جستجوی مقالات مرتبط با کلیدواژه « حمل و نقل جاده ای » در نشریات گروه « فنی و مهندسی »

In today's world, issues such as the depletion of energy resources, environmental pollution, the increase in material and spiritual damages caused by accidents, the supervision and management of intercity transportation, the increase in wasted time, and the rapid growth of transportation demand in the world have become a serious problem in the road transportation sector. This is while the existence of smooth and safe transportation is one of the most fundamental infrastructures for development and increasing the level of well-being and social welfare in any country. On the other hand, the rapid growth of emerging technologies that play a driving role in various industries and economic sectors and guide the transportation industry towards becoming intelligent, increasing efficiency, and raising the level of service quality has attracted the attention of policymakers and planners in the country to use these emerging technologies to solve the serious problems in this field. Due to the limitations of resources, naturally, a comprehensive understanding and then prioritization of these technologies can be a step towards getting out of the current situation. In this research, an attempt has been made to identify emerging technologies in road transportation by conducting library studies and then prioritizing them using the multi-criteria decision-making method (TOPSIS). The results indicate that according to the indicators of national strategic goals in this sector, the "smart communication networks" technology ranks first, followed closely by "traffic automation" and "smart buses" technologies in the second and third ranks, respectively, with an index close to the first rank.

This article tries to study the revealed events while presenting a picture of the situation of the road transport sub-sector to address the issue of public finance policy in this sub-sector. Evidence suggests that in the current structure of the institution in charge of road transport policy and planning, the cost of transportation in the country and transit risk compared to global values ​​due to lack of integration and coherence in decision-making and policy-making is high. In comparative terms, although the overall quality of infrastructure and the quality of roads in Iran is almost the same as the average number of Islamic countries, but in comparison with countries such as Malaysia, Qatar, Turkey, Azerbaijan, Saudi Arabia, Oman, Kuwait, Indonesia rank Has a lower. Also, in terms of logistics performance index, Iran, with a rank of 64, has a lower position than the mentioned countries. Therefore, considering the special circumstances prevailing in the country (the issue of intensification of sanctions and economic recession), it is necessary to implement the revised solution in the public finance of the transportation sector (both public and private) as an urgent and immediate action in the country. . In addition, it seems that the category of general road transport expenditures in the country based on the policy in the two areas of management and development of road transport is possible and can be implemented.

The purpose of this study was to investigate the factors affecting the increase in demand in the rail and road system. For analyzing the data, panel data econometric models were used in this study using Eviews software. The research domain includes the province of Semnan in the rail and road transport axes, and the time domain of research based on the passenger displaced annually includes related variables from 90-94 years. In the rail transport network, all factors have a significant effect on passenger traffic, but the effect of employment rates is higher than other factors. Also, the results of the research show that in the road transport network, all factors have a significant effect on the movement of passengers, but the effect of population size is higher than other factors. according to the results, it is recommended to pay more attention to the structure of rail passenger transport companies Because these companies are mostly semi-public and monopolies that are already paying for fuel and the like, they create a safe margin for these companies. And in the long run, monopoly profits, employment efficiency. In order to improve the passenger transportation conditions, considering the fare price, it is suggested that the country's road network, taking into account subsidies and providing special services to owners of heavy passenger cars, take the action of fares and the rail network also extends from the scope. A wider range of train types with varying degrees of quality with Considering the economic conditions of the social strata Exploit.

