Since their emergence in the 1930s, transport planning and engineering have developed a range of concepts which help planners to design networks and road infrastructures. 30th-hourly volume, peak 15-minute period, average daily traffic etc. Parallel though not integrated in these approaches, several economically oriented evaluation concepts, such as the cost-benefit analysis, have been conceptualized. The research need is the development of a modern dimensioning concept for transport infrastructure. The concept shall suitably consider the variability of travel demand as well as the infrastructure's capacity.