Abstract

This report examines historical rates of change in the transportation stock as a result of the introduction of new or improved technologies. Organized by mode, it highlights selected technological changes in motor vehicles (including automobiles, trucks and buses), light and heavy rail transit, rail passenger and freight systems, commercial and general aviation, merchant shipping, and pipeline systems. As appropriate, these improvement are related to salient features of the technology under examination, the transportation system into which it was introduced, and general social or economic conditions. As a tool for long-range planning in the area of technology commericalization, the document is intended to provide background material against which to gauge maximum and likely rates of change (or acceptance) that may be anticipated following the introduction of new or greatly improved transportation technologies. /Author/

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