![]() Trains operating at speeds faster than 125 mph (for example on High Speed 1) use an in- cab signalling system that automatically determines and calculates speed restrictions. ![]() This is the maximum speed at which the train can travel safely using line-side signalling if the train runs any faster, it will not be possible for the train driver to safely read colour-light signalling. The use of lineside signals in Britain is restricted to railways with a maximum speed limit of up to 125 miles per hour (201 km/h). It is a development of the original absolute block signalling that is still being used on many secondary lines. ![]() The modern-day system mostly uses two, three, and four aspect colour-light signals using track circuit – or axle counter – block signalling. The railway signalling system used across the majority of the United Kingdom rail network uses lineside signals to control the movement and speed of trains. Network Rail two-aspect colour-light railway signal set at danger JSTOR ( September 2023) ( Learn how and when to remove this template message).Unsourced material may be challenged and removed.įind sources: "UK railway signalling" – news Please help improve this article by adding citations to reliable sources. This article needs additional citations for verification.
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