
Truck Mounted Attenuator
At Keloka Traffic Management, we prioritize safety above all else, especially when our team members are working in high-risk environments, such as construction zones, road maintenance, or accident response areas. One of the most effective tools in our traffic control arsenal is the Truck Mounted Attenuator (TMA)—a vital safety device that helps protect workers, equipment, and road users when working adjacent to traffic.
A Truck Mounted Attenuator is designed to absorb the kinetic energy of a vehicle impact, acting as a “crash cushion” when a collision occurs. Mounted at the rear of a safety truck, the TMA acts as a barrier between oncoming traffic and the workers or vehicles involved in road work or traffic management. With the TMA in place, we are able to reduce the risks associated with high-speed traffic and ensure the safety of everyone involved.
What is a Truck Mounted Attenuator (TMA)?
A Truck Mounted Attenuator (TMA) is a device that absorbs the energy from a collision by utilizing a kinetic energy dissipation system. It is typically mounted to the rear of a truck, which serves as a mobile barrier. The primary purpose of the TMA is to protect workers, traffic control personnel, and equipment from being hit by errant vehicles.
In simple terms, a TMA is a crash cushion that is designed to reduce the impact of a collision in order to minimize damage and injury. These devices are particularly useful in work zones, emergency response situations, or areas where workers are exposed to moving traffic.
When a vehicle crashes into the rear of the TMA-equipped truck, the device absorbs the force of the impact, gradually decelerating the vehicle in a controlled manner. This minimizes the severity of the collision, reducing the potential for injury to workers or drivers and preventing damage to equipment.

Why Is a TMA Important?
1. Enhanced Worker Safety
The primary benefit of a Truck Mounted Attenuator is enhanced safety for workers in construction zones or traffic management areas. Many work zones are located on or near high-traffic roads, where vehicles travel at high speeds. Workers performing tasks such as flagging traffic, directing detours, or maintaining infrastructure are at risk of being hit by moving vehicles. A TMA helps mitigate this risk by absorbing the energy from a collision and preventing direct contact between vehicles and personnel.
2. Protection of Equipment
In addition to protecting workers, the TMA also helps safeguard valuable equipment and vehicles involved in the traffic control operation. Traffic management setups often include expensive machinery, such as cranes, road signage, and other infrastructure. The impact of a collision could cause significant damage to these pieces of equipment, leading to costly repairs or replacements. The TMA serves as a protective barrier, absorbing much of the impact force and preventing damage to critical equipment.
3. Reduced Risk of Secondary Accidents
In high-traffic areas, accidents can lead to secondary incidents. A collision with a vehicle can cause chain reactions, such as debris scattering into traffic or vehicles being pushed into other lanes. The TMA helps reduce the likelihood of such secondary accidents by controlling the impact and preventing the truck from being pushed into the path of other vehicles. This can help maintain a safer overall environment for both workers and drivers.
4. Compliance with Safety Standards
In many regions, including Kelowna and the Okanagan Valley, work zones and road maintenance areas are subject to strict safety regulations. Truck Mounted Attenuators are an essential part of complying with these safety requirements. Having a TMA in place not only ensures the safety of your team but also helps you meet local traffic control regulations, avoiding potential fines or penalties associated with inadequate safety measures.
5. Minimizing Disruptions
A Truck Mounted Attenuator helps keep traffic moving in work zones by protecting workers and equipment while minimizing delays. The TMA allows for smoother operations, reducing the chances of accidents or stoppages caused by collisions. This ensures that roadwork and other traffic management tasks are completed more efficiently, leading to fewer disruptions for the general public.
How Does a TMA Work?
A Truck Mounted Attenuator is a kinetic energy-absorbing device designed to handle impacts in various ways. When a vehicle collides with the rear of the truck, the TMA functions by gradually decelerating the vehicle in a controlled fashion. Here’s how it works:
- Absorbing Kinetic Energy: The TMA uses a series of energy-dissipating components, such as crushable materials or hydraulic systems, to absorb the energy from the collision. The device is designed to gradually reduce the speed of the vehicle, preventing the force of the impact from being transferred to the truck or personnel.
- Controlled Impact: The TMA is engineered to ensure that the vehicle comes to a safe stop, reducing the chances of the vehicle being pushed into the work zone or other traffic lanes. By controlling the deceleration process, the TMA helps prevent additional accidents.
- Modular Design: Many modern TMAs are designed with modular components that can be easily replaced or repaired after an impact. This minimizes downtime and ensures that the safety system remains functional throughout the duration of the project.
- Rear-Mounted Setup: The TMA is typically mounted at the rear of a safety truck, creating a barrier between workers and oncoming traffic. This placement allows for better protection, as the truck can be positioned in a way that shields workers and equipment.

Applications of Truck Mounted Attenuators
Truck Mounted Attenuators (TMAs) are used in a variety of traffic control settings, particularly where there is a high risk of accidents. Common applications include:
- Construction Zones: TMAs are often used in road construction zones, where workers are frequently exposed to moving traffic. Whether it’s for road repair, bridge work, or infrastructure maintenance, TMAs provide critical protection for personnel.
- Traffic Control and Flagging Operations: When flaggers are directing traffic in construction zones or detours, a TMA-equipped truck is positioned to provide a protective barrier between the flaggers and oncoming vehicles.
- Emergency Response: During emergency situations, such as accidents or natural disasters, TMAs are used to protect emergency responders and equipment while managing traffic around the scene.
- Public Events: Large public events such as marathons, parades, or concerts may require TMAs to protect personnel and traffic control equipment while ensuring public safety.
Why Choose Keloka Traffic Management?
At Keloka Traffic Management, we provide high-quality, reliable Truck Mounted Attenuators as part of our comprehensive traffic control services. We prioritize safety, ensuring that your team and equipment are protected in even the most high-risk environments.
- Expert Operators: Our team is trained to deploy and operate TMAs efficiently, ensuring maximum protection in any traffic control situation.
- Comprehensive Solutions: We offer a full suite of traffic control services, from equipment rentals to on-site management, including TMA setup and monitoring.
- Safety First: We are committed to ensuring the safety of both workers and the public, minimizing risks and ensuring compliance with local safety standards.

Get in Touch with Keloka Traffic Management
If you’re looking for reliable and effective traffic control solutions that include Truck Mounted Attenuators, Keloka Traffic Management is here to help. Contact us today to discuss how we can enhance the safety of your next project or event with our TMA services.