SYSTEMS APPROACH TO THE ROAD SAFETY PROBLEM IN TANZANIA
Road traffic accidents have been increasing in Tanzania, despite some considerable efforts to reduce the level of the problem. Road safety management is widely used worldwide in various forms and at different levels of refinement to manage traffic safety. This paper discusses and recommends the scientific methods that should be used to alleviate the road safety problems in Tanzania.
A STUDY ON SPEED HUMPS
This study discusses the use of speed humps as a traffic calming measure in residential neighborhoods. It differentiates between speed humps and speed bumps; discusses their use, and effects on motor vehicles and their speed; presents ideas on their design and location; and relates other considerations, especially bicyclists and motorcyclists.
Transient nonlinear thermal stability analysis of metro cable under pulse power
The load of metro cable system varies a lot from morning rush hours to the evening closure time. With many trains hopping in the rush hours, the long term and economical short term thermal stability become a big issue as a result of the large difference between thermal time constant and the electrical time constant of cable. Based on a 10kV three-core XLPE metro power cable model, the theoretical thermal capacity was calculated according IEC standard. Then, a Finite Element Method (FEM) was employed to analyze the transient electro-thermal phenomena, taking into account various types of power loss in cable system and the non-linear electrical conductivity of the conductor. Finally, the thermal distribution inside the cable was presented as a function of time, and the maximum thermal capacity was predicted in metro cable.