August 27, 2024
1 min read

The Aerodynamic Advantages and Benefits of Trailer Skirts | COOP by Ryder

Looking for ways to maximize stops at the pump when hauling goods on commercial trailers? When transporting loads, every mile counts, and fuel costs can significantly impact the bottom line. Finding ways to improve fuel efficiency is crucial, which is where trailer skirts (edge skirts or trailer side skirts) come in. These aerodynamic panels attach to the underside of trailers, and though they seem small, they offer big benefits for trailers.

Table Of Contents:

 

What Are Trailer Skirts and How Do They Work?

Trailer skirts, also known as trailer side skirts, are aerodynamic devices designed to reduce wind resistance under trailers. This resistance, called aerodynamic drag, significantly impacts fuel efficiency, especially at highway speeds.

 

Reducing Drag, Boosting Efficiency

Imagine a truck driving down the highway. As the truck moves, it creates an area of low pressure behind it. The larger this area, the more energy the truck expends to maintain its speed.

Trailer skirts minimize this low-pressure zone by partially covering the gap beneath the trailer, creating smoother airflow. Think of it like water flowing around a rock in a stream; trailer skirts help the air flow around the trailer more efficiently.

Studies, including one by the Delft University of Technology, show that aerodynamic truck trailers significantly cut fuel consumption and emissions, sometimes by up to 15%. This reduction translates into significant cost savings for businesses transporting goods and a reduced environmental impact.

 

Benefits of Using Trailer Skirts

This simple modification yields various benefits, from substantial fuel cost reductions to improved trailer stability. Trailer skirts can even give your business a leg up on the competition.

 

Fuel Savings

According to the North American Council for Freight Efficiency (NACFE), trailer skirts can improve fuel efficiency by 1% to over 5% compared to trailers without them. Considering the average semi-truck gets about 6.5 miles per gallon, this improvement can save hundreds, if not thousands, of dollars in fuel costs annually.

For example, say you are using 50 trucks, each traveling 120,000 miles yearly. That's about 18,461 gallons of diesel fuel annually per truck. If the average price of  diesel is around $3.80 per gallon, your yearly fuel bill per truck is about $70,152.

Adding trailer skirts and achieving a 3% fuel savings would save you around $2,105 per truck annually. Imagine the impact of those savings across your entire fleet.

 

Improved Stability

Besides fuel savings, trailer skirts contribute to trailer stability, especially in windy conditions. They help redirect airflow around the vehicle to minimize side-to-side movement, leading to a smoother, safer ride for drivers.

 

Reduced Environmental Impact

Trailer skirts offer a practical solution in an era of increasing environmental awareness. They help create a smaller carbon footprint for the trucking industry. Less fuel consumption directly translates to cleaner air and a healthier environment. These positive ecological effects resonate with businesses and consumers embracing sustainable practices.

 

What is a Trailer Tail?

You might know them as trailer skirts, but they're also called trailer tails. They're the aerodynamic panels you see behind semi-trailers. These panels smooth out the airflow, kind of like the spoiler on a race car. But these panels aren't about winning races, although they can help you save some green. A trailer tail reduces drag, which means less fuel your truck needs to burn. Less fuel burned means lower fuel costs for your business.

 

Types of Trailer Skirts

When choosing trailer skirts for your fleet, consider several types that cater to different needs and preferences.

  • Fixed Trailer Skirts: These skirts offer a permanent solution for improved aerodynamics and are ideal for long-haul trucking operations where consistent fuel savings are paramount.
  • Retractable Trailer Skirts: These skirts provide the flexibility to retract when not needed, such as during loading and unloading or when operating in tight spaces.
  • Customizable Trailer Skirts: For unique operational needs, some manufacturers offer customizable options tailored to specific trailer dimensions or applications.

 

State Requirements and Incentives for Trailer Skirt Usage

When it comes to the use of trailer skirts, regulations vary by state. Currently, trailer skirts are required in California, and other states, such as Texas and Georgia, have recently adopted, will be adopting, or are considering measures similar to California's. 

In California, for instance, the state's Air Resources Board (CARB) has specific regulations mandating the use of trailer skirts for certain commercial vehicles. 

On the other hand, states like New York and Illinois may offer incentives or rebates for companies that voluntarily use trailer skirts to reduce emissions and fuel consumption. 

Staying informed about the specific regulations in each state where vehicles operate is crucial to ensure compliance with local requirements and to potentially take advantage of available incentives.

You can visit the official website of the US Department of Transportation or the Federal Motor Carrier Safety Administration for more specifics about different trailer regulations. Additionally, we recommend you refer to individual state transportation department websites or contact their offices directly for detailed information on trailer skirt requirements and incentives specific to each state.

 

Cost Considerations

While the benefits of trailer skirts are undeniable, an upfront cost is involved. A good-quality set costs between $1,000 and $3,000, but renting trailers can help avoid the expense if a trailer is already equipped with this specialized equipment. Considering the potential fuel savings, cost-effective rental rates could lead to extra savings depending on how long trailers are rented for, mileage, and fuel prices.

 

Are Trailer Skirts Right for You?

Trailer skirts and trailer tails can be a smart investment for businesses. But how do you know if they're right for your operation?

Factors like the type of trucking you do, average truck distances covered, and whether fuel efficiency is a major concern all play a role.

To guide your decision-making, review this table, which showcases different operational scenarios and how well trailer skirts align with each:

Type of Operation Average Mileage Fuel Efficiency Focus Trailer Skirts/ Tails Recommendation
Long-haul trucking 100,000+ miles/year High Highly Recommended
Regional trucking 50,000 - 100,000 miles/year Moderate Recommended (depending on routes and fuel costs)
Local trucking 50,000 miles/year Low It may not be as beneficial due to lower mileage and predominantly city driving.

Remember, the decision ultimately depends on your specific circumstances. Analyzing your needs and weighing the pros and cons can help you determine if investing in trailer skirts is the right move for you. It's essential to remember that what works for one business may not work for another, so getting a personalized assessment with a trusted trailer rental partner like COOP by Ryder is key.

 

FAQs About Trailer Skirts

 

What are trailer skirts made of?

Trailer skirts are usually made from durable, lightweight materials that can withstand highway driving. Popular materials include aluminum, plastic, and fiberglass. These materials are lightweight to avoid significantly impacting the truck's payload capacity and are designed for easy installation and maintenance.

 

How long do trailer skirts last?

The lifespan of trailer skirts varies depending on the material quality, driving conditions, and maintenance. A good-quality set should last several years with proper care. Regular inspections and prompt repairs of minor damage can extend their lifespan.

 

Do trailer skirts require special permits?

Trailer skirts are legal in most jurisdictions but may have regulations regarding length, width, or material. It's best to check with your local Department of Transportation for specific requirements. Compliance with these regulations helps you avoid potential problems during roadside inspections.

 

Final Thoughts

Trailer skirts and trailer tails are a smart investment for businesses. They help improve fuel economy and contribute to cost savings and a greener future. As the trucking and transportation industry strives for greater fuel efficiency and reduced emissions, these simple yet effective devices are poised to become increasingly common.

With the COOP by Ryder rental solutions platform, you can get quick on-demand access to an extensive network of specialized dry van, reefer, and other trailers equipped with trailer skirts and additional features. Backed by Ryder’s team of experts and years of extensive knowledge in the industry, we’re empowering companies to maximize the potential of their fleet operations.

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