The optimum road spacing has been studied by many researches. It is an important step of forest road network planning. The goals of this study are determining the optimum road spacing in Kheiroudkenar forest of Nowshahr in Northern Iran and study of effect of kind of skidder on skidding cost and road spacing. Continues time study method was used to determine the production rate of TAF and Timbe...

the optimum road spacing has been studied by many researches. it is an important step of forest road network planning. the goals of this study are determining the optimum road spacing in kheiroudkenar forest of nowshahr in northern iran and study of effect of kind of skidder on skidding cost and road spacing. continues time study method was used to determine the production rate of taf and timbe...

A study was initiated in the Winter of 1998 to examine the utility of employing Global Positioning Systems (GPS) to monitor harvest traffic throughout a loblolly pine plantation and utilize traffic intensity information to assess impacts of select soil physical properties. Traffic maps prepared from GPS positional data indicated the highest concentration of traffic intensities occurred in the l...

The aim of the proposed study was to show fuel consumption various log skidders and create models for estimating different forwarders operating in cutting areas with tree size characteristics. Production tests forwarders' operation at have been carried out. In experimental studies, from countries were used. particular, forwarders: Amkodor-2682 (Belarus), Komatsu 840 (Japan), TB-1M-16A (Russia)....

a total of 38, 300 traffic collisions have occurred in tehran, the capital of iran, during 1973. 5, 655 of these collisions in 6, 700 injuries and 560 deaths are selected and discussed. there has been no difference between the accident rates in working and holidays. winter has had the lowest rate, and accidents have been in direct relationship with the crowdedness and heavy traffic periods. nin...

the police are competent and always present contact persons who have direct knowledge and experience and act as role models in the area of road traffic. one of the focuses of police work is to increase tolerance and consideration, especially for more vulnerable road users. the priorities of the police are geared at emphasizing how relevant and appropriate the decisions made by road traffic auth...

short-term traffic flow forecasting plays a significant role in the intelligent transportation systems (its), especially for the traffic signal control and the transportation planning research. two mainly problems restrict the forecasting of urban freeway traffic parameters. one is the freeway traffic changes non-regularly under the heterogeneous traffic conditions, and the other is the success...

today, the number of drivers and traffic users is increasing. so, it is necessary to know that the human factor has the most important factor in the traffic. thus, any behavior change or fault that arises from human factor (for example drivers) can have inappropriate impacts on the traffic. so, it is important that traffic users be trained about the effectiveness and attention to the traffic si...

today’s, a common problem in cities is increasing delay and reducing the speed of traffic. on the other wise increasing costs of acquisition in urban area are not allow new routes and highways. also construction of new highway or street such as imam ali highway and sadr highway in tehran lead to develop new applications (such as brt lane ,…) and become quickly saturate and less efficient. there...