IN TR O D U C TIO N Until recently aggregates were considered inert materials which, when mixed with some cementing agent, served as filler in concrete. This concept is far from reality. Research and experience have demonstrated that aggregates are physically and chemically active in ways that control their serviceability in concrete. Since these materials constitute about 75 per cent of the vo...

The results of an extensive literature review of the safety performances of lowand intermediate-traffic-volume, two-lane rural highways are presented. The effects on traffic safety, as measured by accident rates, of pavement width, radius of curve/degree of curve, gradient, sight distance, traffic volume, and design speed on curved sections of two-lane rural highways are covered. The following ...

HIGHWAYS OF THE BRAIN White matter is a lot like the highways of the brain. These highways connect different parts of the brain and pass information from one part of the brain to others. The better built the highways are, the easier it is to do things like read and do math. These connections or highways are called tracts, and each tract will connect different parts of the brain. There is a spec...

BACKGROUND Although the negative effects of roads on the genetics of animal populations have been extensively reported, the question of whether roads reduce gene flow in volant, urban bird populations has so far not been addressed. In this study, we assess whether highways decreased gene flow and genetic variation in a small passerine bird, the tree sparrow (Passer montanus). METHODOLOGY We a...

Assessment of GPS-enabled smartphone data and its use in traffic state estimation for highways

Lean construction has recently gained momentum in England’s highways construction supply chain. The literature indicates that the current view to Visual Management (VM) within those lean implementations is limited to some VM tools. This paper explores the condition of VM, which is a fundamental sensory information management strategy in the lean production system, in the highways sector in Engl...

whereas in other states similar roads are financed locally. Larger governments attain scale economies. However, they also tend to be more bureaucratic and have higher operating costs, all else being equal, because of problems such as span of control. A study was done to relate highway expenditures with the share of expenditure by state governments to determine how governments should allocate ex...