With the large number of persons involved in this particular study it was decided that considerable time (money) could be saved by gathering into one volume extracts of available literature. Reports, studies by other groups, articles, information and literature in regard to environmental impact, transportation corridors, multiuse of rights-of-way, etc. have been reviewed and portions of some of these have been included. No attempt has been made to summarize, edit or abstract any of the material. Generally only a portion of the report such as the introduction and/or conclusions have been included in this volume.