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California’s New Diesel Engine Rules Threaten Truck Capacity at L.A. Ports

CARB mandates 2010‑plus engines for drayage trucks, cutting the active fleet by a quarter and forcing owners to upgrade or sit out.

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Los Angeles, California — The California Air Resources Board (CARB) announced that, starting in 2025, all semi‑tractors and drayage trucks operating in the Los Angeles and Long Beach ports must be equipped with diesel engines from the 2010 model year or newer, a move aimed at tightening emissions ahead of a 2035 zero‑emission deadline.

The mandate arrives as the freight corridor around the West Coast grapples with a surge in container volumes and a chronic shortage of qualified drivers. Trucking firms rely on a mix of new and used diesel rigs to keep freight moving, and the new rule forces many operators to retire trucks that are still mechanically sound but fall short of the emissions threshold. For owner‑operators and small fleets, the cost of swapping a 2008 engine for a 2014‑spec powerplant can run into six figures, a hurdle that could push some out of the market entirely.

According to Harbor Trucking Association CEO Mark Schrap, roughly 23 % of cargo handled at the ports today runs on trucks with 2007‑2009 engines. Those units must be replaced by the end of this year to meet a 2014 model‑year minimum, trimming the active drayage fleet from about 5,000 rigs to an estimated 3,500‑3,600. Alvin Carter, an independent owner‑operator, warned that his 2009 diesel equipped with DEF (diesel exhaust fluid) is now barred from entering the terminals, despite meeting current FMCSA regulations. CARB also stipulated that all drayage trucks must transition to zero‑emission technology by 2024, with a hard stop on any diesel‑powered vehicle by 2035.

What This Means for Drivers

CDL‑A drivers who rely on short‑haul or drayage work will face a sudden drop in available shifts as carriers trim routes to match the reduced fleet. Owner‑operators must decide whether to invest in a compliant truck, lease a newer unit, or abandon port work altogether. Fleet managers will need to re‑budget for accelerated capital purchases, potentially diverting funds from other areas such as driver pay or safety programs. The rule also squeezes OTR truck driver jobs that feed into the ports, because fewer drayage trucks mean less need for long‑haul pickups and drop‑offs.

Industry Reaction

Port‑based carriers and independent haulers expressed frustration at the speed of the rollout. Schrap warned that the loss of a quarter of the drayage fleet could trigger container backlogs, longer dwell times, and higher freight rates. Some larger trucking companies hinted they will absorb the cost of new equipment to keep market share, while smaller outfits argue the rule creates an uneven playing field. Environmental groups praised the move, saying it aligns California’s climate goals with public health benefits, but they acknowledge the transition will be painful for the industry.

Key Points

  • CARB requires all drayage trucks in L.A. and Long Beach ports to have diesel engines from 2010 or newer by 2025.
  • Approximately 23 % of current cargo moves on trucks with 2007‑2009 engines, slated for removal by year‑end.
  • The active drayage fleet is projected to shrink from about 5,000 to roughly 3,500‑3,600 rigs.
  • Zero‑emission drayage trucks must begin appearing in 2024, with a full diesel ban by 2035.

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Photo by Erik Mclean on Pexels

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Tasha Bowman
Safety advocate and CDL instructor based in Tennessee. Tasha writes about roadside inspections, CVSA compliance, HOS violations, and the real-world gap between what the rulebook says and what happens at the scale house.