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ICC bars on Semi trailer

In the world of road safety and commercial transportation, certain features on vehicles play pivotal roles in preventing accidents and ensuring the safety of all road users. One such feature is the ICC bar, also known as the underride guard, on the back of trailers. This blog post aims to shed light on the importance of ICC bars and why they are crucial for road safety.


What are ICC Bars?


ICC bars, named after the Interstate Commerce Commission that mandated their use, are metal bars attached to the back of trailers. They hang down to a specific height above the road. Their primary function is to prevent smaller vehicles from sliding underneath the trailer in the event of a rear-end collision.


The Importance of ICC Bars


1. Preventing Underride Accidents

   - Life-Saving Design: In accidents involving a smaller vehicle and a trailer, the lower height of the car can result in it going under the trailer. This can lead to catastrophic consequences, including severe injuries and fatalities. ICC bars prevent such underride incidents by acting as a barrier.


2. Compliance with Safety Regulations

   - Legal Requirement: The use of ICC bars is not just a safety measure but a legal requirement for trailers in many countries, including the United States. This regulation ensures a uniform safety standard across the industry.


3. Enhanced Visibility

   - Reflective Tapes: Many ICC bars are fitted with reflective tapes, increasing the visibility of the trailer at night or in low-light conditions. This is an additional safety feature that alerts drivers to the presence of the trailer ahead.


The Role of Regular Maintenance


- Inspections and Repairs: Regular inspections and maintenance of ICC bars are crucial. Damaged or improperly mounted ICC bars can compromise their effectiveness in preventing underride accidents.


- Industry Responsibility: It's the responsibility of truck owners and operators to ensure that these safety devices are always in optimal condition.




ICC bars on the back of trailers are a vital safety feature in the commercial transportation industry. They play a significant role in preventing tragic underride accidents and are a key component of the safety measures implemented to protect road users. As we continue to advocate for road safety, the importance of such features must be recognized and maintained by all stakeholders in the transportation sector. Remember, every safety feature, no matter how small, contributes to saving lives on the road.


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