
We’ve recently electrified the Coryton line and the Rhymney line, from Cardiff Queen Street to Caerphilly. This marks a significant milestone in the South Wales Metro programme and will allow us to introduce new trains on the Coryton line from Summer 2025.
The overhead power lines carry 25,000 volts, making it extremely dangerous for any persons to come close to the overhead wires.

Whilst there is no danger to people using the railway correctly, anyone who does not respect the railway boundary, the fence line that protects both people and the operational railway from deliberate or accidental trespass, are placing themselves at risk.
Testing the Overhead Line Equipment
Saturday 05 to Sunday 06 April 2025
We'll shortly be testing the Overhead Line Equipment across the Coryton and lower Rhymney lines to ensure it’s working properly. During this weekend, no trains will run on the Coryton and Caerphilly to Penarth lines, and we encourage passengers to check before they travel.
To ensure the safety of the public during the testing period, we’ll need to close several footbridges that cross the railway line, including all level crossings and station footbridges, on Saturday 05 and Sunday 06 April 2025.
Closures on the Coryton line:
Whitchurch level crossing
Ty Glas level crossing
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Rhiwbina station footbridge
What Three Words: ///agenda.drums.gently

Closures on the Lower Rhymney line:
Lisvane & Thornhill station footbridge
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Road closures
The following roads will be closed, with vehicle diversions in place, from 8am to 8pm on Saturday 05 April and Sunday 06 April:
Highfield Road Overbridge
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This road will be closed for both vehicles and pedestrians. To ensure pedestrians can cross the railway safely, we’ll be running a shuttle bus between the bus stops on Allensbank Road and Lake Road West, which will run from 08:00 to 20:00 on Saturday 05 and Sunday 06 April.
A diversion will be in place to direct cars over the railway via Wedal Road, to the South of Highfield Road.

Heath Halt Overbridge
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Heath Halt overbridge, situated next to Heath Low Level station, will be closed to vehicles, with a diversion route in place. The bridge will remain open for pedestrians.
The diversion route for vehicles is shown in red.

Traffic management
To ensure that pedestrians can still cross other road bridges over the railway safely we will have traffic management in place.
From 08:00 to 20:00 on Saturday 05 and Sunday 06 April there will be traffic management in place on the following bridges, to allow us to maintain single-lane traffic over the bridge and ensure a safe distance from the sides of the bridge for pedestrians:
Pantbach Road
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Station Road
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What should I do if I see someone trespassing on the railway?
Anyone trespassing on the railway is at risk of serious injury and/or death. If you see anyone on the railway who you believe is not supposed to be there, please call 999 as soon as you can.
For non - emergencies, please text the British Transport Police on 61016.
More information
You can read more about OLE here.
More information on our No Second Chances safety campaign can be found here.