ORE (D22) test length of concrete sleepers between Aaran and Rupperswil (swiss federal railway) observations from an inspection in Aug 1973 (TN-TS-019)

This length was laid in September 1958 following a suggestion by O.R.E. Committee D22, in order to compare the performance of different types of concrete sleeper assemblies and concrete sleepered track, in a main line with good formation. (A second length, containing a greater number of different types was also...