The purpose of this European standard is to specify rules and limits for track alignment design parameters, including alignments within switches and crossings. Several of these limits are functions of speed. Alternatively, for a given track alignment, it specifies rules and limits that determine permissible speed. This European Standard applies to track gauges 1435 mm and wider with speeds up to 360 km/h. Informative Annex A describes the conversion rules which shall be applied for tracks with gauges wider than 1435 mm. Normative Annex B is applied for track gauges wider than 1435 mm. This European Standard is also applicable where track alignment takes into account vehicles that have been approved for high cant deficiencies (including tilting trains). More restrictive requirements of the Technical Specifications for Interoperability (TSI) and other (national, company, etc.) rules will apply. This European Standard need not be applicable to lines, or dedicated parts of railway infrastructure that are not interoperable with railway vehicles tested and approved according to European Standard EN 14363.