nowadays, the environmental impact of transportation project and, especially air pollution impacts, are major concerns in evaluating transportation projects. based on this concern, beside definition of traditional objective functions like total travel time and total investment cost, different type of environmental related function is considered as objective function in urban network design. in ...

This paper inTroduces a framework inTegraTing available elemenTs of a safeTy conscious design process in one concise, pracTice-orienTed algoriThm. implemenTaTion of The proposed framework should enhance The consisTency and depTh of safeTy consideraTions in TransporTaTion corridor planning and design projecTs. inTroducTion It is relatively common for safety issues to remain undetected at the tra...

Safety and failure in gas pipelines are very important in gas and petroleum industry. For this reason, it is important to study the effect of different parameters in order to reach the maximum safety in design and application. In this paper, a three dimensional finite element analysis is carried out to study the effect of crack length, crack depth, crack position, internal pressure and pipe thi...