The Sentry™ Truck Mounted Attenuator (TMA) is a mobile crash protection system engineered to absorb and dissipate impact energy during rear-end collisions. Installed on the rear of maintenance trucks and work-zone vehicles, it significantly reduces crash severity while protecting road workers, drivers, and roadside equipment.
Manufactured using high-strength steel and advanced energy-absorbing components, the Sentry™ TMA delivers reliable performance under demanding highway conditions. Its durable construction ensures long service life, corrosion resistance, and minimal maintenance.
Designed in accordance with internationally recognized crash-testing standards and compliant with the current NCHRP350 rules, the system is ideal for highway maintenance operations, construction zones, emergency response vehicles, and temporary traffic management applications.
What is a Truck mounted attenuator?
The Sentry™ Truck Mounted Attenuator is a system that can be mounted on all types. It has a suitable weight that doesn’t affect the smooth movement of the truck and can be provided with an adjustable height that allows adaptation to different conditions of trucks.
It is designed with ideal dimensions that don’t cause problems for the driver while driving.
The tma truck mounted attenuator is equipped with LED indicator lights to show the direction to drivers behind the truck, and any type of traffic sign can be installed on it upon request.
Technical Specifications
• Compliance: MASH crash-tested
• Installation: Rear-mounted on maintenance vehicles
• Material: High-strength galvanized steel
• Energy Absorption: Progressive impact attenuation
• Application Speed: High-speed highways
• Maintenance: Low
• Visibility: High-reflective rear markings
Applications of TMA
• Highway maintenance vehicles
• Road construction projects
• Temporary work zones
• Bridge maintenance
• Emergency response vehicles
• Utility maintenance operations
• Airport maintenance roads
• Municipal road maintenance
• Expressway operations
Uses of the TMA truck mounted attenuator
When vehicles collide with trucks, the TMA truck mounted attenuator absorbs the impact energy and causes the rear-end vehicle to bounce back, minimizing damage to the truck and the vehicle as much as possible and protecting the contents of the truck as well as individuals or vehicles in front of the truck.
Features of Sentry™ Truck Mounted Attenuator
- High-quality material characterized by durability and flexibility.
- Fully galvanized.
- High-visibility reflective rear panel.
- Easily installation and replaceable cushion with hydraulic lift.
- Low maintenance requirements.
- Cushions can be replaced safely, quickly, and efficiently with the help of a forklift truck.
- Compact dimensions: under 3 meters of cushion length.
- Designed for high-speed highway environments.
- Compatible with speeds from 70 km/h to 100 km/h.
- Can bring a 2,000 kg vehicle to a complete stop.
- MASH-compliant crash attenuation system.
- Protects maintenance crews and motorists.
- Long operational lifespan.
Why Use a Truck Mounted Attenuator?
Rear-end collisions are one of the most common risks in highway maintenance and construction work zones. A Truck Mounted Attenuator (TMA) protects both road workers and motorists by absorbing impact energy before it reaches the maintenance vehicle.
During a collision, the attenuation system progressively dissipates crash energy, reducing vehicle deceleration and minimizing injuries, vehicle damage, and infrastructure losses.
The Sentry™ TMA improves work-zone safety while helping contractors and highway authorities comply with modern road safety standards.
