City streets in this country represent an annual capital outlay of $3,133 billion, based on 1966 data. This figure is more than one-third of the total annual capital outlay for all streets and highways, $9,123 billion. Another $1,114 billion was spent annually for maintenance of city streets, so $4,247 billion was spent each year on city streets. O f this total $4 billion, $2.5 billion went to ...

There is little doubt that those of us who are involved in the great industry of motor vehicle transportation—whether it be along the lines of design, maintenance, or operations—have come to recognize that street and highway capacity considerations are indispensable. It is unfortunate, however, that too often there is a lack of clear understanding of what we mean by capacity and how it actually...

Redesigning of the traffic system on highways, streets and avenues is quite important, when aspects such as network plan, geometric design, traffic control, operation, regulation and enforcement of roads are considered as a unified system. The ‘highways’, which should primarily consider transport function for intercity connections, and ‘streets and avenues’, which should also involve the variou...

High density traffic on highways and city streets consists of endless interactions among participants. These the corresponding behaviours have great impact not only throughput but also safety, comfort economy. Because this, there is a interest in deeper understanding these concluding impacts This paper explores maps world behaviour analysis, especially researches focusing groups vehicles called...

in recent years, increasing population, vehicles and industrial growth have caused air pollution that is initiated many environment problems and damaged public health. to check the air quality in different regions, pollution data that are collected in air pollution stations are required. for better and more realistic monitoring of air pollution, the stations must be distributed exactly and even...