However, the land transportation of dangerous goods via rail or road plays an effective role in development of business transactions and meeting the industrial requirements, it has a potential danger to the human life and property as well as the environment health. Therefore, the national and international regulations have passed specific requirements for the persons involved in transportation of such goods in order to prevent any incident and minimize the respective effects. In addition, some of the requirements have a contractual source which is imposed on the carrier in order to provide the utmost private and public interest. The carrier of dangerous goods is one of the parties to the transportation contract who plays an important role in monitoring the dangers resulted from transportation of such goods. The present research with a descriptive-analytic method intends to explain all the exclusive duties of the dangerous goods carrier by taking into consideration the contract of carriage and the international regulations governing the land transportation in comparison with those of in Iran. The conclusion of the research shows that the carrier who is aware of the dangerous nature of the goods is required to take the utmost care of the safety of the transportation process in order to prevent damage and protect the public interest. He/She has to take the utmost care in employing the experienced and trained staff, carrying out proper load, stowage and unloads, using vehicle appropriate for carriage of dangerous goods and checking the appearance of the cargo. However, in some regulations, it is not enough to take the utmost care for using the appropriate vehicle but the carrier shall provide the real and unavoidable proof in order to relieve of liability.

The road transport sector more important because the in Iran done the main contribution of the movement of goods and passengers by this section and efficient management and correct of activities for road transportation can accelerate the growth of this sector.
The objective of this paper is Estimate of production function in the Iran''s road transport sector using Translog production function during years of 1974-2011. The results show that if a percent Capital stock Increase¡ the value added of road transport will grow 16.86 percent. Partial elasticity of Labor is 14.26 that show increasing a percent in labor of road transport increased value added of road transport to 14.26. Another effective variable on factors of production in the Iran''s road transport sector is energy consumption that has a positive impact and the effect is 8.958 that Show increasing a percent in energy consumption of this sector¡ increased value added of road transport to 8.95.

Today, the displacement is one of the main requirements that achieved the economic results. In economics science displacement is a set of services that have economic value and is considered that the part of the production is process. The transport of the economic necessities that require further attention and consideration. In this paper, the travel demand of transport using vector auto regression (VAR) is estimated during 1350-89. Vector auto regression models were used to estimate. Model estimation results shows that long-term demand for passenger road transport has the greatest effects on the growth rate of GDP. This means that If the rate of GDP %1 growth, the demand for road transport passenger %1.04 increases. The model shows that the price elasticity of demand for passenger transport 0.78. In other words, the price elasticity of demand for passenger road transport is inelastic. Also with 1 percent increase the main road Length, demand for road transport of passengers 0.3 percent will be increased.

One of the main tools in strategic transportation planning is to use modeling methods for different modes of trip demand. In modeling interurban passenger trip demand especially in trip creating models or demand direct models, usually 3 to 4 demand effective independent parameters have been classically selected and then different models are made and calibrated using mathematical methods. The process for selection of effective factors on trip demand is one of the most important components in trip demand modeling which has been considered by few researchers. Some alternatives inserted in the model simultaneously may have similar effects. Therefore presentation of a scientific method for selection of effective factors on trip demand (among different alternatives) would be significantly important in making trip demand modelIn this paper classic parameters which are effective on creation of bus trip demand in road transportation system may be counted as population in different provinces of the country, number of students in Azad and state universities studying in 28 provinces of the country, level of employment in each province, monthly per capita income of urban households in each province, value added by industrial workshops in each province, number of mobile subscribers in each province and number of beds in dwelling establishments per province. As well trip time (incoming and outgoing trip times) and trip expenses (freight charge) are considered as effective parameters on selection of trip modes by urban bus passenger in state road transportation system. In this paper the method for selection of effective factors on urban bus trip demand by passenger in the state network has been given by compilation of a step by step factor analysis model and its reliability has been expressed. Evaluation of the results from purposed factor analysis for selection of the factors effective on urban bus passenger trip demand in the country show that 3 factors among 9 studied parameters can be extracted. Factors determined from the purposed factor analysis in this paper have been significant with 90% confidence in determination of dependant parameter. Conceptual interpretation of the main factors obtained from purposed factor analysis model have been compatible with fundamental concepts of effective factors on trip demand in engineering theoretic discussions in transportation so they may be used in interpretation of internal correlations of a set of demand effective alternatives. In this way, using main factors obtained from the purposed factor analysis the process for modeling urban bus passenger’s trip demand in the country can be accormplished by using the smallest determining concepts for explanation of the highest value and common variance in correlation matrix.