The VMS is one of the most effective tools in the field of intelligent transport systems, which in addition to the graphical representation of the traffic situation, can provide an appropriate notification platform for essential messages to users. For this purpose, in this paper, introducing the effective parameters in selecting the optimal placement of news message boards with the aim of maximizing the efficiency of this equipment in the distribution of traffic in urban roads, ARCGIS software has been used for this purpose. In this regard, by simulating the city-wide interurban network of Karaj in the software and defining the parameters involved in location selection, it is suggested that the locations are located, while in the optimal visual position, considering the volume of traffic, the decision-making power of users in choosing Other paths are provided after crossing the board.

The main reason of mortality at many roadways of the country is the accidents of heavy vehicles. These accidents cause creating high costs. Lorestan province is the passageway of many heavy vehicles due to its geographical location and being located on the border of the other industrial provinces such as Khoozestan , Markazi, and Esfahan and traffic of such vehicles is very high in the main roads of this province. According to the analysis conducted on the reported accident between the years of 92-93 , the amount of the blamed heavy vehicles increased by 10.69 percent had the highest growth and the fatal and injury accidents of these kinds of vehicles have increased respectively by 6.24 and 14.76 percent. There fore, considering some special measures for controlling the heavy vehicles seems necessary. This research has been provided based on the information and Com 114 records which were recorded by the police of Lorestan province and the analyzes have been performed by using SPSS software. The results of analyzes of heavy vehicle accidents have shown that the axes of the province and a major cause of accidents of this type of vehicles in summary are: 1. Failure to observe the right of way, paying attention to the front, the inability to control vehicle and assault and deviation to the left as the most important factors leading to the accident. 2. collision with a vehicle as most types of accidents 3. overturning, rear-end collision accident occurred and most of the accident 4. drivers aged 25 to 35 years as a high risk group for heavy vehicles Tsadafat 5. Category education diploma and diploma below the literacy level of most of the drivers at fault in the accident 6. The second half of the day as the time when most accidents.

Appropriate selection of road pavement maintenance options is economically an important process in the pavement maintenance management system. Using appropriate and reasonable models for economic judgment on periodic maintenance Alternative is an important and important point within the framework of the pavement management system, which analyzes the cost of life cycle of one of these methods. On the other hand, the study of failure indicators to identify the weaknesses of communication routes, in addition to improving the transport situation, can lead to preventing bad and bitter driving accidents. In this research, the input information required by RUCKS software was first provided and the basic values for the cost components of users were obtained, then the results of this software, along with other inputs required by Real Cost software, were compiled using Lifecycle cost analysis method, economic evaluation on the periodic options of pavement maintenance and maintenance has been introduced. In this study, the PCI index was used to investigate the structural integrity of the pavement and to achieve the pavement failure status. In order to apply the present research, the Gorgan-Kordkuy axis has been studied and evaluated, and all the parameters introduced in the Gorgan-Kordkuy axis have been presented. The results of the study show that failures in the Gorgan-Kordkuy axis can lead to irreparable damage over time as a result of non-refurbishment and restoration.

Rivers have a prominent role as one of the most important water resources that are constantly evolving. Therefore, recognition of the behavior and morphology of rivers, which is influenced by factors such as river form and structure, river geometry, bed shape, flow flow and characteristics of the river profile, is of particular importance in river engineering designs. These effects are very important in the meander rivers where there is an uneven flow in terms of velocity changes, shear stresses, water surface digits, and so on. In this research, an interval of the Karkheh River with an arch was selected. Then, the depth of water and the speeding were measured in three sections (input, arc and output) by field operations. In the following, using the two-dimensional model of CCHE2D flow, the daily flow of the river was modeled in non-sustained conditions in 2014. The results of this study indicate that the use of the CCHE2D model is efficient in simulating the flow pattern of the river.