U.S. Supreme Court Rules that South Coast Air Quality Management District Went too Far with Anti-Smog Rules
The United States Supreme Court ruled on April 28 that a Southern California air quality management district may have gone too far in imposing its own anti-smog rules for city buses, airport shuttles, and other vehicles.
The United States Supreme Court ruled on April 28 that a Southern California air quality management district may have gone too far in imposing its own anti-smog rules for city buses, airport shuttles, and other vehicles. Justices voted 8-1 on the case involving the South Coast Air Quality Management District. The nation's high court sided with oil companies and diesel engine manufacturers who claimed that local pollution rules conflict with national standards. The San Francisco-based Ninth U.S. Circuit Court of Appeals upheld the tougher local rules, but the decision was voided by the high court. The Supreme Court sent the case back to California to consider the issues. Supreme Court Justice Antonin Scalia, writing for the court, said that the emissions rules appear to be blocked by the federal Clean Air Act. “If one state or political subdivision may enact such rules, then so may any other; and the end result would undo Congress's carefully calibrated regulatory scheme,'' he wrote. Justice David H. Souter filed the only dissent. Souter, of New Hampshire, said he disagreed that the Clean Air Act “prohibits one of the most polluted regions in the United States from requiring private fleet operators to buy clean engines that are readily available on the commercial market.'' The rules apply to Los Angeles, San Bernardino, Riverside and Orange counties, which together have the nation's worst air-quality problem. The restrictions were imposed in 2000 and apply to fleets of vehicles such as buses, waste haulers and others. The Clean Air Act gives states some authority to set their own rules. At issue in the case were local standards.
More Operations

From AI Prompts to AI-Generated Safety Songs | AF News Recap
Can better prompts make AI more useful for fleet managers? This week, we’re breaking down smarter fleet analysis, an AI-assisted experiment that turned safety training into music, and what happened to fuel prices in August.
Read More →
How to Write Better AI Prompts for Fleet Analysis
Include these six elements in your fleet prompts to generate more relevant analysis and accurate answers.
Read More →
Fleet Meets: Eric Kilgore
This edition of the Fleet Meets series features one of the industry's best leaders driving multi-market and national operations.
Read More →
Why Reactive Fleet Management Is Becoming Too Expensive to Sustain
Research highlights a growing need for proactive management strategies to address rising costs in fleet operations effectively.
Read More →
What Your Fleet KPIs Aren’t Telling You
Tracking fleet metrics is only useful when the data leads to better decisions. This guide helps fleet leaders assess cost, utilization, and downtime more accurately, identify performance gaps, and prioritize the actions that can improve operational results.
Read More →
Hidden in Plain Sight: Fleet Compliance Risks
Fleet compliance isn't just about having policies — it's about consistently enforcing them. This practical guide reveals six hidden compliance risks common in public sector and shared fleet operations and outlines proven strategies to improve visibility, accountability, and audit readiness
Read More →
Turning Fleet Payment Data into Executive Insights
Does data alone drive results in operations?
Read More →
Automotive Fleet Opens 2026 Personal Use Survey for Commercial Fleet Managers
Commercial and corporate fleet managers are invited to share how their organizations handle company vehicle personal-use policies, charges, and driver eligibility.
Read More →
Gary Van Orden Retires After Nearly Four Decades in Commercial Fleet
From answering customer calls at Ford Motor Company to leading fleet sales across multiple OEMs and a fleet management company, Gary Van Orden's career reflects nearly four decades of leadership in commercial fleet.
Read More →
How Stellantis Plans to Get Ahead of Fleet Downtime
Vehicle acquisition may grab the headlines, but fleet uptime increasingly determines operating success. Darren Bradshaw of Mopar North America gives the details.
Read More →

