Division 4.3.4 Traction adhesion requirements
United Kingdom
To ensure a high availability of traction, the utilisation of adhesion shall not exceed the values given below:
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at start-up and at very low speed: 25 %
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at 100 km/h: 25 %
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at 200 km/h: 17,5 %
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at 300 km/h: 10 %.
In order to make the best of the adhesion available, interoperable rolling stock shall be equipped with an anti-slip system.