Idling increases fuel consumption and maintenance costs, impacting the operational efficiency of fleets
Efficiency in diesel truck fleet management is crucial in the world of transportation and logistics to maintain low costs and promote corporate sustainability. Truck idling, that is, the time they are running without moving, represents a significant factor in operating costs.
Idling can occur for various reasons, from traffic lights to extended use of climate control and appliances while the truck is stationary. This behavior increases fuel consumption and maintenance costs, negatively impacting operational efficiency and the company’s sustainability goals.

How does truck idling affect your business?
Regardless of the cause, truck idling is one of the least ideal aspects of freight transportation operations, as it involves significant fuel expenditure, component wear, and downtime. The main issues include:
Fuel consumption
According to the North American Council for Freight Efficiency, an idling engine notably increases fuel consumption, using approximately 1 gallon per hour. On average, a heavy-duty truck consumes 1 gallon of fuel per hour when idling, with an estimated cost of $4 per gallon of fuel, meaning the annual fuel expense for a fleet of 100 trucks would amount to $720,000.
Idling during rest periods in the United States alone consumes nearly one billion gallons of fuel per year, according to the Argonne National Laboratory, costing carriers and owners around $3 billion. The time and money spent on idling could be better used for relevant investments as well as transporting more cargo and generating higher revenues. In conclusion, carriers incur a significant opportunity cost for every minute of idling.

Engine wear and increased maintenance
According to the American Trucking Associations, idling can cause wear equivalent to between three and six hours of highway driving due to incomplete fuel combustion, resulting in carbon residue buildup. This affects engine performance and reduces its lifespan. Additionally, idling causes inadequate oil circulation, accelerating wear on internal engine components, increasing the need for costly and frequent maintenance. According to the National Research Council, the estimated cost is $0.15 per hour of maintenance for every hour of idling.
Environmental impacts
As mentioned earlier, idling leads to incomplete combustion, which can generate more harmful greenhouse gasses escaping into the atmosphere. According to the U.S. Department of Energy, the road transportation sector generates nearly 11 tons of carbon dioxide, 55,000 tons of nitrogen oxide, and 400 tons of particles. Minimizing idling time could reduce emissions by up to 16%.

Techniques to reduce idling time
Automatic shut-off
Automatic engine shut-off and start-up systems (AESS) in modern trucks, and retrofit versions in older models, manage idling through timers to prevent unnecessary prolongation. Their function is to maintain cabin temperature and battery charge, thereby reducing emissions, fuel consumption, and engine damage.
Auxiliary power units
Auxiliary power units (APUs) provide power to maintain climate control and electronic devices in trucks. Traditional ones run on fuel but are less efficient for small devices. Modern ones are more environmentally friendly, allowing connection to the public electrical grid.
Awareness programs
These programs educate drivers about the importance of environmental conservation and energy security. In addition to addressing the negative impacts of idling on the environment, health, safety, and costs, these programs also establish guidelines on when to turn off trucks instead of letting them idle.
According to the Environmental Protection Agency (EPA), most U.S. states have implemented strict regulations on truck idling to reduce greenhouse gas emissions and pollution. By implementing tactics to reduce idling, fleets can achieve significant cost savings.

U.S. labor market raises red flags on Wall Street
The U.S. labor market closed 2025 with clear signs of weakening, as evidenced by the latest employment data released in December. In the latest episode

DOT finds half of North Carolina CDLs were issued illegally
The DOT warns that half of North Carolina’s CDL licenses are irregular after a federal audit uncovered serious compliance failures. The findings directly affect truckers, fleets, and transportation companies, raising urgent questions about road safety, legal operations, and the future of the trucking industry.

California’s Unhealthy Air: Impacts on Trucking and Freight
Unhealthy Air Quality in California: What Repeated Pollution Alerts Mean for Trucking and Freight Operations

Global Road Freight on Track to Hit USD 5 Trillion by 2033
Global Road Freight on Track to Hit USD 5 Trillion by 2033 as e-commerce growth, supply chain restructuring, and technology adoption accelerate demand for road-based cargo transport worldwide.

California misses DOT deadline risking $160 million in federal funding
The state of California has reached the deadline set by the DOT to take action regarding the situation involving the number of non-domiciled CDLs issued

Health on Wheels: How to Prevent the Most Common Conditions on the Road
Health on wheels matters for anyone who spends long hours on the road. How to prevent the most common physical and mental conditions and maintain healthier routines while working behind the wheel.