Local bus network is the most popular transit mode and the only available transit mode in the majority of cities of the world. Increasing the utility of this mode which increases its share from urban trips is an important goal for city planners. Timetable setting as the second component of bus network design problem (network route design timetable setting vehicle assignment crew assignment) hav...

This article addresses the problem of urban street mapping from new high resolution satellite images. The proposed algorithm is divided in two sequential modules: a topologically correct graph of the street network is first extracted, and streets are then extracted as surface elements. The graph of the network is extracted by a following algorithm which minimizes a cost function. The surface ex...

abstract: gridlock is an extreme traffic state where vehicle cannot move at all. this research studies the development of gridlock by theoretical and numerical analysis. it is shown that the development of gridlock can be divided into several stages. the core of the development is the evolution of congestion loop. a congestion loop is comprised of a number of consecutively connected spillover l...

We develop a macroscopic model for mixed urban and freeway traffic networks that is particularly suited for control purposes. In particular, we use an extended version of the METANET traffic flow model to describe the evolution of the traffic flows in the freeway part of the network. For the urban network we propose a new model that is based on the Kashani model. Furthermore, we also describe t...

Are interorganizational network ties “placeless” or “placed”? The study of organizations, particularly the study of interorganizational network ties, has reemerged in urban sociology, yet the urban literature on place and the organizations literatures on organizational network activity are not fully integrated. This article bridges these theories through an investigation of the social and spati...

People familiar with an urban environment share common spatial knowledge enabling, for instance, successful communication about places and routes. Mental representations of this spatial knowledge, as well as reasoning and communication processes are organized hierarchically. This paper introduces a hierarchical model of urban street networks motivated by shared experience of space. This model i...