Acknowledgements

Acknowledgements

The authors would like to acknowledge the generous contribution made by others in the preparation of this chapter. Carlos Rodriquez and Joanne Holmes, at the Transport Research Centre, RMIT University, assisted with word-processing. Moreover, with regard to the development of thinking on this subject, many useful contributions and illuminating comments were received from the following people: Helen Battellino, Patrick Bonnel, Daniel Ekwalla Ekwalla Bouma, Kostas Goulias, Lidia Kostyniuk, Marion Kreitz, Matona Mafeka, Asteria Mlambo, Logan Moodley, A.M. Motubaste, Samuel Oni, Juan de Dios Ortuzar, Erkki Pahkinen, Virpi Pastinen, Durban Peters, Angeline Simana, Matthias Kracht.