T total cost of moving goods by truck over a highway system involves two basic compon~nts: -the public costs associated with construction and maintenance of the road network, and the privately financed costs of acquiring, operating, and maintaining a fleet of trucks. These publicly and privately financed costs are directly linked in many ways. For instance, the more trucks there are, the more w...

In the era of the North American Free Trade Agreement (NAFTA), the public and private sectors are increasingly committed to the growth of transport-oriented infrastructure, including ports, highways, bridges, and rail facilities. In particular there has been much interest in international bridges spanning the Rio Grande, the roads and rail lines leading to these bridges, and the port facilities...

Roads present formidable barriers to dispersal. We examine movements of two highly mobile carnivores across the Ventura Freeway near Los Angeles, one of the busiest highways in the United States. The two species, bobcats and coyotes, can disappear from habitats isolated and fragmented by roads, and their ability to disperse across the Ventura Freeway tests the limits of vertebrates to overcome ...

Many roads in the United States have approached the end of their design and/or service lives. In a recent report published by the American Society of Civil Engineers (ASCE), 42% of highways in the United States are congested and cost the economy about $100 billion in wasted time and extra fuel consumption. Due to the poor condition of the national highway network, it has been given a grade “D” ...

Nearly 18 years after the Government of Nigeria dismantled toll plazas along country’s highways, there is renewed interest by present administration to re-introduce roads help finance construction, repairs and maintenance highways. This has been met with predictable opposition from different groups around country. paper notes that using tolls as a means financing highways not particularly bad s...

Highlights of GAO-09-36, a report to congressional requesters As highway congestion continues to be a problem in many areas, states are looking to construct or expand highway projects. When a state department of transportation (DOT) receives federal funding for highway projects from the Federal Highway Administration (FHWA), the projects must comply with the National Environmental Policy Act (N...

We are using bobcats (Lynx rufus) as a model organism to examine how roads affect the abundance, distribution, and genetic structure of a wide-ranging carnivore. First, we compared the distribution of bobcat-vehicle collisions to road density and then estimated collision probabilities for specific landscapes using a moving window with road-specific traffic volume. Next, we obtained incidental o...

In a low-visibility environment, the speed of traffic flow is more discrete on highways, which easily causes accidents. To improve safety and efficiency level zones comprehensive optimization control method proposed. The uses formations zone to queue vehicles from upstream intersection. Then, according relationship between arrival time fleet phase state intersection, guidance trajectory are car...