Route rationality scales (RRS) as a quality indicator of urban road networks and testing on selected cities

In this work, scales to measure the rationality of road networks have been developed for the purpose of determining the acceptability levels of (urban) travel routes from the geometry point of view. These scales have been studied under four headings: as the crow flies, average speed, alternative routes and angular deflection. Besides, in order to be able to evaluate all these scales simultaneously, a common scale concept has also been introduced. This, therefore, will enable us to compare the road networks of various cities. These scales have been applied on 15 different cities around the world using Google Maps, and the road networks belonginig to these cities have been ranked according to various rationality criteria.KEYWORDS: Transport planning, shortest route, Google Maps, road network geometry