Queensferry Crossing

The Forth Estuary forms one of the UK’s most critical transport corridors, anchored by the modern Queensferry Crossing and the adjacent Forth Road Bridge. Managing major incidents, adverse weather, or essential maintenance across these dual spans historically required manual traffic diversions. A process that took up to 6 hours and relied heavily on emergency services.

The automated VEVA Barrier System transformed this workflow by completing a full multi-bridge diversion in just 19 minutes, with the physical barrier deployment executing in 4 minutes and 20 seconds. HF Controls now provides full maintenance, 24/7 technical support, and operational readiness to guarantee total reliability for this critical infrastructure asset.

Reducing Operational Downtime & Manual Interventions

When severe incidents or weather conditions disrupt traffic on the Queensferry Crossing, traffic must be rerouted onto the Forth Road Bridge. Historically, deploying traditional diversion measures presented major operational hurdles:

• Protracted Response Times: Manual barrier placement and traffic control routinely took up to 6 hours to fully establish.
• Heavy Resource Dependence: The setup required direct, immediate intervention from Police Scotland and road maintenance crews.
• Economic & Safety Risks: Extended delays increased queue lengths, exposed motorist streams to road hazards, and cost the regional economy millions in travel disruption.

Automated VEVA Barrier System

To mitigate these risks, Transport Scotland introduced the VEVA Traffic Diversion Barrier System on both northbound and southbound approaches to the estuary crossings.

Following the initial hardware setup by Spie, HF Controls took charge of long-term control system support, operational maintenance, and emergency response capabilities.

Key Technical & Operational Features

• Sub-5-Minute Physical Deployment: Remote control mechanisms actuate physical traffic diversion barriers into position across lanes in just 4 minutes and 20 seconds.
• Autonomous Operations: Operators can execute full crossover diversions without waiting for initial, direct police intervention on-site.
• Integrated Control Systems: System monitoring and activation logic are embedded directly into regional traffic management networks, maintaining operational integrity across both bridges.

Results & Live Validation Performance

A simultaneous live validation test across both the Queensferry Crossing and the Forth Road Bridge verified the performance metrics of the automated system:

HF Controls’ Long-Term Operational Role

Maintaining critical infrastructure requires continuous technical oversight. HF Controls ensures system uptime across three operational pillars:

1. Proactive Maintenance: Routine servicing and testing of electronic, hydraulic, and mechanical control hardware to prevent system failure.
2. 24/7 Emergency Response: On-call technical dispatch teams available around the clock to rectify operational issues under extreme pressure.
3. Live System Validation: Partnering with BEAR Scotland and Transport Scotland to conduct periodic real-world stress tests and software updates.

By eliminating up to 5.5 hours of network gridlock during major bridge closures, the VEVA system sets a new standard for transport resilience in Scotland.