Post & Cable

Post and Cable Barrier System
TypePassive Barrier
Often Used With

Access Control, Signs and Signals



The purpose of the Cable Barrier System is to prevent threat vehicles from exiting the Access Control Point response zone and avoiding the controlled entry into the installation. Cable Barrier Systems are also designed to assist in preventing potential head-on collisions by capturing and redirecting errant vehicles that would otherwise traverse the median of a roadway. The specially designed posts with strategically positioned cables increase the system’s ability to restrain various types of vehicles. Cable barrier systems are a cost-effective solution and are preferred by contractors for their ease of installation and broad Federal Highway Administration accepted applications.


Round 3/4-inch wire cables are pre-stretched during manufacturing to reduce stretching during impact. They are interwoven around special steel posts and securely anchored to the ground at each end. The wire cables consist of three strands (seven wires per strand) and have a minimum tensile strength of 110 kN. Each pre-stretched wire rope is highly tensioned, and with the three strand weave creates high post/cable friction. This causes each post to act as a “mini-anchor,” which helps limit the extent of damage during impacts. These cable barriers assure satisfactory performance even around tight curves. Another major benefit of the interwoven wire ropes is that deflections are more predictable, even when long sections are impacted.


Full-scale vehicle crash/impact testing has been used to evaluate the safety performance of our TL3 and TL4 longitudinal cable barrier systems. All testing procedures were conducted as prescribed by the National Cooperative Highway Research Program Report 350, Recommended Procedures for the Safety Performance Evaluation of Highway Features.