STUDY OBJECTIVE To examine how child pedestrian exposure to risk, as measured by the mean number of streets crossed, varies according to indices of material disadvantage and ethnic group. DESIGN A questionnaire on pedestrian exposure to risk was distributed to children for completion by parents and return to school. Children from 40 schools were selected using a probability cluster design. ...

This study introduces a comprehensive representation of the public domain in urban space, discusses the role of machine learning techniques in such a representation, and presents a preliminary experiment. We define "public domain" as all places that people actually perceive as public space— traditionally identified spaces such as streets, squares, parks, as well as privately managed collective ...

Environmental noise management is an important part of the policy across the European Union policy context, because transportation and industrial noise is a significant local environmental problem for most of the urban population. Increasing number of vehicles is associated with growing noise level from road transport in urban areas and rising public health problems. Motor transport is consider...

Mean streets represent those connected subsets of a spatial network whose attribute values are significantly higher than expected. Discovering and quantifyingmean streets is an important problem with many applications such as detecting high-crime-density streets and high crash roads (or areas) for public safety, detecting urban cancer disease clusters for public health, detecting human activity...

We consider the problem of a robot inside an unknown polygon that has to nd a path from a starting point s to a target point t. We assume that it is equipped with an on-board vision system through which it can get the visibility map of its surroundings. Furthermore, we assume that the robot is contained in a simple polygon that belongs to the class of generalized streets. We consider three prob...

We explore geometry of London’s streets using computational mode of an excitable chemical system, Belousov-Zhabotinsky (BZ) medium. We virtually fill in the streets with a BZ medium and study propagation of excitation waves for a range of excitability parameters, gradual transition from excitable to subexcitable to non-excitable. We demonstrate a pruning strategy adopted by the medium with decr...