SchoolBus logo in red and orange
MenuMENU
SearchSEARCH

School bus fleets may get more time to meet clean air rule

Amendments to the school bus provisions of the California Air Resources Board's Truck and Bus Regulation that the agency is considering include adding an optional two-year deferral for public fleets to comply. A public meeting to discuss the changes will be held on July 28 in Sacramento.

July 22, 2010
School bus fleets may get more time to meet clean air rule

California pupil transportation operations may get more time to comply with the requirements of the Air Resources Board’s Truck and Bus Regulation, which was drafted to reduce emissions generated by diesel-powered buses, like these operated by Kings Canyon Unified School District. The agency has proposed changes to the regulation’s school bus provisions.

3 min to read


SACRAMENTO, Calif. — The California Air Resources Board (CARB) will hold a public meeting on Wednesday, July 28, to discuss proposed changes to the school bus provisions of its Truck and Bus Regulation.

SBF reported on the regulation and how it will impact the school bus industry last month.

The regulation was drafted to reduce diesel-powered bus and truck emissions, and one of the requirements was that all diesel-fueled school buses must be retrofitted with the highest level Verified Diesel Emission Control System available by Jan. 1, 2014. (To read about all of the school bus provisions, click here.)

The aforementioned requirement was concerning to John Clements, director of transportation at Kings Canyon Unified School District in Reedley, Calif. Clements runs eight Crown Coach school buses equipped with large-block Cummins engines. Diesel particulate filter (DPF) manufacturers and installers have told him that if he retrofitted his Crown buses with DPFs, the buses would not make it through a day of service without plugging up with particulates.

Ad Loading...

“This is a serious safety concern for me as a director of transportation if students are stranded on a mountain or valley roadway,” Clements said in June.

Changes to the school bus provisions that the CARB staff are considering include:   

• Adding an optional two-year deferral for public fleets to comply.
• Allowing school buses owned and operated by a sectarian or denominational school not under the exclusive control of the offices of the public schools to comply in 2015-18 instead of in 2013-14.
• Reducing the reporting requirements for a school bus fleet.

Mary Fricke, public information officer for the CARB, told SBF that the agency recognizes the economic impacts to the state whenever a regulation is adopted.

"With the recent economic downturn, the staff was directed to look for opportunities to provide some regulatory relief while still meeting the required emission reductions and continuing to safeguard health benefits,” she said. “The proposed revisions to the school bus portion of the regulation were designed to provide relief without increasing the complexity of the regulation."

The changes to the school bus provisions are scheduled to be proposed to the CARB board at a meeting on Sept. 23 and 24. The public meeting on July 28 to discuss the changes will be held from 10 a.m. to 12 p.m. in conference room 720 at the Cal/EPA Headquarters Building in Sacramento.

Clements told SBF on Thursday that he plans to attend the public meeting. “I am hopeful this may buy us some time until we can obtain another school bus replacement grant funding source,” he said.

Those unable to attend the meeting in person can participate via conference call at (866) 917-4579. The participant passcode is 7167787.

Contact Janet Page, air pollution specialist, at (916) 324-1988 or jpage@arb.ca.gov with questions.

More Safety

Fatal School Bus Accident in New York graphic dated Jan. 29, 2026, showing a close-up of a yellow school bus with cracked-glass overlay and School Bus Fleet logo.
Safetyby StaffFebruary 3, 2026

New York 5-Year-Old Killed by School Bus, Investigation Ongoing

A Rockland County child was struck by their school bus late last week. Here's what we know so far about this and other fatalities and injuries in the area over the years.

Read More →
A red, orange and yellow graphic with anti-pinch door sensor products and text reading "Maine's New Mandate: Anti-Pinch-Sensors & Bus Safety."
Safetyby Elora HaynesJanuary 29, 2026

Prevent School Bus Dragging Incidents: Anti-Pinch Door Sensors and Maine’s New Mandate

As Maine becomes one of the first states to require anti-pinch door sensors on new school buses, manufacturers like Mayser offer a look at how the technology works and why it's a critical fail-safe.

Read More →
SponsoredJanuary 29, 2026

8 Ways To Simplify and Streamline School Bus Fleet Operations

What if your fleet technology actually worked together? Learn eight practical strategies to integrate multiple systems into one platform, unlocking clearer insights, stronger safety standards, and smoother daily operations.

Read More →
Ad Loading...
an illustration of a survey on a mobile phone with a hand on it, and the words Survey Says on it
Safetyby News/Media ReleaseJanuary 28, 2026

Survey: Most Parents Want Automated Enforcement on School Buses

A recent Verra Mobility survey reports that 82% of parents support safety cameras to penalize stop-arm violators and 70% favor automated enforcement in school zones.

Read More →
Image of an extended stop-arm with text reading "School Bus Safety: Funding Provides Bus Upgrades Across Ohio."
Safetyby StaffJanuary 27, 2026

State Grant Program Advances School Bus Safety Upgrades Across Ohio

$10 million in state grants will fund safety upgrades and new features on school buses serving students across the Buckeye State.

Read More →
A white Waymo vehicle waits at a crosswalk as a family crosses.
Safetyby StaffJanuary 26, 2026

Waymo Scrutiny Intensifies as NTSB Launches Investigation

After complications in multiple cities when self-driving taxis failed to stop for school buses, the NTSB joins NHTSA in a probe to determine what's behind the tech and related safety concerns.

Read More →
Ad Loading...
Transportant stop arm camera shown on an orange “new product” graphic with School Bus Fleet branding.
SafetyJanuary 20, 2026

Transportant Debuts First Full-Color Stop Arm Camera for School Buses

Transportant introduced a next-generation stop arm camera designed to improve image quality and reliability for documenting illegal school bus passings.

Read More →
SponsoredJanuary 19, 2026

3 New Ways Fleet Software Pays: ROI opportunities for modern fleet managers

Keeping buses safe, reliable, and on schedule requires more than manual processes. This eBook explores how modern fleet software supports school transportation teams with automated maintenance scheduling, smarter video safety tools, and integrated data systems. Discover practical ways fleets are reducing breakdowns, improving safety, and saving valuable staff time.

Read More →
An image of a student with a backpack walking with text reading "Walking School Bus: Grant Fuels Safer Pedestrian Routes to School in New Mexico."
Safetyby Elora HaynesJanuary 15, 2026

New Mexico District Receives $2.7M Grant to Expand Walking School Bus Programs

See how a federal grant will help Albuquerque Public Schools expand supervised walking routes and improve student safety.

Read More →
Ad Loading...
Illustration showing a school bus with a standard stop arm and a deployed retractable safety barrier extending across the roadway to block passing vehicles.
Safetyby News/Media ReleaseJanuary 13, 2026

Florida Inventor Creates Retractable 10-Foot Stop-Arm

A newly developed school bus safety device introduces a retractable barrier designed to deter illegal passing during student loading and unloading.

Read More →