Network Rail require systems to help them continue operation of their infrastructure during extreme weather with minimal disruption. These systems must be accessible to a range of users including asset managers, engineers, route control and signallers.

JF Strainstall installed systems to monitor conditions, including integration of local flood alerts from the Environment Agency and Natural Resources Wales. River levels are monitored closely and trackside cameras provide images of current status.

• River levels monitored, providing status with traffic light warning system (Red-Amber-Green)
• Analysis of rates of change drives warning system, informing
• Network Rail when rivers are likely to overtop
• Automated alerts transmitted by email and SMS
• Trackside cameras used by persons with BSN competency to authorise train at 20mph movements during and after flood conditions

The addition of Natural Resources Wales flood alerts provides an additional early warning system, as they are often transmitted before any rise in water levels can be detected. When flood conditions are forecast, the monitoring equipment reacts by increasing frequency of measurement and data transmittal. This improves the ability to predict flood times and obtain a live status (every 5 minutes).
These systems form part of Network Rail’s Extreme Weather Plan. Their use is stipulated in protocol for route control to allow safe and effective operation during difficult conditions.

• Trains can continue to operate under temporary speed restrictions, even in flood conditions.
• Following flooding, sections of line can be re-opened at 20mph if outputs of the monitoring equipment show no displacement of the deck.
• Operation is enhanced as it is no longer necessary to wait for
• Civil Examination
• Debris is detected with cameras, reducing need for inspections following floods