Abstract
This paper presents a method for deriving a joint distribution of trip length and its ratio to Euclidean distance between origin and destination when a travellers' trip distribution is given. This measure is useful for analyzing the spatial structure of transportation networks in terms of energy consumption and efficiency for trips. We calculate this measure using simple city models with two types of network pattern: rectangular grid and radial-circular. Computation of this measure for road networks with node-based, link-based, and area-based demand is also shown. the results show that radial-circular network provides efficient movement for longer trips.