Probed is the available evidence on whether the astonishing rapid development of communications technologies in the present centruy has to date, or is likely in the near future to reduce the demand for transportation. The author finds that there certainly appear to be transportation-communication tradeoffs, but that their apparent consequences to date have been profoundly to alter the nature of transportation demand rather than reduce overall volume. It would appear that transportation will remain a central arena of public policy for a good many years to come, but likewise that communications innovations are likely to have continuing najor effects on the evolution of transportation demand patterns.