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BS PD ISO/TR 8955:2025 Railway infrastructure. Track quality evaluation. Chord-based method
standard byBSI Group , 04/03/2025
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This document describes the relationship between an inertial measurement system and a chord measurement system applying the chord-based method with different chord length and chord division.
This document is applicable to 1 435 mm and wider track gauges. This document does not apply to urban/light rail systems, tramways and any track gauge narrower than 1 435 mm.