus is essentially inoperable,” he said. “We’re moving the most precious cargo there is — people — and derating created a profound safety risk for our drivers and passengers.”

Streif recounted an incident just two weeks ago in which a bus in New Orleans began showing a DEF-related fault code. Mechanics attempted repairs, but the problem reappeared within hours, forcing the company to dispatch a replacement bus from Alabama to ensure passengers could return home on time.

“Something that could have waited until we got the bus back created an obstacle for us that we had limited options for,” he said.

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Related: Cummins Details Coming B7.2 Diesel, Gasoline Engines for School Bus Market
Related: School Districts Replace Diesel Buses with Propane, Electric
Related: Oregon School District Maintenance Internship Program Yields Success

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The industry’s challenge was compounded by the scarcity of repair shops for motorcoaches, especially in remote areas or during off-hours. “There were no signs that could predict when a sensor would go bad, so it was like rolling the dice every time a bus went out,” Streif said.

Streif credited the American Bus Association, United Motorcoach Association, and International Motorcoach Group with helping build the case for reform.

“With their help and many members’ feedback, we were able to collect hard data and surveys that provided factual statistics on the impact derates have,” he said. “Honestly, without the strength of these great organizations, we probably wouldn’t have the results we were able to achieve.”

Putting Focus on Bus Industry

The advocacy also exposed a gap in federal oversight. “When I initially reached out to the EPA, their response was, ‘Oh, we didn’t even consider buses,’” Streif said. “It’s been stated before that our industry has been left out in the past, but I think that’s going to change going forward.”

He said the industry will need to maintain its presence in regulatory discussions. “Although our industry is small, we all work together in a way that other industries don’t see. That’s what will make us successful as long as we continue to support one another.”

Ernst praised the EPA’s move, calling the previous guidelines “arbitrary” and harmful to productivity. She also tied the changes to broader Republican efforts to roll back regulations enacted during the Biden administration.

Zeldin said the change reflects a broader philosophy of governance.

“Today’s guidance bridges the gap between now and 2027, ensuring existing vehicles on the road and in the field are just as dependable,” he said. “We’re both protecting human health and the environment and the people who depend on diesel engines to do their job.”

The EPA said no additional agency approval will be required for manufacturers to implement the new software changes.

For Streif, the new timeline — 40 hours before a small torque derate, then 200 hours before a 50 mph limit — is one the industry can live with. “On flat stretches we won’t see any impact,” he said. “I think we can all live with that.”

This article is reprinted with the permission of Bus and Motorcoach News. Read the original post here.

The post Trump’s EPA Eases Derate Rules, Boosting Bus Passenger Safety appeared first on School Transportation News.

While the immediate future remains uncertain on federal emissions regulations and funding, school bus OEMs say they are prepared with varied solutions going forward to meet the needs of every customer, no matter the fuel or where they operate.

That was the key takeaway from a July 13 panel at STN EXPO West in Reno, Nevada. The OEM representatives on stage were Francisco Lagunas, general manager of North America Bus for Cummins; Jim Crowcroft, general sales manager for Thomas Built Buses; Katie Stok, product marketing and commercial readiness for IC Bus; Frank Girardot, the PR, marketing and government relations leader at RIDE; and Brad Beauchamp, EV product segment leader for Blue Bird. The session attempted to provide some clarity to the ever-changing funding and fuel landscape.

“The only certainty is that everything is so uncertain,” Lagunas punctuated during the “The Engines & Emissions Pathway Forward” session, facilitated by School Transportation News Editor-in-Chief Ryan Gray.

Lagunas added that Cummins is seeing an increased demand in diesel, confirming that the new B6.7 octane engine will be available in January. Though, he noted that investments in electric batteries and drive systems have not slowed down. Accelera, the zero-emissions division of Cummins, is a member of a joint venture with Daimler Truck North America and Paccar to create a U.S.-based battery cell manufacturer, Amplify Cell Technologies.

Crowcroft agreed, adding that one year has made a huge difference in industry focus. Several of the same panelists sat on a similar panel last year at STN EXPO, where he said EV was the focus of the industry.

“Now, it’s been a complete 180 [degree turn] this year,” he shared, adding that the industry has spent too much time talking about EVs and not enough time talking about the other offerings.

This year has been about being diverse, being nimble and ready to adapt to change when necessary. “What is the most practical plan?” he asked, noting that diesel technology has advanced and EV fatigue is setting in.

He shared that Thomas is not telling customers what fuel or energy type to use but instead empowering them to choose what works best for their fleets. Noting the Trump administration’s relaxation of a federal push for zero-emission vehicles, Crowcroft said there has been a sigh of relief from customers for not feeling like they have to purchase electric school buses.

He noted that with all the changes and technologies, it puts more pressure on the OEMs to keep up. He said Thomas is committed to investing in quality, citing that ahead of the 2027 GHG Phase 3 regulations targeting lower NOx (the EPA currently has it on hold pending a proposal to remove GHG regulations), school districts might want to pre-buy within the next 12 months to avoid cost increases tied to the new technology.

Beauchamp said Blue Bird has always focused on a fuel-agnostic path for its customers, and the company plans on continuing with propane being a low emission source. While he said Blue Bird had yet to see EV order cancellations as of last month, he anticipates those orders will flatten. Regardless, Blue Bird is committed to EV, noting an $80 million grant from the U.S. Department of Energy last year (and double that amount in company matching funds) to build a new Type D electric school bus plant.

He noted that while the supply chain has improved coming out of COVID-19, “We’re not out of the words on it, yet,” he said.

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Related: Electric School Bus Manufacturing Included in Nearly $2B Federal Energy Grant

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Stok noted that the industry conversation should not be about low costs but having a supplier that delivers good quality on time. She noted that, like the other OEMs, EV is still very much part of the IC Bus product portfolio, as is diesel. However, she said the change in federal regulations will usher in changing order preferences across the industry, noting that IC is reintroducing its own gasoline school bus with the upcoming Cummins engine.

For the remainder of 2025, she said IC Bus is on track to have the highest production output from its Tulsa, Oklahoma plant. Communication is key right now, she added, and the manufacturer is working with its dealer network to listen to the customers and continue to improve.

Meanwhile, Girardot said it’s too early to predict what the future holds but BYD electric school bus company RIDE believes it holds a promise to furthering the deployment of EVs and enhancing the capabilities of vehicle to grid technology. He noted that V2G holds value and is something that communities need to consider. He highlighted success stories of V2G, such as in the Oakland Unified School District in California.

Girardot added that technician training on electric school buses is a must.

Additionally, RIDE announced a range extension on its blade battery, which took home the Best Green Technology, as judged by attendees at the STN EXPO West Trade Show Innovation Awards. Girardot added RIDE, too, received a competitive grant to expand its manufacturing facility.

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Related: Transfinder, RIDE Win Big with STN EXPO Innovation Awards
Related: Another $200M Now Available for Electric School Buses in New York
Related: EPA Provides Update on Clean School Bus Program

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The post Merging Net Zero With Zero Waste: One solution to biofuel feedstock shortage appeared first on Alternative Energy HQ.