Reducing maintenance costs and providing timely improvement of transportation facilities are the major goals of public transportation agencies for the preservation of the existing infrastructure. Throughout the years, some agencies have not been able to accomplish these goals by using the traditional methods of preservation. As a result of this, such agencies considered privatization as an alte...

1 Abstract Road Safety in the Context of Urban Development in Sweden and California Road safety is a serious public health issue throughout the world, with more than one million people killed in traffic accidents each year. Despite the severity of its health impacts, the World Health Organization says that traffic safety is a "neglected" topic. Perhaps this is the case in the US, where traffic ...

In many practical problems, it is desirable to nd an equilibrium. For example, equilibria are important in transportation engineering. Many urban areas suffer from traf c congestion. Intuitively, it may seem that a road expansion (e.g., the opening of a new road) should always improve the trafc conditions. However, in reality, a new road can actually worsen traf c congestion. It is therefore ex...

Automated road information extraction enables the ready creation, maintenance, and update of the transportation network databases used for traffic management and automated vehicle navigation. This paper presents a semi-automatic method for road network extraction from high-resolution satellite images. First, we focus on detecting the seed points in candidate road regions using a Kohonen-type se...

GIS-Based Road Characteristics Analysis Tool Track: Transportation Author(s): Chunguang Zhang Wilbur Smith Associates has developed a GIS based analysis tool in ArcGIS that can provide easy user access to the Georgia Department of Transportation(GDOT) Road Characteristics and other related traffic information. The tool can query and visually display the information at a county wide or road/segm...

This paper offers a broad overview of road pricing from a social welfare perspective. I first examine two common objectives of road pricing: congestion management and profit making. My goal is to provide a guideline explaining how to promote a social-welfare-enhancing road pricing scheme. To this end, we should: (i) consider and improve public transportation systems by providing more environmen...

In most of the developing countries, the metropolitan organizations do not assess the safety consequences of alternative transportation systems and one of the reasons is the lack of suitable methodology. The goal of this paper is to develop practical tools for assessing safety consequences of arterial roads in the context of long-term urban transportation plans in Dhaka city, the capital of Ban...

In an urban area the determination of transportation routes should be planned so as to minimize the provoked pollution taking into account the cost of such routes. In the sequel these routes are cited as pollution routes. The transportation network is expressed by a weighted graph ( ) , , , G V E D P = where every vertex represents a location to be served and E contains unordered pairs (edges) ...

Developing countries often have rich natural resources but poor infrastructure to capitalize on them, which leads to significant challenges in terms of balancing poverty alleviation with conservation. The underlying premise in development strategies is to increase the socio-economic welfare of the people while simultaneously ensuring environmental sustainability, however these objectives are of...