Division 4.2.16 Maximum pressure variations in tunnelsF1 United Kingdom Repealed Original text. Later amendments are not shown. 4.2.16.1General requirements 4.2.16.2Piston effect in underground stations Annotations Textual amendments F1 Repealed by Commission Regulation (EU) No 1299/2014 of 18 November 2014 on the technical specifications for interoperability relating to the ‘infrastructure’ subsystem of the rail system in the European Union (Text with EEA relevance). ← Division Division 4.2.16 Division 4.2.16.1 →