ROAD SAFETY BARRIER SYSTEM TYPES
A road safety barrier is used for shielding of vehicle and reducing the hazard of collision / crash.
A variety of road safety barrier systems can be used to meet specific site and project requirements.
The road safety barrier for highway shall meet standardised procedures for the crash testing and evaluation of both permanent and temporary road safety features, including barriers, sign supports, etc.
We have supplied Road Safety Barrier Systems for many countries, with excellent performance. While different types of barriers have road safety features that meet a given test level, they generally have different performance characteristics.
TYPES OF ROAD SAFETY BARRIER SYSTEMS
Flexible Roadside Barrier Systems
Flexible barrier systems, e.g. wire rope barriers, are generally more forgiving than other types because most of the impact energy is dissipated by deflection of the barrier and lower impact forces are imposed on the vehicle and its occupants.
All wire rope barriers approved for use on state highways have different deflection characteristics for a given NCHRP 350 test level.
Semi-rigid Roadside Barrier Systems
Semi-rigid barrier systems, e.g. W-Beam and Thrie-Beam barriers, are the most common type of road safety barrier used in New Zealand. This type of system redirects vehicles mainly by the beam action of the relatively strong steel rails transferring impact loads to closely spaced posts, which in turn transfer the loads to the ground.
Semi-rigid barrier systems have much less lateral deflection than flexible systems.
Examples of semi rigid road safety barrier systems available in New Zealand are:
• Strong Post W-Beam - TL-3
• Strong Post Modified Thrie-Beam - TL-4.
