Abstract
New information/communication technologies certainly hold great potential to make more efficient use of existing and new transport facilities, but serious questions arise concerning their likely impact on environmentally sustainable futures. Validity of the substitution hypothesis, that transportation will give way to communication, is increasingly in doubt. The European Union recently issued a call for tenders for a regional telecommunications atlas to describe the state of infrastructure and service provision on a regional level. A similar effort is needed in North America to more clearly identify the relationship of such technologies to transportation and to monitor the space-time diffusion of their accessibility.