When a barrier fails to contain a vehicle it’s often because the vehicle has vaulted over it. This can occur because of several factors:
- Older barrier systems: These are typically lower than modern barriers, which have been designed with increased height to account for taller vehicles in today’s fleet.
- Road surface overlays: These reduce the effective height of the barrier, making vaulting more likely.
If barriers are identified as too low, some solutions include:
- Replacement: Install a newer, higher barrier system that meets current standards.
- Retrofit devices: For some barriers, devices like the Abraham blockout can be added to increase the height of the rail without replacing the entire system.
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