3rd edition of this work. The study includes an introduction, historical surveys, a classification of the spectrum of aids as well as surveys of messages, meanings, subdivisions.

This monograph is the second edition of International Railway Signals. While it bears a substantial resemblance to the original study (1991) there are substantial changes. Terminology is a significant problem with ...

Table of contents is a collection of individual Table of Contents for the 15 current studies. A general preface is include This edition follows older format.

This study focusses on the integrative character of T-M forms. It brings together the various modes and safety aids. Semiotics, Communication, Information provide a foundation and internal linkage. T-M indicators, messages, ...