Since newly created state departments of transportation have become a reality, new emphasis must be placed on inclusion of air, rail and urban transportation systems. Transportation services of all kinds will need to be improved to meet increasing travel and mode choice demand. The questions the papers in this issue of the Record pose and try to answer are: How much service should be provided? To where? Which mode? How will the modes interface and coordinate services, routes, passenger demands and schedules? Can older trip demand forecasting models be freshly applied to current trip forecasting and demand projections? The papers presented examine these questions and provide some guidance for understanding and considering the expanding demand for more travel and transportation options.

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