This paper describes an efficient urban outdoor and indoor wave propagation model that supports receiver performance and coverage analyses as well as system effectiveness analyses within urban canyon environments described in the Compact Terrain Database (CTDB) format. The model has been used to support Joint MEASURE based analyses of GPS III performance/coverage within a typical urban environm...

Design and implementation of health-promoting community interventions can advance public health and community well-being; however, realization of such programs is often challenging. Even more challenging is the implementation of ecologic interventions to revitalize built urban environments. A structured intervention entitled ;Intersection Repair; was devised in Portland, Oregon, by a non-profit...

User mobility characteristics and cell shapes in urban microcellular environments are different from those in macrocellular environments because pedestrians walk along streets and radio signals are guided by tall buildings lining both sides of the streets. Urban area microcell shapes follow approximately the street pattern. In this paper, we characterize low-tier user mobility in typical urban ...

Congestions of the traffic flow within the urban traffic network have been a challenging task for all the urban developers. Many approaches have been introduced into the current system to solve the traffic congestion problems. Reconfiguration of the traffic signal timing plan has been carried out through implementation of different techniques. However, dynamic characteristics of the traffic flo...

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Population is steadily increasing worldwide resulting in intractable traffic congestion in urban dense areas. Adaptive Traffic Signal Control (ATSC) has shown strong potential to effectively alleviate urban traffic congestion by adjusting the signal timing plans in real-time in response to traffic fluctuations to achieve desirable objectives (e.g., minimize delay).The problem of coordinated ATS...

The traditional way of controlling urban traffic is using centralised control approaches: There is a single control centre where decisions are made about the traffic control in the whole urban area. Currently, this paradigm is shifting towards more decentralised hierarchical approaches with smaller control centres serving sub-regions of the intersection network in a city. The paper reviews poss...

OBJECTIVES In urban settings, pedestrian fatalities and injuries are concentrated on major roads. This study aims to describe urban intersections with major roads (arterials and collector roads) and explore the association between intersection characteristics and injured pedestrians. METHODS From a stratified random sampling in Montréal, Quebec, 512 intersections were selected and their chara...