What happens if a vehicle exceeds the height limit and enters—what are the risks and liability issues?

If a vehicle exceeds the stated height limit and strikes a height-restriction barrier, it can cause serious damage to both the vehicle and the barrier structure — and potentially injure the driver or nearby pedestrians.

The main risks include:

1. Vehicle & Structural Damage – Collision with the cross-beam can bend or shear steel components, damage the barrier’s foundations, or cause costly repairs to overhead canopies and property.
2. Safety Hazards – Falling debris or a displaced barrier can create a significant health and safety risk within public car parks or access roads.
3. Operational Disruption – Damaged barriers may block entry routes and cause site downtime or restricted access until repairs are made.

From a liability standpoint, the site operator or property owner has a duty of care under the Health & Safety at Work Act 1974 and Occupiers’ Liability Act 1957 to ensure barriers are clearly marked, visible, and properly maintained.

To reduce risk:

• Install reflective RA1/RA2 signage showing metric and imperial height limits.
• Ensure signs are placed at approach routes and entry points at driver eye level.
• Keep barriers in good condition with routine inspections.

At Aremco Barriers, all UK-manufactured height-restriction systems are supplied with compliant reflective signage, clearance warnings, and robust steel construction to help prevent accidents, minimise liability, and maintain safe vehicle management across commercial and public sites.