Owing to the richer set of concepts which are involved in activity-based transportation models, the potential advantages of an activity-based approach for air quality purposes have been recognized for a long time. However, models that have been developed along these lines are still scarce. In...

Fractal dimension is an index which can be used to characterize urban areas. The use of the curve of scaling behaviour is less common. However, its shape gives local information about the morphology of the built-up area. This paper suggests a method based on a <?tf=“t906”>k-medoid for clustering these...</?tf=“t906”>

In this paper we explore further the use of fractal dimensions by comparing values for built-up spaces and values for road networks, both being estimated by the same method. This is done in an attempt to explain the differences theoretically and empirically, and to show how far both indices are...