There is growing evidence of a distinct set of freshly-emitted air pollutants downwind from major highways, motorways, and freeways that include elevated levels of ultrafine particulates (UFP), black carbon (BC), oxides of nitrogen (NOx), and carbon monoxide (CO). People living or otherwise spending substantial time within about 200 m of highways are exposed to these pollutants more so than per...

W ith the advent of the automobile as a mode of transportation late in the nineteenth century, a new phenomenon, the motor vehicle acci­ dent, appeared on the American scene. While the motor vehicle was in its early stages of development, the problem was not serious. How­ ever, as the volume of cars on the highways increased, the number of accidents increased also; the problem began to assume g...

Many studies provide sobering statistics on the number of mooseand deer-vehicle collisions that occur annually on North American highways, and the resulting property damage, animal deaths, personal injuries, and human fatalities. Recent accidents involving moose in New Brunswick have again brought the issue to the forefront. This study was undertaken to identify those sections of various New Br...

a response to the problem of irans backwardness preoccupied the minds of intellectual and political forces. since irans failure from russia while different domestic and external factors caused to defeat, differend and even contending views concerning irans backwardness played a key role in these failures. these diverse and contending views which arised at first in compilation of laws and establ...

In India, 486,476 crashes are reported and 137,572 fatalities during 2013. Major share of crashes (28.8% of total crashes) are on National Highways. Considering high importance of NHs in overall road network with respect to its connectivity to state capitals and business centres, and cater to high share of traffic (40%), there is an urgent need to investigate factors contributing to crashes on ...

We exploit historical data on planned highways, railroads, and exploration routes as sources of exogenous variation in order to estimate the effect of interstate highways on regional innovation: a 10% increase in a region’s stock of highways causes a 1.7% increase in regional patenting over a five-year period. In terms of the mechanism, we report evidence that roads facilitate local knowledge f...

This paper presents a version of the monocentric city model that incorporates heterogeneous commuting speeds by introducing radial commuting highways. This model implies that metropolitan area population spreads out along new highways, which are positively valued by residents. Simulations of conservative specifications of the model imply that each additional highway ray causes about a 10 percen...

this paper tries to survey irans regional labor market disequilibrium within 1996-2000. according to the results there has been an increase in the amount of disequilibrium of irans national as well as regional labor markets. incomplete labor market information on vacant job opportunities in different regions of the country along with high costs of migration have been the major causes of unemplo...