Törmäyskaite

Törmäyskaite, also known as a crash barrier or guardrail, is a safety device installed along roadsides and medians to prevent vehicles from veering off the road or crossing into oncoming traffic. Its primary function is to absorb and redirect the impact energy of a colliding vehicle, minimizing the severity of an accident and protecting occupants. These barriers are typically made of metal, such as steel or aluminum, although sometimes concrete or even timber are used.

The design of a törmäyskaite is crucial for its effectiveness. Common types include the W-beam, thrie-beam, and cable barriers. W-beam and thrie-beam barriers are rigid or semi-rigid systems consisting of interconnected metal sections supported by posts. When a vehicle impacts these barriers, the shape of the beams helps to deform and guide the vehicle back onto the roadway or absorb some of the kinetic energy. Cable barriers, on the other hand, are flexible systems of tensioned steel cables strung between posts. Upon impact, the cables sag and absorb energy, preventing the vehicle from penetrating the barrier or rolling over.

The placement of törmäyskaite is determined by factors such as road design, speed limits, traffic volume, and the presence of hazards like steep embankments or intersections. They are commonly found on highways, bridges, tunnels, and areas with high accident rates. Regular inspection and maintenance are essential to ensure that törmäyskaite remain in good condition and can effectively perform their safety function in the event of a collision.