When a semi truck collides with another vehicle, the harm often extends far beyond physical injuries. Medical bills arrive faster than they can be opened, and every conversation with an insurance adjuster may leave an injured person with more questions than answers. On top of everything else, the legal and trucking industry jargon can make it even harder to see the path forward.
One phrase that may appear in trucking accident cases is ‘semi truck governor.’ This is not a political position or an optional gadget—it is a safety device. Understanding what it is and how it functions can provide important context for a personal injury claim.
Marker Law, LLC, combines more than 25 years of trial experience with a commitment to clear communication and client-centered service, ensuring clients do not have to navigate technicalities alone.
Contact us today at 331-295-8005 to discuss your case and learn how we can help you.
What Truck Speed Limiters Have to Do with a Claim
A semi truck governor, also called a speed governor for trucks, is a device that electronically restricts the maximum speed a truck can travel. The primary purpose is to reduce the risk and severity of crashes by preventing trucks from reaching unsafe speeds.
From a legal standpoint, the presence or absence of a functioning governor can be highly relevant. If a semi truck without a governor—or with a tampered governor—was involved in a crash, it could indicate negligence by the driver, the trucking company, or the maintenance provider. Accident reconstruction experts can analyze vehicle data to determine whether the truck exceeded safe or lawful limits.
The use of governors can also influence settlement negotiations. If evidence shows someone failed to install or maintain a required speed limiter, it may strengthen a claim by demonstrating a disregard for company safety regulations. In court, such facts can help establish liability and potentially support higher damages for reckless conduct.
Lack of a Semi Speed Limiter Mandate
In 2016, the US Department of Transportation’s Federal Motor Carrier Safety Administration proposed a semi-speed limiter mandate for any commercial vehicle weighing over 26,000 pounds. The proposal discussed allowing maximum speeds ranging from 60 to 68 miles per hour.
However, this proposal never became an official rule. In 2025, the federal government withdrew the proposal before finalization. While many other countries require truck speed limiters, it now appears unlikely that the United States will adopt a similar mandate in the near future.
At the state level, there is no speed limiter mandate for commercial vehicles in Illinois or any other U.S. state. However, this could change. For example, in 2024, a California state legislator introduced a bill that would have required all new vehicles, starting with 2030 model years, to be equipped with passive speed limiters. Although Governor Gavin Newsom ultimately vetoed the bill, similar proposals have surfaced in other states.
Federal agencies such as the National Transportation Safety Board and the Federal Motor Carrier Safety Administration have also voiced support for speed-limiting technology for large commercial vehicles as a way to reduce speeding-related crashes and fatalities.
Company-Based Semi Truck Governor Rules
While companies are not required to equip each commercial vehicle with a speed governor for trucks, some may choose to do so anyway. Establishing internal semi truck governor rules can result in:
- Lower fuel costs,
- Lower insurance premiums,
- Lower wear-and-tear costs, and
- Significantly fewer crashes.
Marker Law evaluates the presence and function of truck speed limiters as part of a thorough case investigation. For instance, if a company installed speed limiters, but the device on the semi truck involved in the crash malfunctioned, the firm may investigate potential manufacturer liability. The analysis may also include whether the driver manipulated the device, which could demonstrate negligence.
Frequently Asked Questions
Here are a few of the most frequently asked questions about speed governors.
What Is a Governor in a Semi Truck?
A semi truck governor is an electronic device that limits the vehicle’s speed. It works through the truck’s engine control module, capping the maximum speed at a pre-set limit.
What Speed Are Semi Trucks Governed at?
The speed can vary based on company policy. Typical limits range from 60 to 68 mph.
Is Removing a Speed Governor Illegal?
Tampering with or removing a speed governor is illegal when regulations require its use. Even where it is not explicitly prohibited, altering safety equipment can be strong evidence of negligence in the event of a crash.
Contact Marker Law
While this information explains the role of semi truck governors, an injured person does not need to become an expert to protect their rights. Health and recovery should remain the priorities.
Marker Law works to relieve clients of the legal burdens associated with truck accident claims by:
- Connecting clients with trusted medical providers;
- Handling all communications with insurance companies and opposing counsel;
- Collecting all the documentation needed to show the full extent of recoverable damages;
- Preserving critical evidence from the accident, the vehicle, the driver, and the companies involved;
- Using advanced technology to analyze crash circumstances, and
- Engaging mechanical, medical, and other experts to support the case.
If someone has been injured in a semi truck crash, Marker Law offers a free consultation to review the situation and explain available legal options. Recognized by Super Lawyers for over a decade, the firm draws on its experience, community connections, and advocacy skills to pursue fair results for its clients.